Swedish National Quality Register Research Articles

Complications after benign gynecologic surgery-How are they captured in register-based research? A national register study in Sweden.

The evidence on complication rates after gynecological surgery is based on multiple types of studies, and the level of evidence is generally low. We aimed to validate the registration of complications in the Swedish National Quality Register of Gynecological Surgery (GynOp), by cross-linkage to multiple national registers. A national register-based study using prospectively collected data was conducted, including women who had surgery on the uterus or adnexa for benign indications from January 1, 2017, to December 31, 2020. In Sweden, complications after gynecological surgery are registered in GynOp, and if the complication has rendered any interaction with healthcare, it is also in national health registers. The GynOp register, the National Patient Register, the Prescribed Drugs Register, and the Cause of Death Register were cross-linked. Complications in GynOp and complications according to ICD10 were analyzed, as well as the cause of death if occurring within 3 months of surgery and prescription of antibiotics ≤30 days. Comparisons between the registries were descriptive. During the study period 32 537 surgeries were performed, of which 26 214 (80.6%) were minimally invasive. Complications were reported in GynOp for 569 women (1.7%) at surgery, 1045 (3.2%) while admitted, and 3868 (13.7%) from discharge to 3 months after surgery. In comparison, according to the Patient Register, 2254 women (6.9%) had postoperative complications within 3 months of discharge (difference of 6.8 percentage points [95% confidence interval 6.2-7.2]). Furthermore, 4117 individuals (12.7%) had a prescription of antibiotics ≤30 days which could indicate a postoperative infection. The rates of hemorrhage, wound dehiscence, and thrombosis were comparable between GynOp and the Patient Register while diagnoses not leading to contact with specialized care had higher rates in the quality register. The coverage of complications was 79.1% in GynOp and 46.1% in the Patient Register, using the total number of complications from both registers as the denominator. A higher frequency of complications is captured in GynOp than in the National Patient Register. Patient-reported outcomes assessed by a physician are beneficial in identifying complications indicating the importance of structured pre-defined follow-up over a set period.

Predicting ERCP procedure time - the SWedish Estimation of ERCP Time (SWEET) tool.

The duration of an endoscopic retrograde cholangiopancreatography (ERCP) is influenced by a multitude of factors. The aim of this study was to describe the factors influencing ERCP time and to create a tool for preintervention estimation of ERCP time. Data from 74 248 ERCPs performed from 2010 to 2019 were extracted from the Swedish National Quality Registry (GallRiks) to identify variables predictive for ERCP time using linear regression analyses and root mean squared error (RMSE) as a loss function. Ten variables were combined to create an estimation tool for ERCP duration. The tool was externally validated using 9472 ERCPs from 2020 to 2021. Mean (SD) ERCP time was 36.8 (25.3) minutes. Indications with the strongest influence on ERCP time were primary sclerosing cholangitis and chronic pancreatitis. Hilar and intrahepatic biliary strictures and interventions on the pancreatic duct were the anatomic features that most strongly affected ERCP time. The procedure steps with most influence were intraductal endoscopy, lithotripsy, dilation, and papillectomy. Based on these results, we built and validated the SW: edish E: stimation of E: RCP T: ime (SWEET) tool, which is based on a 10-factor scoring system (e.g. 5 minutes for bile duct cannulation and 15 minutes for pancreatic duct cannulation) and predicted ERCP time with an average difference between actual and predicted duration of 17.5 minutes during external validation. Based on new insights into the factors affecting ERCP time, we created the SWEET tool, the first specific tool for preintervention estimation of ERCP time, which is easy-to-apply in everyday clinical practice, to guide efficient ERCP scheduling.

71523 - 25 years with the Swedish national quality register for cleft lip and palate: -Where are we now?

71523 - 25 years with the Swedish national quality register for cleft lip and palate: -Where are we now?

Seizure Duration and Electroconvulsive Therapy in Major Depressive Disorder

Electroconvulsive therapy (ECT), wherein a generalized epileptic seizure is induced, is a treatment for major depressive disorder (MDD). Currently, it is unclear whether there is an association between seizure length and treatment outcome. To explore the association between seizure duration, potential confounding variables, and ECT treatment outcome. This population-based cohort study obtained data from the Swedish National Quality Register for ECT. Patients treated for unipolar MDD with unilateral electrode placement between January 1, 2012, and December 31, 2019, were included. The electroencephalographic (EEG) seizure duration from the first ECT treatment session for each patient was used for analysis. Data analyses were performed between March 2021 and May 2024. The primary outcome was remission, defined as a cutoff score of less than 10 points on the self-assessment version of the Montgomery-Åsberg Depression Rating Scale within 1 week after ECT. Multivariate logistic regression analysis was performed to calculate odds ratios (ORs) between different seizure duration groups. Furthermore, the associations between concomitant use of pharmacological treatments, seizure duration, and remission rate were explored. Among the 6998 patients included, 4229 (60.4%) were female and the mean (SD) age was 55.2 (18.6) years. Overall, 2749 patients (39.3%) achieved remission after ECT. Patients with EEG seizure duration of 60 to 69 seconds had the highest remission rates compared with patients with seizure duration of less than 20 seconds (OR, 2.17; 95% CI, 1.63-2.88; P < .001). Anticonvulsant medications were associated with shorter seizure duration (eg, lamotrigine: β coefficient [SE], -6.02 [1.08]; P < .001) and lower remission rates (eg, lamotrigine: adjusted OR, 0.67; 95% CI, 0.53-0.84; P < .001). This study found an association between seizure length and remission from MDD. Use of anticonvulsant medication during ECT was associated with shorter seizure duration and lower remission rates after ECT.

Partial Clinical Remission of Type 1 Diabetes in Swedish Children: A Longitudinal Study from the Swedish National Quality Register (SWEDIABKIDS) and the Better Diabetes Diagnosis (BDD) Study.

Aims/Hypotheses: To investigate the frequency and characteristics of partial remission in Swedish children with type 1 diabetes and whether the insulin delivery method, that is, continuous subcutaneous insulin infusion (CSII) or multiple daily injections (MDIs), affects incidence and duration of this period, 2007-2011. Factors that increase the proportion of subjects who enter partial remission and extend this period can improve long-term metabolic control and reduce the risk of severe hypoglycemia, improve quality of life, and, in the long run, reduce late complications. Methods: Longitudinal data from 2007 to 2020 were extracted from the Swedish National Quality Register (SWEDIABKIDS) with all reported newly diagnosed children. Data on C-peptide from the participants in the Better Diabetes Diagnosis study from 2007 to 2010 were used. The definition of partial remission was insulin dose-adjusted HbA1c: HbA1c (%) + [4 × total daily insulin dose (U/kg/day)] ≤9. Results: Of the 3887 patients, 56% were boys. More boys than girls were in partial remission throughout the follow-up period until 24 months after diabetes onset. Fewer children 0-6 years old had partial remission at 3 and 12 months but not at 24 months compared with older age-groups. A larger proportion of patients using CSII at 12 and 24 months remained in partial remission compared with those with MDI (37% vs. 33%, P = 0.02 and 31% vs. 27%, P = 0.01, respectively). The level of C-peptide was higher in the group with partial remission and mean HbA1c was lower (both P < 0.001). Partial remission at 12 months after diabetes onset was associated with CSII (odds ratio [OR]: 1.39, confidence interval [CI]:1.13, 1.71), shorter diabetes duration (OR: 0.80, CI: 0.76, 0.84), and male sex (OR: 1.23, CI: 1.04, 1.46). Conclusions/Interpretation: Insulin through MDI, longer duration of diabetes, and female sex were associated with lower frequency of partial remission. Use of CSII seems to contribute to longer partial remission among Swedish children with type 1 diabetes.

Obesity as an independent risk factor for poor long-term outcome after mid-urethral sling surgery.

High body mass index (BMI) is a risk-factor for stress urinary incontinence (SUI). Mid-urethral sling (MUS) surgery is an effective treatment of SUI. The aim of this study was to investigate if there is an association between BMI at time of MUS-surgery and the long-term outcome at 10 years. Women who went through MUS surgery in Sweden between 2006 and 2010 and had been registered in the Swedish National Quality Register of Gynecological Surgery were invited to participate in the 10-year follow-up. A questionnaire was sent out asking if they were currently suffering from SUI or not and their rated satisfaction, as well as current BMI. SUI at 10 years was correlated to BMI at the time of surgery. SUI at 1 year was assessed by the postoperative questionnaire sent out by the registry. The primary aim of the study was to investigate if there is an association between BMI at surgery and the long-term outcome, subjective SUI at 10 years after MUS surgery. Our secondary aims were to assess whether BMI at surgery is associated with subjective SUI at 1-year follow-up and satisfaction at 10-year follow-up. The subjective cure rate after 10 years was reported by 2108 out of 2157 women. Higher BMI at the time of surgery turned out to be a risk factor for SUI at long-term follow-up. Women with BMI <25 reported subjective SUI in 30%, those with BMI 25-<30 in 40%, those with BMI 30-<35 in 47% and those with BMI ≥35 in 59% (p < 0.001). Furthermore, subjective SUI at 1 year was reported higher by women with BMI ≥30, than among women with BMI <30 (33% vs. 20%, p < 0.001). Satisfaction at 10-year follow-up was 82% among women with BMI <30 vs 63% if BMI ≥30 (p < 0.001). We found that higher BMI at the time of MUS surgery is a risk factor for short- and long-term failure compared to normal BMI.

Importance of resection margin after resection of colorectal liver metastases in the era of modern chemotherapy: population-based cohort study.

Resection margin has been associated with overall survival following liver resection for colorectal liver metastasis. The aim of this study was to examine how resection margins of 0.0 mm, 0.1-0.9 mm and ≥1 mm influence overall survival in patients resected for colorectal liver metastasis in a time of modern perioperative chemotherapy and surgery. Using data from the national registries Swedish Colorectal Cancer Registry and Swedish National Quality Registry for Liver, Bile Duct and Gallbladder Cancer, patients that had liver resections for colorectal liver metastasis between 2009 and 2013 were included. In patients with a narrow or unknown surgical margin the original pathological reports were re-reviewed. Factors influencing overall survival were analysed using a Cox proportional hazard model. A total of 754 patients had a known margin status, of which 133 (17.6%) patients had a resection margin <1 mm. The overall survival in patients with a margin of 0 mm or 0.1-0.9 mm was 42 (95% c.i. 31 to 53) and 48 (95% c.i. 35 to 62) months respectively, compared with 75 (95% c.i. 65 to 85) for patients with ≥1 mm margin, P < 0.001. Margins of 0 mm or 0.1-0.9 mm were associated with poor overall survival in the multivariable analysis, HR 1.413 (95% c.i. 1.030 to 1.939), P = 0.032, and 1.399 (95% c.i. 1.025 to 1.910), P = 0.034, respectively. Despite modern chemotherapy the resection margin is still an important factor for the survival of patients resected for colorectal liver metastasis, and a margin of ≥1 mm is needed to achieve the best possible outcome.

Socioeconomic factors and outcome after repair and reconstruction of digital and major nerve trunk injuries in the upper limb

Peripheral nerve injuries in the upper limb can lead to substantial disability and pain. We aimed to assess how socioeconomic factors affect outcomes after repaired or reconstructed digital or major nerve trunk injuries in the upper limb. We identified 670 individuals, who underwent surgical nerve repair or reconstruction using sensory nerve autografts, in the Swedish National Quality Registry for Hand Surgery 2010–2018. Socioeconomic factors, including education, cohabitation, type of work, sick leave, immigrant status and income, were gathered from the Swedish statistical agency (www.scb.se) and National Diabetes Register (NDR). We calculated prevalence ratios (PR) to assess the relationship between socioeconomic factors and surgical outcomes for the nerve injuries. Individuals with a major nerve trunk injury had higher QuickDASH scores and lower income compared to those with digital nerve injury. Individuals with immigration background (adjusted PR = 2.0, 95% CI 1.2–3.2), history of > 4 weeks of sick leave the year before surgery (adjusted PR = 1.8, 95% CI 1.1–3.1), or education level below tertiary (adjusted PR = 2.8, 95% CI 1.7–4.7) had significantly higher QuickDASH scores. Recognizing impact of non-biological factors, including immigration, prior sick leave, and education level, on outcome after nerve surgery is crucial for improving prognosis in socioeconomically deprived individuals.

Impact of patient-reported salpingitis on the outcome of hysterectomy and adnexal surgery: A national register-based cohort study in Sweden.

Salpingitis is caused by ascending microbes from the lower reproductive tract and contributes to tubal factor infertility, ectopic pregnancy, and chronic pelvic pain. The aim of this study was to analyze if the risk for complications and dissatisfaction after hysterectomy and adnexal surgery was increased in women reporting previous salpingitis. This is an observational cohort study including women undergoing gynecologic surgery from 1997 to 2020, registered in the Swedish National Quality Register of Gynecologic Surgery (GynOp). Patient-reported previous salpingitis was the exposure. Complications up to 8 weeks and satisfaction at 1 year postoperatively were the outcomes. Multivariable logistic regression and ordinal regression were performed. Results were adjusted for potential confounders including age, body mass index, smoking and year of procedure as well as endometriosis and previous abdominal surgery. Multiple imputation was used to handle missing data. In this study, 61 222 women were included, of whom 5636 (9.2%) women reported a previous salpingitis. There was an increased risk for women reporting previous salpingitis in both the unadjusted and fully adjusted models to have complications within 8 weeks of surgery (adjusted odds ratio [aOR] 1.22, 95% confidence interval [CI] 1.14-1.32). The highest odds ratios were found for bowel injury (aOR 1.62, 95% CI 1.29-2.03), bladder injury (aOR 1.52, 95% CI 1.23-1.58), and postoperative pain (aOR 1.37, 95% CI 1.22-1.54). Women exposed to salpingitis were also more likely to report a lower level of satisfaction 1 year after surgery compared with unexposed women (aOR 0.87, 95% CI 0.81-0.92). Self-reported salpingitis appears to be a risk factor for complications and dissatisfaction after gynecologic surgery. This implies that known previous salpingitis should be included in the risk assessment before gynecologic procedures.

P941 Observational study of tofacitinib in ulcerative colitis in Sweden (ODEN) – Interim analysis of clinical and biomarker data

Abstract Background Tofacitinib is a Janus kinase (JAK) inhibitor for the treatment of moderate to severe ulcerative colitis (UC). ODEN is an ongoing Swedish multicentre prospective observational study regarding effectiveness of tofacitinib in UC. In this interim analysis, we aimed to assess the clinical outcomes during the first 16 weeks. Methods Patients with active UC were enrolled 2020-2023 when starting tofacitinib as per clinical indication. Inclusion criteria were fecal (F) calprotectin &amp;gt;250 mg/kg or Mayo endoscopic score ≥2. Data were collected using an electronic case report form linked to the Swedish National Quality Registry for Inflammatory Bowel Disease (SWIBREG). Data concerning inflammatory markers, endoscopic activity, partial (p) Mayo, extra intestinal manifestations, health-related quality of life measures, corticosteroid use, and colectomy rates were collected regardless of tofacitinib discontinuation. Information collected at week 8 and 16 is presented here. Intention-to-treat (ITT) analysis was applied and tofacitinib discontinuation was considered as treatment failure (i.e., no tofacitinib-induced clinical or laboratory response or remission). McNemar’s test was used for proportion differences. Results The proportion of patients who previously had failed at least one biologic was 95% and at least two biologics, 62%. At inclusion, median p-Mayo was 5 and 39% of patients were on corticosteroids (Table 1a). Patients’ survival on drug is shown in Figure 1a. At week 8 and 16, 42% and 43%, respectively, achieved corticosteroid free clinical remission, Figure 1b. A 50% reduction in F-calprotectin was seen in 54% and 49% at week 8 and 16, respectively. The endpoint of Mayo endoscopic score 0 and/or F-calprotectin &amp;lt;100 mg/kg was achieved by 30% and 38% at week 8 and 16, respectively. Arthralgia frequency decreased significantly from baseline from 29% at inclusion to 13% and 11% at week 8 and 16 respectively. Three patients underwent colectomy the first 16 weeks (Table 1b). Conclusion After 16 weeks of treatment with tofacitinib, a substantial proportion of previously treatment refractory UC patients were in clinical and endoscopic corticosteroid-free remission, and a distinct improvement in F-calprotectin levels was observed. In addition, a significant reduction in arthralgia was noted.

P1047 Observational study of tofacitinib in Ulcerative Colitis in Sweden (ODEN) – Interim analysis of health-related quality of life and fatigue

Abstract Background Ulcerative colitis (UC) has a major impact on daily life. The Janus Kinas (JAK) inhibitor tofacitinib is effective in achieving remission in UC, but prospective real-world evidence concerning the effect on health-related quality of life (HRQoL) and fatigue are still scarce. Fatigue is a component of UC that is notoriously difficult to treat and not unambiguously related to inflammatory activity. ODEN is an ongoing Swedish multicentre prospective observational study of tofacitinib in UC. In this interim analysis, we assessed the effectiveness on HRQoL and fatigue during the first 16 weeks. Methods Patients with UC and active inflammation were enrolled 2020-2023 when starting tofacitinib as per clinical indication. To measure various aspects of impairment of daily life, the validated questionnaires Short Health Scale (SHS), EQ-5D-5L [Swedish value set], and IBD-fatigue scale (IBD-F) were used. These data and information concerning clinical, biochemical, and endoscopic outcomes were collected in an e-CRF linked to the Swedish National Quality Registry for Inflammatory Bowel Disease (SWIBREG). For HRQoL outcomes, per protocol analysis was applied. Paired t-test and Wilcoxon’s signed-rank test were used for mean and median differences, respectively. Results In total, 103 patients were included. Baseline data are shown in Table 1a. For patients still on tofacitinib treatment, all four dimensions of the SHS (symptoms, social function, disease related worry, and general well-being) improved significantly, Table 1b. A median decrease of one point from baseline was seen at week 8 in each of the parameters, which was maintained through week 16 with a tendency towards further improvement. EQ-5D-5L showed an impairment mainly in the aspects of pain/discomfort and ability to participate in common daily activities. Improvement in these dimensions was seen from baseline to week 16. The overall EQ-5D-5L index improved significantly from baseline (0.80) to week 8 (0.86) and week 16 (0.89), as did the EQ VAS 0-100 reflecting overall health (58, 71, and 74, respectively). A significant improvement in IBD-F part 1 and 2 was seen at week 8 and 16, Figure 1. Conclusion This study demonstrates that tofacitinib treatment covariates with positive changes in a variety of measures of patients’ quality of life, including improvements in self-assessed overall wellbeing. Finally, fatigue significantly improved during tofacitinib treatment. Thus, tofacitinib treatment shows association with meaningful improvements in multiple aspects of quality of life during the first 16 weeks of treatment.

The influence of organizational models on the implementation of internet-based cognitive behavior therapy in primary care: A mixed methods study using the RE-AIM framework

BackgroundInternet-Based Cognitive Behavioral Therapy (iCBT) holds great potential in addressing mental health issues, yet its real-world implementation poses significant challenges. While prior research has predominantly focused on centralized care models, this study explores the implementation of iCBT in the context of decentralized organizational structures within the Swedish primary care setting, where all interventions traditionally are delivered at local Primary Care Centers (PCCs). AimThis study aims to enhance our understanding of iCBT implementation in primary care and assess the impact of organizational models on the implementation's outcome using the RE-AIM (Reach, Effectiveness, Adoption, Implementation, Maintenance) framework. MethodA mixed-methods research design was employed to identify the factors influencing iCBT implementation across different levels, involving patients, therapists and managers. Data spanning two years was collected and analyzed through thematic analysis and statistical tests. The study encompassed 104 primary care centers, with patient data (n = 1979) sourced from the Swedish National Quality Register for Internet-Based Psychological Treatment (SibeR). Additionally, 53 iCBT therapists and 50 PCC managers completed the Normalization Measure Development Questionnaire, and 15 leaders participated in interviews. ResultsOur investigation identified two implementation approaches, one concentrated and one decentralized. Implementation effectiveness was evident through adherence rates suggesting that iCBT is a promising approach for treating mental ill-health in primary care, although challenges were observed concerning patient assessment and therapist drift towards unstructured treatment. Mandatory implementation, along with managerial and organizational support, positively impacted adoption. Results vary in terms of adherence to established protocols, with therapists working in concentrated model showing a significantly higher percentage of registration in the quality register SibeR (X2 (1, N = 2973) = 430.5774, p = 0.001). They also showed significantly higher means in cognitive participation (Z = −2.179, p = 0.029) and in reflective monitoring (Z = −2.548, p = 0.011). DiscussionOverall, the study results demonstrate that iCBT, as a complex and qualitatively different intervention from traditional psychological treatment, can be widely implemented in primary care settings. The study's key finding highlights the substantial advantages of the concentrated organizational model. This model has strengths in sustainability, encourages reflective monitoring among therapists, the use of quality registers, and enforces established protocols. ConclusionIn conclusion, this study significantly contributes to the understanding of the practical aspects associated with the implementation of complex internet interventions, particularly in the context of internet-based cognitive-behavioral therapy (iCBT). The study highlights that effective iCBT integration into primary care requires a multifaceted approach, taking into account organizational models, robust support structures, and a commitment to maintaining quality standards. By emphasizing these factors, our research aims to provide actionable insights that can enhance the practicability and real-world applicability of implementing iCBT in primary care settings.

Association between pulse width and health-related quality of life after electroconvulsive therapy in patients with unipolar or bipolar depression: an observational register-based study

Aims To examine the association between pulse width and HRQoL measured within one week after electroconvulsive therapy (ECT) and at six-month follow-up in patients with unipolar or bipolar depression. Methods This was an observational register study using data from the Swedish National Quality Registry for ECT (2011–2019). Inclusion criteria were: age ≥18 years; index treatment for unipolar/bipolar depression; unilateral electrode placement; information on pulse width; EQ-5D measurements before and after ECT. Multiple linear regressions were performed to investigate the association between pulse width (<0.5 ms; 0.5 ms; >0.5 ms) and HRQoL (EQ-5D-3L index; EQ VAS) one week after ECT (primary outcome) and six months after ECT (secondary outcome). Results The sample included 5,046 patients with unipolar (82%) or bipolar (18%) depression. At first ECT session, 741 patients (14.7%) had pulse width <0.5 ms, 3,639 (72.1%) had 0.5 ms, and 666 (13.2%) had >0.5 ms. There were no statistically significant associations between pulse width and HRQoL one week after ECT. In the subsample of patients with an EQ-5D index recorded six months after ECT (n = 730), patients receiving 0.5 ms had significantly lower HRQoL (−0.089) compared to <0.5 ms, after adjusting for demographic and clinical characteristics (p = .011). The corresponding analysis for EQ VAS did not show any statistically significant associations. Conclusion No robust associations were observed between pulse width and HRQoL after ECT. On average, significant improvements in HRQoL were observed one week and six months after ECT for patients with unipolar or bipolar disease, independent of the pulse width received.

Noninvasive Staging of Lymph Node Status in Breast Cancer Using Machine Learning: External Validation and Further Model Development.

Most patients diagnosed with breast cancer present with a node-negative disease. Sentinel lymph node biopsy (SLNB) is routinely used for axillary staging, leaving patients with healthy axillary lymph nodes without therapeutic effects but at risk of morbidities from the intervention. Numerous studies have developed nodal status prediction models for noninvasive axillary staging using postoperative data or imaging features that are not part of the diagnostic workup. Lymphovascular invasion (LVI) is a top-ranked predictor of nodal metastasis; however, its preoperative assessment is challenging. This paper aimed to externally validate a multilayer perceptron (MLP) model for noninvasive lymph node staging (NILS) in a large population-based cohort (n=18,633) and develop a new MLP in the same cohort. Data were extracted from the Swedish National Quality Register for Breast Cancer (NKBC, 2014-2017), comprising only routinely and preoperatively available documented clinicopathological variables. A secondary aim was to develop and validate an LVI MLP for imputation of missing LVI status to increase the preoperative feasibility of the original NILS model. Three nonoverlapping cohorts were used for model development and validation. A total of 4 MLPs for nodal status and 1 LVI MLP were developed using 11 to 12 routinely available predictors. Three nodal status models were used to account for the different availabilities of LVI status in the cohorts and external validation in NKBC. The fourth nodal status model was developed for 80% (14,906/18,663) of NKBC cases and validated in the remaining 20% (3727/18,663). Three alternatives for imputation of LVI status were compared. The discriminatory capacity was evaluated using the validation area under the receiver operating characteristics curve (AUC) in 3 of the nodal status models. The clinical feasibility of the models was evaluated using calibration and decision curve analyses. External validation of the original NILS model was performed in NKBC (AUC 0.699, 95% CI 0.690-0.708) with good calibration and the potential of sparing 16% of patients with node-negative disease from SLNB. The LVI model was externally validated (AUC 0.747, 95% CI 0.694-0.799) with good calibration but did not improve the discriminatory performance of the nodal status models. A new nodal status model was developed in NKBC without information on LVI (AUC 0.709, 95% CI: 0.688-0.729), with excellent calibration in the holdout internal validation cohort, resulting in the potential omission of 24% of patients from unnecessary SLNBs. The NILS model was externally validated in NKBC, where the imputation of LVI status did not improve the model's discriminatory performance. A new nodal status model demonstrated the feasibility of using register data comprising only the variables available in the preoperative setting for NILS using machine learning. Future steps include ongoing preoperative validation of the NILS model and extending the model with, for example, mammography images.

Cortical auditory evoked potentials (P1 latency) in children with cochlear implants in relation to clinical language tests

Objective – To study the correlation between P1 latency and the results of clinical language tests (Reynell III and TROG-2), the latter were used as they are recommended for follow-up assessments of children with cochlear implants (Cis) by the Swedish National Quality Register for children with hearing impairment. Design – A clinical cohort study. Study sample – Cross-sectional and consecutive sampling of 49 children with CIs coming for clinical follow-up assessment from March 2017 – December 2019. Results – For all children tested, there was a significant negative correlation (Spearman’s rho= −0.403, p = 0.011) between hearing age and P1 latency. A significant correlation between P1 latency and the Reynell III result (Spearman’s rho = −0.810, p = 0.015) was found. In the TROG-2 group, there was no significant correlation between their P1 latency and their language test results (Spearman’s rho −0.239, p = 0.196). Conclusion – This method seems to be feasible and easily accepted. The study was conducted in a heterogeneous group of children that we meet daily in our clinic. The results indicated that P1 latency has a negative correlation with language development among our youngest patients fitted with CIs and might be a clinical tool to assess the maturation of central auditory pathways.

Recent Secular Trends of Body Mass Index in Individuals With Bipolar Disorders and in the General Population.

The aims of this study were to investigate secular trends and distribution of body mass index (BMI) among individuals with bipolar disorders and the general population between 2008 and 2019. Data were from the Swedish National Quality Register for Bipolar Disorder, where 24,423 adults with bipolar disorders were identified, and from the national Swedish Living Conditions Surveys, where 77,485 adults from the general population were identified. Quantile regression was used to compare the 15th, 50th, and 85th percentiles of BMI across age and study years. The study sample included 22,127 individuals with bipolar disorders (mean age, 48 years; 63% women) and 71,894 individuals from the general population (mean age, 52 years; 51% women). BMI percentiles were higher among individuals with bipolar disorders. At the 50th percentile, the BMI group differences were 1.1 (95% CI=0.8-1.14) for men and 1.8 (95% CI=1.5-2.1) for women. The gap was widest at the 85th BMI percentile: men, 2.3 (95% CI=1.8-2.8); women, 4.1 (95% CI=3.7-4.6). BMI increased over time in both study groups, but more in the group with bipolar disorders. The changes per decade in mean BMI were 0.4 (95% CI=0.3-0.5) among men in the general population, 1.1 (95% CI=0.7-1.4) among men with bipolar disorders, 0.6 (95% CI=0.5-0.7) among women in the general population, and 1.4 (95% CI=1.1-1.7) among women with bipolar disorders. Women with bipolar disorders had the highest prevalence and the greatest rate of increase of obesity. In 2019, the obesity prevalence was 33% among women and 29% among men with bipolar disorders, compared with 13% and 15%, respectively, among women and men in the general population. Adults with bipolar disorders had a higher BMI and a higher prevalence of obesity than the general population, indicating a higher cardiometabolic risk. Annually, BMI increased more in the group with bipolar disorders than in the general population, particularly among women and among those with high BMI.

P21.02.B THE EFFECT OF SOCIODEMOGRAPHIC FACTORS ON GLIOMA PROGNOSIS

Abstract BACKGROUND Sociodemographic factors are well known to contribute to health disparities for different cancer diagnoses, but they are not extensively studied for glioma patients. In this study socioeconomic status (SES), travel time to health care, cohabitation status, and region (northern Sweden compared to three regions in southern Sweden) were investigated in relation to prognosis for patients with glioma WHO grade I-IV. MATERIAL AND METHODS The Swedish National Quality Registry for Brain Tumors was used to identify 1276 patients with glioma WHO grade I-IV, diagnosed 2009-2013. The Swedish population-based database RISK North combines data from several health care and demographic registries through the unique personal identity number. The RISK North was used to study survival in relation to SES, cohabitation status (living alone vs living with another adult person), travel time to the closest regional hospital (i.e. the closest hospital with a neurosurgical unit), and region. Educational level was used as a proxy for SES. RESULTS In univariable survival analysis, patients with glioma WHO grade III-IV and high SES had a longer survival compared to patients with low SES (middle school (ref) HR:1, high school HR:0.67 CI[0.56-0.81], university/college HR:0.65 CI[0.53-0.79], p&amp;lt;0.0001). In the multivariable model for the same group, survival was longer for patients with higher SES (middle school (ref) HR:1, high school HR:0.81 CI[0.67-0.98], p=0.033; university/college HR:0.81 CI[0.66-1.00], p=0.048). For patients with glioma WHO grade I-IV, there were no significant differences in survival in relation to travel time, cohabitation status, or region in multivariable survival analysis. CONCLUSION Survival was significantly worse in patients with lower SES compared to higher SES for patients with glioma WHO grade III-IV. No significant differences were found in survival in relation to cohabitation status (between those living alone and those living with another adult person), travel time to regional hospital, or between the northern Sweden and three regions in southern Sweden.

Insufficient use of menopausal hormone therapy in Swedish women with early or premature menopause caused by bilateral oophorectomy: a register-based study.

To investigate the use of menopausal hormone therapy (MHT) in premenopausal women after bilateral oophorectomy. Retrospective register-based cohort study. Sweden. Swedish women aged 35-44 years without malignancy who underwent bilateral oophorectomy in 2005-2020 were identified using The Swedish National Quality Register of Gynaecological Surgery (GynOp). Data from GynOp were cross-linked with data on dispensed drugs extracted from the Swedish Prescribed Drug Register. Proportion of women dispensed MHT at least once within 1 year after surgery. Repeated treatment episodes were defined, and the proportion of 'person time' covered by dispensations was analysed. In total, 1231 of all women (n = 1706) were dispensed MHT at some point after surgery, with 1177 women dispensed MHT within 1 year. This proportion increased from 64% in 2005 to 84% in 2019 (p < 0.001). In the total population, 4537 'treatment years' transpired, corresponding to 43% of the mean time covered. In women dispensed MHT within 1 year, the proportion of time covered was 63%. Only 69% of all women without malignancy of any kind who underwent bilateral oophorectomy were dispensed MHT within 1 year after surgery, and the duration of treatment was limited. It is important to study further the reasons behind the low dispensation rate in this group to increase adherence to current treatment guidelines, improve quality of life, and avoid increased morbidity and mortality.

SALpingectomy for STERilisation (SALSTER): study protocol for a Swedish multicentre register-based randomised controlled trial

IntroductionSalpingectomy is currently suggested as an alternative to tubal ligation for sterilisation. Precursor lesions of ovarian carcinoma can be found in the fallopian tubes; thus, salpingectomy could possibly reduce the...

Physicians' assessment of complications after gynecological surgery in Sweden: The GYNCOM survey.

Complications after gynecological surgery in Sweden are registered in the well-established Swedish National Quality Register of Gynecological Surgery, GynOp. The aim of this study was to analyze interrater reliability in assessing complications according to the methods in GynOp, and to explore physicians' perceptions of registering complications. A digital survey was sent to gynecologists and residents in gynecology in Sweden. Participating clinics were recruited through the Swedish network for national clinical studies in Obstetrics and Gynecology, SNAKS. Twenty fictional cases, intended to represent normal postoperative course, failure to cure, and varying degrees of complications, were developed by the research group. The clinical scenarios included abdominal and laparoscopic surgery of the uterus and adnexa, vaginal hysterectomies, as well as hysteroscopy. The respondents graded each case on the presence of a complication (yes/no). Type of complication, severity, and what action the complication required according to Clavien-Dindo was registered if a complication was acknowledged, according to the method in GynOp. Interrater reliability and the opinions of the respondents were presented descriptively. More than 80% of respondents making the same assessment was considered as agreement. The response rate was 41%, with 104 responding physicians from 16 gynecological clinics. Type and severity of complication was considered relevant to register by 88% and 89% of respondents, respectively. Agreement on whether the case described a complication was >80% in 85% (17/20) of cases and agreement using the Clavien-Dindo classification was >90% in 80% (16/20) of cases. There was high agreement in assessments of classically severe complications, such as pulmonary embolism and ureteral damage, in both presence of complication and severity, as well as Clavien-Dindo (>90% for all methods). Cases with agreement <80% on whether the case described a complication were bordering between normal postoperative course and minor complication. This study provides validation for the methods used to register complications after gynecological surgery according to the GynOp register, including the use of Clavien-Dindo in gynecology. However, the results indicate a need to define what should be considered symptoms inherent to each type of surgery.