National Register-based Cohort Study Research Articles

Gender affirming treatment and employment rate in 3,812 Danish transgender persons and 38,120 controls.

Gender affirming care could be associated with higher employment rate. We assessed employment rates in transgender persons compared to controls and demographic, health and treatment-related factors associated with employment in transgender persons. National register-based cohort study in Danish persons with diagnosis code of gender dysphoria during year 2000-2021. Five age-matched controls of the same sex at birth and five age-matched controls of the other sex at birth were included. The date of study inclusion was the first date of transgender diagnosis. Employment was the primary study outcome. The cohort included 3,812 transgender persons and 38,120 cisgender controls. The median age (interquartile range) was 19 (15; 24) years for transgender men, n = 1,993 and 23 (19; 33) years for transgender women, n = 1,819. In transgender men compared to control cisgender women, the odds ratio (95% confidence interval) for employment was 0.33 (0.29; 0.38) before study inclusion and 0.24 (0.20; 0.29) in the fifth calendar year after index; in transgender women compared to control cisgender men, corresponding ORs were 0.30 (0.70; 0.34) and 0.21 (0.18; 0.25). Similar findings were found between transgender persons and cisgender controls of other sex. Use of gender affirming hormone in transgender men increased probability of employment at all time points with odds ratio after 5 years: 1.61 (1.08; 2.42), p = 0.02 (95% confidence interval). In transgender women, use of hormone treatment was not associated with changed employment rates, 5 years odds ratio 1.31 (0.94; 1.82), p = 0.11. Masculinizing hormone treatment was associated with higher probability of employment.

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.

Exploring variation in timely reperfusion treatment in ST-segment elevation myocardial infarction in Norway: a national register-based cohort study

ObjectivesThis study aimed to investigate determinants of reperfusion within recommended time limits (timely reperfusion) for ST-segment elevation myocardial infarction patients, exploring the impact of geography, patient characteristics and socio-economy.DesignNational register-based...

Learning curve and patient outcome in gallstone surgery - a national register-based cohort study

Learning curve and patient outcome in gallstone surgery - a national register-based cohort study

Intergenerational Transmission of Psychiatric Conditions and Psychiatric, Behavioral, and Psychosocial Outcomes in Offspring

Psychiatric conditions in parents are associated with many psychiatric and nonpsychiatric outcomes in offspring. However, it remains unknown whether this intergenerational transmission is attributable to broader psychopathology comorbidity or to specific conditions. To estimate associations between general and specific psychopathology factors in parents and a wide range of register-based outcomes in their offspring. This Swedish national register-based cohort study included 2 947 703 individuals born between 1970 and 2000 and followed up with participants through December 31, 2013. Statistical analysis was performed from October 2022 to October 2023. Hierarchical factor model consisting of 1 general and 3 specific psychopathology factors fit to 9 parental psychiatric diagnoses and violent criminal court convictions. A total of 31 outcomes were measured in offspring and sorted into 6 broad clusters: psychotic-like outcomes, neurodevelopmental outcomes, internalizing outcomes, externalizing outcomes, behavior and accidents, and psychosocial outcomes. Of 2 947 703 individuals, 1 518 252 (51.5%) were male, and the mean (SD) age at the end of follow-up was 28.7 (8.9) years. The general psychopathology factor in parents was significantly associated with all 31 offspring outcomes (range: odds ratio [OR] for accidents, 1.08 [95% CI, 1.07-1.08] to OR for social welfare recipiency, 1.40 [95% CI, 1.39-1.40]), which means that children whose parents scored 1 SD above the mean on the general psychopathology factor had an 8% to 40% higher odds of different studied outcomes. The specific psychotic factor in parents was primarily associated with all 5 psychotic-like outcomes (range: OR for prescription of antiepileptics, 1.05 [95% CI, 1.04-1.06] to OR for schizophrenia, 1.25 [95% CI, 1.23-1.28]) and the specific internalizing factor in parents was primarily associated with all 6 internalizing outcomes (range: OR for prescription of anxiolytics, 1.10 [95% CI, 1.09-1.10] to OR for depression, 1.13 [95% CI, 1.12-1.13]) and all 6 neurodevelopmental outcomes (range: OR for intellectual disability, 1.02 [95% CI, 1.01-1.03] to OR for autism spectrum disorder, 1.10 [95% CI, 1.09-1.11]) in offspring. The specific externalizing factor in parents was associated with all 6 externalizing outcomes (range: OR for violent crimes, 1.21 [95% CI, 1.19-1.23] to OR for oppositional defiant disorder, 1.32 [95% CI, 1.32-1.33]) and all 6 internalizing outcomes (range: OR for obsessive-compulsive disorder, 1.01 [95% CI, 1.00-1.02] to OR for posttraumatic stress disorder, 1.13 [95% CI, 1.12-1.13]) in offspring. This cohort study of the Swedish population suggests that the intergenerational transmission of psychiatric conditions across different types of spectra may largely be attributable to a parental general psychopathology factor, whereas specific factors appeared to be primarily responsible for within-spectrum associations between parents and their offspring. Professionals who work with children (eg, child psychologists, psychiatrists, teachers, and social workers) might benefit from taking the total number of parental psychiatric conditions into account, regardless of type, when forecasting child mental health and social functions.

Polycystic ovary syndrome and risk of pre-eclampsia: A national register-based cohort study.

To explore whether the association between polycystic ovary syndrome (PCOS) and pre-eclampsia depends on treated clinical hyperandrogenism and whether PCOS is associated with different subtypes of pre-eclampsia. Nationwide register-based cohort study. Sweden. Nulliparous women with PCOS (n = 22 947) and non-PCOS controls (n = 115 272) giving singleton birth at ≥22 gestational weeks during 1997-2015. Treated clinical hyperandrogenism was defined as filled prescriptions of anti-androgenic drugs during 2005-2017 (n = 2301 among PCOS women). The risk of pre-eclampsia was estimated with conditional logistic regression, expressed as adjusted odds ratio (OR) with 95% confidence interval (CI). Adjustments were performed individually for confounders and predictors. Overall pre-eclampsia. Early/late (delivery <34/≥34 weeks) pre-eclampsia. Pre-eclampsia with or without a small-for-gestational-age (SGA) infant. Compared with controls, women with PCOS had a 29% increased risk of pre-eclampsia (predictor adjusted OR 1.29, 95% CI 1.20-1.39), with similar risk estimates for PCOS women with and without treated clinical hyperandrogenism. The association between PCOS and early pre-eclampsia seemed stronger than its association with late pre-eclampsia (predictor adjusted OR 1.64 (95% CI 1.33-2.02) and 1.26 (95% CI 1.17-1.37). Additionally, the association seemed slightly stronger between PCOS and pre-eclampsia in women with an SGA infant than without. Women with PCOS face an increased risk for pre-eclampsia, especially early pre-eclampsia and pre-eclampsia with an SGA infant. We were unable to determine on the basis of available data, whether hyperandrogenism is associated with pre-eclampsia.

A short length of hospital stay is not associated with risk of readmission among hip fracture patients – a Swedish national register-based cohort study

BackgroundHospital length of stay (LoS) after a hip fracture likely mirrors health status; however, a too short hospitalization might increase the risk of readmission. In this national register-based study, we investigated the association between LoS after a hip fracture and the risk of readmissions.Methods73,551 patients with a first hip fracture between 2012 and 2019 were followed for 4 months after discharge. LoS was categorized by cubic splines and the association with readmissions was analyzed with Cox regression models.ResultsThe mean LoS was 11 ± 6 days and 25% of the study population had at least one readmission. Compared to the mean LoS of 9–12 days, there was a 18% decreased risk of readmission for LoS of 2–4 days (HR 0.82 [95% CI 0.77–0.87]) and 13% decrease for 5–8 days (HR 0.87 [95% CI 0.83–0.91]), when adjusting for sex, age, walking ability, ASA score, CCI, complications during hospitalization and living arrangements. For longer LoS, risk of readmission increased (13–23 days: HR 1.09 [95% CI 1.05–1.13] and 24 + days: HR 1.19 [95% CI 1.11–1.28]). The results were robust across sex, age, and living arrangements. The most common specific reasons for readmission were trauma/injury, cardiovascular and complications, and the proportions did not differ considerably between short and long LoS-categories.ConclusionsWhile a long LoS can be explained by the care need of the patient, a short LoS - compared to the average stay - does not increase the risk of readmission regardless of health status and hospital complications in a Swedish setting.

Socioeconomic factors and long-term mortality risk after surgical aortic valve replacement

BackgroundThere is scarce knowledge about the association between socioeconomic status and mortality in patients undergoing surgical aortic valve replacement. This study explores the associations between income, education and marital status, and long-term mortality risk. MethodsIn this national registry-based observational cohort study we included all 14,537 patients aged >18 years who underwent isolated surgical aortic valve replacement for aortic stenosis in Sweden 1997–2020. Socioeconomic status and comorbidities were collected from three mandatory national registries. Cox regression models adjusted for patient characteristics and comorbidities were used to estimate the mortality risk. ResultsMortality risk was higher for patients in the lowest versus the highest income quintile (adjusted hazard ratio [aHR] 1.36, 95 % confidence interval [CI]: 1.11–1.65), for patients with <10 years education versus >12 years (aHR 1.20, 95 % CI:1.08–1.33), and for patients who were not married/cohabiting versus those who were (aHR 1.24, 95 % CI:1.04–1.48). Patients with the most unfavorable socioeconomic status (lowest income, shortest education, never married/cohabiting) had an adjusted median survival of 2.9 years less than patients with the most favorable socioeconomic status (14.6 years, 95 % CI: 13.2–17.4 years vs. 11.7 years, 95 % CI: 9.8–14.4). ConclusionsLow socioeconomic status in patients undergoing surgical aortic valve replacement is associated with shorter survival and an increased long-term adjusted mortality risk. These results emphasize the importance of identifying surgical aortic valve replacement patients with unfavorable socioeconomic situation and ensure sufficient post-discharge surveillance.

Increased risk of hospitalization, intensive care and death due to COVID-19 in patients with adrenal insufficiency: A Swedish nationwide study.

Patients with adrenal insufficiency (AI) have excess morbidity and mortality related to infectious disorders. Whether patients with AI have increased morbidity and mortality from COVID-19 is unknown. In this linked Swedish national register-based cohort study, patients with primary and secondary AI diagnosis were identified and followed from 1 January 2020 to 28 February 2021. They were compared with a control cohort from the general population matched 10:1 for age and sex. The following COVID-19 outcomes were studied: incidence of COVID-19 infection, rates of hospitalization, intensive care admission and death. Hazard ratios (HR) with 95% confidence intervals (95% CI) adjusted for socioeconomic factors and comorbidities were estimated using Cox regression analysis. We identified 5430 patients with AI and 54,300 matched controls: There were 47.6% women, mean age was 57.1 (standard deviation 18.1) years, and the frequency of COVID-19 infection was similar, but the frequency of hospitalization (2.1% vs. 0.8%), intensive care (0.3% vs. 0.1%) and death (0.8% vs. 0.2%) for COVID-19 was higher in AI patients than matched controls. After adjustment for socioeconomic factors and comorbidities, the HR (95% CI) was increased for hospitalization (1.96, 1.59-2.43), intensive care admission (2.76, 1.49-5.09) and death (2.29, 1.60-3.28). Patients with AI have a similar incidence of COVID-19 infection to a matched control population, but a more than twofold increased risk of developing a severe infection or a fatal outcome. They should therefore be prioritized for vaccination, antiviral therapy and other appropriate treatment to mitigate hospitalization and death.

OR30-06 Hospitalisation, Intensive Care And Death Due To COVID-19 In Swedish Patients With Adrenal Insufficiency

Abstract Disclosure: R. Bergthorsdottir: None. D. Esposito: None. G. Johannsson: None. O. Ragnarsson: None. P. Dahlqvist: None. S. Bensing: None. J. Nåtman: None. F. Nyberg: None. Background: Patients with adrenal insufficiency (AI) have increased risk for morbidity and mortality related to infectious disorders. Whether patients with AI have an increased risk for infection with Coronavirus disease 2019 (COVID-19), need of hospitalisation, intensive care or death in COVID-19 disease is still unknown. Methods: Swedish national register-based cohort study. Patients with primary and secondary AI were identified in linked Swedish national healthcare registers and followed from 2020-01-01 until 2021-02-28, and were compared to controls from the general population, matched 10:1 for age and sex. The following COVID-19 outcomes were studied: hospitalisation, intensive care and death. Findings: We identified 5430 patients with AI, and 54300 controls; 47.6% females, with a mean (±SD) age of 57.1 (±18.1) years. The prevalence of positive COVID-19 testing and diagnosis were similar in patients with AI and controls. The rate of hospitalisation (2.1% vs 0.8%), intensive care (0.3% vs 0.1%) and death (0.8% vs 0.2%) for COVID-19 were higher in AI patients than controls, respectively. After adjustment for socioeconomic factors and comorbidities, the hazard ratio (95% confidence interval) for hospitalisation was 1.96 (1.59-2.43), for intensive care admission it was 2.76 (1.49-5.09) and for death 2.29 (1.60-3.28). Interpretation: Patients with AI have an increased risk for severe and fatal COVID-19 infection and should therefore be prioritised for vaccination, early antiviral and supportive treatment to prevent hospitalisation and death. Presentation: Sunday, June 18, 2023

Gender-affirming treatment and mental health diagnoses in Danish transgender persons: a nationwide register-based cohort study.

Gender affirming treatment aims to improve mental health. To investigate longitudinal mental health outcomes in Danish transgender persons. National register-based cohort study in Danish transgender persons with diagnosis code of "gender identity disorder" during the period 2000-2021. Five age-matched controls of the same sex at birth and five age-matched controls of the other sex at birth were included for each transgender person. Diagnosis codes of mental and behavioral disorders and/or prescription of psychopharmacological agents until June 2022. The cohort included 3812 transgender persons with median age (interquartile range) 19 (15; 24) years for persons assigned female at birth (AFAB, N = 1993) and 23 (19; 33) years for persons assigned male at birth (AMAB, N = 1819) and 38 120 controls. Follow up duration was up to 10 years with mean (standard deviation) 4.5 (4.3) years. In transgender persons AFAB compared to control women, the odds ratio (OR) (95% confidence interval) for mental and behavioral disorders was 6.7 (5.5; 8.1) before the index date, 9.9 (8.4; 11.7) at 1 year, 5.8 (4.4; 7.7) at 5 years, and 3.4 (2.1; 7.5) at 8 years follow up. In transgender persons AMAB compared to control men, corresponding ORs were 5.0 (4.0; 6.4), 11.3 (9.3; 13.7), 4.8 (3.5; 6.5), and 6.6 (4.2; 10.3) at 8 years follow up (all P < .001). The OR for mental health disorders was higher in transgender persons compared to controls and remained elevated throughout follow up, especially in transgender persons AMAB.

Five-Year Incidence of Proliferative Diabetic Retinopathy and Associated Risk Factors in a Nationwide Cohort of 201 945 Danish Patients with Diabetes.

To evaluate the proliferative diabetic retinopathy (PDR) progression rates and identify the demographic and clinical characteristics of patients who later developed PDR compared with patients who did not progress to that state. A national 5-year register-based cohort study including 201 945 patients with diabetes. Patients with diabetes who had attended the Danish national screening program (2013-2018) for diabetic retinopathy (DR). We used the first screening episode as the index date and included both eyes of patients with and without subsequent progression of PDR. Data were linked with various national health registries to investigate relevant clinical and demographic parameters. The International Clinical Retinopathy Disease Scale was used to classify DR, with no DR as level 0, mild DR as level 1, moderate DR as level 2, severe DR as level 3, and PDR as level 4. Hazard ratios (HRs) for incident PDR for all relevant demographic and clinical parameters and 1-, 3-, and 5-year incidence rates of PDR according to baseline DR level. Progression to PDR within 5 years was identified in 2384 eyes of 1780 patients. Proliferative diabetic retinopathy progression rates from baseline DR level 3 at 1, 3 and 5 years were 3.6%, 10.9%, and 14.7%, respectively. The median number of visits was 3 (interquartile range, 1-4). Progression to PDR was predicted in a multivariable model by duration of diabetes (HR, 4.66 per 10 years; 95% confidence interval [CI], 4.05-5.37), type 1 diabetes (HR, 9.61; 95% CI, 8.01-11.53), a Charlson Comorbidity Index score of > 0 (score 1: HR, 4.62; 95% CI, 4.14-5.15; score 2: HR, 2.28; 95% CI, 1.90-2.74; score ≥ 3: HR, 4.28; 95% CI, 3.54-5.17), use of insulin (HR, 5.33; 95% CI, 4.49-6.33), and use of antihypertensive medications (HR, 2.23; 95% CI, 1.90-2.61). In a 5-year longitudinal study of an entire screening nation, we found increased risk of PDR with increasing baseline DR levels, longer duration of diabetes, type 1 diabetes, systemic comorbidity, use of insulin, and blood pressure-lowering medications. Most interestingly, we found lower risk of progression from DR level 3 to PDR compared with that in previous studies. Proprietary or commercial disclosure may be found after the references.

Longitudinal bidirectional associations between diabetic retinopathy and diagnosed depression: Results from a Danish nationwide registry-based cohort study

ObjectiveDiabetic retinopathy (DR) is a feared complication and a leading course of visual impairment, but the connection between DR and depression including the direction has never been studied in a nationwide cohort. We aimed to assess, whether the associations between DR and diagnosed depression are bidirectional. MethodsWe performed a national register-based cohort study of individuals with type 2 diabetes, who attended diabetic eye screening between January 2013 and June 2022. Level of DR was extracted from the Danish Registry of Diabetic Retinopathy. The severity of DR was assessed according to the International Clinical Diabetic Retinopathy severity scale. Diagnosed depression was ascertained by physician diagnostic codes of unipolar depression (F32), recurrent depression (F33) or dysthymia (F34.1) from the Danish National Patient Register. We estimated presence of diagnosed depression according to DR level at index date and risk of diagnosed depression during follow-up using multivariable logistic and Cox regression, respectively. Secondly, we assessed whether diagnosed depression at index date could predict incident DR. ResultsWe included 240,893 individuals with type 2 diabetes with baseline rates of diagnosed depression ranging from 5.2 to 6.0 % for DR level 1–4. At index date, individuals with type 2 diabetes and DR were less likely to have a history of diagnosed depression (multivariable adjusted OR, 0.77 [95 % CI 0.73–0.82]). In 226,523 individuals with type 2 diabetes followed for 1,159,755 person-years, 1.7 % developed at least one episode of diagnosed depression.In a model adjusted for age and sex, individuals with DR at index date had an increased risk of incident diagnosed depression compared to those without DR (HR 1.25 [95 % CI 1.16–1.36]). Adjusting for marital status, use of glucose-, lipid- and blood pressure lowering medication, HbA1c, diabetic neuropathy and Charlson comorbidity index waived the above risk (multivariable adjusted HR 1.02 [95 % CI 0.93–1.12]).Furthermore a previous history of diagnosed depression was not associated with increased risk of incident DR (multivariable adjusted HR 0.89 [95 % CI 0.77–1.03]). ConclusionIn this nationwide cohort study, individuals with DR at first screening were 23 % less likely to have a history of depression, but our data did not support a bidirectional association between DR and depression. Selection bias may have occurred as diagnosed depression is a known barrier for attending DR-screening.

Less Invasive Primary Treatment for Colorectal Cancer After Implementation of National Screening: A Nationwide Cohort Study.

The effect of organized colorectal cancer (CRC) screening on type of primary treatment remains sparsely investigated. This study evaluated the difference in primary treatment strategy between patients diagnosed with screen-detected (SD-CRC) and non-screen-detected colorectal cancer (NSD-CRC) in a national CRC screening program. This was a retrospective national register-based cohort study. Data on patients aged between 50 and 75years and diagnosed with SD-CRC or NSD-CRC were retrieved from the national colorectal cancer screening database and the Danish Colorectal Cancer Group database. Outcomes related to surgical invasiveness were compared between the two cohorts. Differences were expressed as relative risks using log-binomial generalized linear regression models. UICC stage IV specific outcomes were analyzed using the same method. All analyses were adjusted for sex, age, type of cancer (colonic/rectal), and Charlson comorbidity index. The study included 4707 patients with SD-CRC and 7328 with NSD-CRC. Therapeutic flexible endoscopy (SD-CRC: n = 636 vs. NSD-CRC: n = 334, RR: 2.50, P < 0.001), (robotic-assisted) laparoscopic resection ((n = 616 vs. n = 773, RR: 1.27, P < 0.001), n = 2759 vs. n = 3471, RR: 1.11, P < 0.001), and radical resection (n = 3890 vs. n = 4834, RR: 1.02, P = 0.002) were significantly more frequent in the SD-CRC group. The rates of emergency priority (n = 32 vs. n = 562, RR: 0.09, P < 0.001), open surgery (n = 391 vs. n = 1410, RR: 0.53, P < 0.001), supplementary organ resection (n = 259 vs. n = 860, RR: 0.56, P < 0.001), and stoma formation (n = 526 vs. n = 1040, RR: 0.89, P = 0.007) were significantly lower in the SD-CRC group. The rate of patients undergoing surgery with UICC stage IV disease was significantly higher in the SD-CRC group (SD-CRC: n = 262, NSD-CRC: n = 994, RR: 1.43, P < 0.001). SD-CRC remained associated with less invasive primary surgical treatment following adjustment for potential healthy user bias. UICC stage IV disease may be less advanced in patients with SD-CRC.

No Association Between Previous General Infection and Prosthetic Joint Infection After Total Hip Arthroplasty—A National Register-Based Cohort Study on 58,449 Patients Who Have Osteoarthritis

BackgroundProsthetic joint infection (PJI) following total hip arthroplasty (THA) is a complication associated with increased risk of death. There is limited knowledge about the association between infection before THA, and risk of revision due to PJI. We investigated the association between any previous hospital-diagnosed or community-treated infection 0 to 6 months before primary THA and the risk of revision. MethodsWe obtained data on 58,449 patients who were operated with primary unilateral THA between 2010 and 2018 from the Danish Hip Arthroplasty Register. Information on previous infection diagnoses, redeemed antibiotic prescriptions up to 1 year before primary THA, intraoperative biopsies, and cohabitations was retrieved from Danish health registers. All patients had a 1-year follow-up. Primary outcome was revision due to PJI. Secondary outcome was any revision. We calculated the adjusted relative risk with 95% confidence intervals (CI), treating death as competing risk. ResultsAmong 1,507 revisions identified, 536 were due to PJI with a cumulative incidence of 1.0% ([CI] 0.9 to 1.2) and 0.9% ([CI] 0.8 to 1.0) for patients who did and did not have previous infection. For any revision, the cumulative incidence was 3.1% ([CI] 2.9 to 3.4) and 2.4% ([CI] 2.3 to 2.6) for patients who did and did not have previous infection. The adjusted relative risk for PJI revision was 1.1 ([CI] 0.9 to 1.4) and for any revision 1.3 ([CI] 1.1 to 1.4) for patients who did have previous infection compared to those who did not. ConclusionPrevious hospital-diagnosed or community-treated infection 0 to 6 months before primary THA does not increase the risk of PJI revision. It may be associated with increased risk of any revision.

Measuring the Impact of ICU Strain on Mortality, After-Hours Discharge, Discharge Delay, Interhospital Transfer, and Readmission in Australia With the Activity Index.

ICU resource strain leads to adverse patient outcomes. Simple, well-validated measures of ICU strain are lacking. Our objective was to assess whether the "Activity index," an indicator developed during the COVID-19 pandemic, was a valid measure of ICU strain. Retrospective national registry-based cohort study. One hundred seventy-five public and private hospitals in Australia (June 2020 through March 2022). Two hundred seventy-seven thousand seven hundred thirty-seven adult ICU patients. None. Data from the Australian and New Zealand Intensive Care Society Adult Patient Database were matched to the Critical Health Resources Information System. The mean daily Activity index of each ICU (census total of "patients with 1:1 nursing" + "invasive ventilation" + "renal replacement" + "extracorporeal membrane oxygenation" + "active COVID-19," divided by total staffed ICU beds) during the patient's stay in the ICU was calculated. Patients were categorized as being in the ICU during very quiet (Activity index < 0.1), quiet (0.1 to < 0.6), intermediate (0.6 to < 1.1), busy (1.1 to < 1.6), or very busy time-periods (≥ 1.6). The primary outcome was in-hospital mortality. Secondary outcomes included after-hours discharge from the ICU, readmission to the ICU, interhospital transfer to another ICU, and delay in discharge from the ICU. Median Activity index was 0.87 (interquartile range, 0.40-1.24). Nineteen thousand one hundred seventy-seven patients died (6.9%). In-hospital mortality ranged from 2.4% during very quiet to 10.9% during very busy time-periods. After adjusting for confounders, being in an ICU during time-periods with higher Activity indices, was associated with an increased risk of in-hospital mortality (odds ratio [OR], 1.49; 99% CI, 1.38-1.60), after-hours discharge (OR, 1.27; 99% CI, 1.21-1.34), readmission (OR, 1.18; 99% CI, 1.09-1.28), interhospital transfer (OR, 1.92; 99% CI, 1.72-2.15), and less delay in ICU discharge (OR, 0.58; 99% CI, 0.55-0.62): findings consistent with ICU strain. The Activity index is a simple and valid measure that identifies ICUs in which increasing strain leads to progressively worse patient outcomes.

Real-world effectiveness of pharmacological treatments for bipolar disorder: register-based national cohort study.

Pharmacological treatment patterns for bipolar disorder have changed during recent years, but for better or worse? To investigate the comparative real-world effectiveness of antipsychotics and mood stabilisers in bipolar disorder. Register-based cohort study including all Finnish residents aged 16-65 with a diagnosis of bipolar disorder from in-patient care, specialised out-patient care, sickness absence and disability pensions registers between 1996 and 2018, with a mean follow-up of 9.3 years (s.d. = 6.4). Antipsychotic and mood stabiliser use was modelled using the PRE2DUP method and risk for hospital admission for psychiatric and non-psychiatric reasons when using versus not using medications was estimated using within-individual Cox models. Among 60 045 individuals (56.4% female; mean age 41.7 years, s.d. = 15.8), the five medications associated with lowest risk of psychiatric admissions were olanzapine long-acting injection (LAI) (aHR = 0.54, 95% CI 0.37-0.80), haloperidol LAI (aHR = 0.62, 0.47-0.81), zuclopenthixol LAI (aHR = 0.66, 95% CI 0.52-0.85), lithium (aHR = 0.74, 95% CI 0.71-0.76) and clozapine (aHR = 0.75, 95% CI 0.64-0.87). Only ziprasidone (aHR = 1.26, 95% CI 1.07-1.49) was associated with a statistically higher risk. For non-psychiatric (somatic) admissions, only lithium (aHR = 0.77, 95% CI 0.74-0.81) and carbamazepine (aHR = 0.91, 95% CI 0.85-0.97) were associated with significantly reduced risk, whereas pregabalin, gabapentin and several oral antipsychotics, including quetiapine, were associated with an increased risk. Results for a subcohort of first-episode patients (26 395 individuals, 54.9% female; mean age 38.2 years, s.d. = 13.0) were in line with those of the total cohort. Lithium and certain LAI antipsychotics were associated with lowest risks of psychiatric admission. Lithium was the only treatment associated with decreased risk of both psychiatric and somatic admissions.

Parental death and initiation of antidepressant treatment in surviving children and youth: a national register-based matched cohort study.

Population-based longitudinal studies on bereaved children and youth's mental health care use are scarce and few have assessed the role of surviving parents' mental health status. Using register data of individuals born in Sweden in 1992-1999, we performed a matched cohort study (n=117,518) on the association between parental death and subsequent initiation of antidepressant treatment among individuals bereaved at ages 7-24 years. We used flexible parametric survival models to estimate the hazard ratios (HRs) over time after bereavement, adjusting for individual and parental factors. We further examined if the association varied by age at loss, sex, parental sociodemographic factors, cause of death, and the surviving parents' psychiatric care. The bereaved were more likely to initiate antidepressants treatment than the nonbereaved matched individuals during follow-up (incidence rate per 1000 person years 27.5 [26.5-28.5] vs. 18.2 [17.9-18.6]). The HRs peaked in the first year after bereavement and remained higher than the nonbereaved individuals until the end of the follow-up. The average HR over the 12 years of follow-up was 1.48 (95% confidence interval [1.39-1.58]) for father's death and 1.33 [1.22-1.46] for mother's death. The HRs were particularly high when the surviving parents received psychiatric care before bereavement (2.11 [1.89-2.56] for father's death; 2.14 [1.79-2.56] for mother's death) or treated for anxiety or depression after bereavement (1.80 [1.67-1.94]; 1.82 [1.59-2.07]). The risk of initiating antidepressant treatment was the highest in the first year after parental death and remained elevated over the next decade. The risk was particularly high among individuals with surviving parents affected by psychiatric morbidity. The Swedish Research Council.

Risk of suicide and self-harm in university students entering different university programs - a national register-based cohort study in Sweden.

It is not known whether the elevated suicide risk in certain occupations, such as health care professionals, is partly attributable to a selection of individuals with prior vulnerability. We aimed to determine the risk of suicide and self-harm already in students entering different university programs. We used national registers to identify 621,218 Swedish residents aged 18-39years with registration for a university program 1993-2013. Outcomes were suicide and self-harm within three years. We applied logistic regression analyses to calculate odds ratios (OR) and 95% confidence intervals (CI) of risk of suicide and self-harm, with the Education program category as a reference. Results were adjusted for sex, age, time period and for history of hospitalization due to mental disorder or self-harm, as a measure of previous vulnerability. In the second step, we stratified results by sex. There was a higher risk of suicide (OR 2.4) in female nursing students and natural science students (OR 4.2) and of self-harm in female and male Nursing/Health care students (OR range 1.2 -1.7). Subcategorization into nursing students only strengthened the association with self-harm for both sexes. Prior vulnerability did not fully explain the increased risk. The elevated risk of suicide in nursing and health care occupations partly has its onset in vulnerability factors present before or emerging during university studies. Increased efforts in identifying and treating mental disorders and preventing self-harm in university students could be an important step in preventing future suicides.

Disease-modifying therapies and cost-of-illness progression among people newly diagnosed with multiple sclerosis: a national register-based cohort study covering treatment initiation with interferons, glatiramer acetate or natalizumab

ObjectivesDisease-modifying therapies (DMTs) can slow disease progression in multiple sclerosis (MS). The objective of this study was to explore the cost-of-illness (COI) progression among newly diagnosed people with MS in...