Criterion Validity Research Articles

Reliability and validity of the Turkish version of the Aging Voice Index

Purpose The Ageing Voice Index is a valid and reliable tool for assessing the impact of changes in the voice of older adults. Our aim is to adapt the Aging Voice Index with Turkish older adults and test its reliability and validity to create the Turkish Aging Voice Index. Method A total of 206 participants were included in the study. Construct validity, criterion validity, test-retest reliability, internal consistency, and confirmatory factor analysis were investigated. Finally, the sensitivity and specificity of the Turkish Aging Voice Index were calculated using receiver operating characteristics curve analysis. Result The Turkish Aging Voice Index has excellent internal consistency (Cronbach’s alpha= 0.971). A high intraclass correlation for test-retest reliability was found (ICC = 0.953, p < 0.001). Construct validity of the Turkish Aging Voice Index was found to be statistically significant (p < 0.001) by comparing the mean Turkish Aging Voice Index scores between the study and control groups. For criterion validity, a statistically positive high correlation was found between the mean scores of the Turkish Aging Voice Index and the Turkish version of the Voice Handicap Index-10 (r = 0.854, p < 0.001). The cut-off value of the Turkish Aging Voice Index was 15.50 with a sensitivity of 85.01% and a specificity of 84.8%. Conclusion The Turkish Aging Voice Index is a valid and reliable tool for elderly patients with voice disorders. A score >15.50 is an indicator of voice problems in the older population.

The Development of a Food Frequency Questionnaire for the Assessment of Ultra-Processed Food Consumption in the Italian Adult Population: Protocol for a Validity and Reproducibility Study

Background: Over the last decade, while studies on the detrimental effects of ultra-processed food (UPF) consumption have increased, methodological limitations on the quality of available evidence have emerged. Starting from a critical reassessment of the NOVA classification, this project will aim to develop and validate a food frequency questionnaire (FFQ), which is based on the processing of consumed foods and specifically designed to estimate the UPF consumption and total dietary intake of macro- and micronutrients in the Italian adult population. Methods: This study will take place in selected workplaces and include healthy males and females aged ≥18 years, residing in Italy and with Italian citizenship. The FFQ will be online, voluntary, self-administered, semi-quantitative, and designed to assess food intake over the past year and distinguish between industrial, artisanal, and home-made products. This project will consist of two phases. First, a pilot study will be conducted to obtain the final version of the FFQ. The current food consumption of the target population will be investigated, through a 24 h dietary recall, and the face validity of the new tool will be tested. The second phase will involve at least 436 participants. To assess reproducibility, the FFQ will be administered twice (at an interval of 3–10 months), and the test–retest method will be used. A 7-day weighed dietary record (WDR) will also be completed after each FFQ administration. To evaluate criterion validity, data from the two WDRs will be compared against those from the first FFQ administration. Conclusions: The results will provide a new valid tool focused on food processing, potentially useful for future studies.

Reliability and Criterion Validity of Physio Master Application for the Measurement of Cervical Range of Motion in Healthy Individuals

Reliability and Criterion Validity of Physio Master Application for the Measurement of Cervical Range of Motion in Healthy Individuals

Assessing Whether Negative Parenting Cognitions Bias Parent Report of Preschoolers' Externalizing Symptoms: A Regularized Moderated Non-Linear Factor Analysis Approach.

Parent report is frequently used to assess children's psychopathology, however, researchers have expressed concerns about the validity of parent reports. Some parental characteristics, attitudes, or beliefs may systematically bias a parent's report of their child's behaviors and functioning. Informed by social information processing models of parenting risk, parents with more difficulties reflecting on and interpreting their children's behavior may be at risk for less accurate reports. The present study conducted two regularized moderated non-linear factor analyses with LONGSCAN data to examine how parents' self-reported negative parenting cognitions were associated with structural parameters of parent-reported child aggression and attention problems. While differential item functioning (DIF) was present on the aggression and attention problems subscales as a function of negative parenting cognitions, the DIF was small in magnitude, inconsistent in directionality and did not significantly alter factor-level parameters. Negative parenting cognitions did demonstrate a small but significant negative impact on all latent externalizing factors (aggression and attention problems), such that caregivers with fewer negative parenting cognitions endorsed fewer items, and this was associated with a lower mean of each latent variable. Given that accounting for DIF did not contribute to meaningful differences in impact parameters or improve criterion validity, findings suggest that the aggression and attention subscales are functionally invariant to negative parenting cognitions, suggesting that externalizing symptoms can be reliability compared across parents of varying parenting cognitions.

Validity and reliability of the Polish adaptation of the work-related sense of coherence scale.

Work-related sense of coherence (Work-SoC) is defined as the perceived comprehensibility, manageability and meaningfulness of an individual's work situation. The purpose of this study was to investigate the factor structure, invariance, reliability, and validity of the Polish version of the Work-SoC Scale. The research was carried out between September and November 2023 in a diverse sample of employees. Factor structure, internal consistency, and measurement equivalence analysis were performed on sample N1 = 622. Criterion validity was checked on sample N2 = 255. Temporal stability was checked on sample N3 = 60 using the test-retest method. A three-factor solution was the best fit for the data, and invariant across sex, age, occupational group, and education. The Work-SoC was strongest in white-collar workers. Strength of Work-SoC was positively related to seniority (r = 0.23, p < 0.001). The reliability of the Work-SoC Scale was high (α = 0.84, ω = 0.84). Work-SoC was positively correlated with general SoC (r = 0.36, p < 0.001) and job satisfaction (r = 0.50, p < 0.001), and negatively correlated with job burnout (r = -0.32, p < 0.001). The temporal stability of the measurement for the overall scale was high (r = 0.80, p < 0.001). The Polish adaptation of the Work-SoC Scale has an identical structure and is as reliable as the original version. The high criterion validity, measurement stability, and the invariant structure of the scale by sex, age, occupational group, and education suggest that the Work-SoC Scale is a valuable tool for future research on employee health.

The Spiritual Psychological Robustness Scale (SPRS): A New Measure for Assessing Spiritual and Psychological Strength in the Context of Turkish Culture.

This study introduces the spiritual psychological resilience scale (SPRS), a newly developed instrument designed to assess the integration of spiritual beliefs with psychological resilience in the Turkish context. The scale assesses the manner in which individuals draw upon spiritual resources to cope with adversity and maintain psychological well-being. Exploratory and confirmatory factor analyses identified a three-factor structure. Spiritual coping, spiritual beliefs and spiritual commitment collectively account for 55.01% of the variance. The scale exhibited robust internal consistency across all subscales, with Cronbach's alpha coefficients ranging from 0.785 to 0.854, thereby substantiating its reliability. Furthermore, the scale exhibited a notable negative correlation with spiritual contradiction, thereby substantiating its criterion validity. The SPRS provides a comprehensive instrument for evaluating spiritual and psychological resilience and is applicable to diverse populations. Future research should investigate its utility across different demographic and cultural groups, as well as its relevance to other psychological constructs such as depression and anxiety. This scale has the potential for use in counselling, educational and clinical settings, particularly for populations dealing with trauma and adversity.

Criterion-Related Validity and Reliability of the Six-Minute Run Walk Test Among Children: Findings from a Systematic Review and Meta-Analysis

ABSTRACT The aim of this study is to examine the available scientific evidence on the reliability and criterion validity of 6-minute run walk field-based test when administered to children and adolescents. Systematic searches were performed in three electronic databases (MEDLINE/PubMed, SPORTDiscuss and Scopus) from their inception until February 2024, with an update on August 15, 2024. Studies were considered eligible if they provided information on the criterion-related validity and/or reliability of the 6-minute run walk test when conducted by children (aged 12 years and under) and/or adolescents (aged 13 to 17 years). To examine reliability and validity, two separate meta-analyses were implemented. In the meta-analysis focused on criterion-related validity, the five studies included indicated a fair validity (r = 0.56 [95% CI: 0.44–0.66]) and high homogeneity (I2 0%). In the meta-analysis focused on reliability, the pooled data from the five studies employing Pearson’s correlation coefficient (n = 585) revealed strong reliability values (r = 0.82 [95% CI: 0.75–0.87]), albeit with a moderate level of heterogeneity (I2 71% prediction interval 0.55–0.94). The evidence suggests that the 6-minute run walk field-based test demonstrated fair criterion-related validity and strong test-retest reliability when conducted with children and adolescent.

Evaluation of the measurement properties of intimate partner violence screening instruments for the general population: A COSMIN-based international systematic review.

To systematically appraise, compare, and summarize the measurement properties of intimate partner violence screening instruments for the general population and provide recommendations. We searched PubMed, Embase, Web of Science, ProQuest Dissertations & Theses Global and EBSCO Psychology Behavioral Sciences Collection from their establishment to March 2024 using systematic search strategies. The methodological quality of the instruments that met the inclusion criteria and their measurement properties were assessed using the COSMIN methodology, and the COSMIN recommendations were followed. We reported this study using PRISMA 2020 checklist. A total of 23 studies were eventually included, and 18 instruments were identified. The evaluation of the methodological quality indicates poor content validity but good structural validity; however, that of the criterion validity in most of the studies was inadequate. Measurement error and responsiveness were not assessed. Four screening instruments could be used in the interim. The remaining 14 instruments were not recommended for use. The overall methodological quality of most of the assessed instruments was insufficient. A rigorous intimate partner violence screening instrument with good measurement properties is urgently required to identify and screen for intimate partner violence in the general population. CRD42022365247.

Validation and psychometric properties of the bipolar prodrome symptom interview and scale-full prospective Chinese version to assess individuals at risk for bipolar disorder.

Bipolar disorder (BD) is a chronic, severe mental illness with a significant socio-economic burden. The early recognition of BD requires reliable and valid instruments. We evaluated the psychometric attributes of the Bipolar Prodrome Symptom Interview and Scale-Full Prospective (BPSS-FP)-Chinese version. Altogether, 129 participants, aged 16-35 years meeting DSM-5 criteria for major depressive disorder (MDD, n = 27) or BD (n = 76), and 26 healthy controls were recruited. Subjects were evaluated with the BPSS-FP Chinese version, Young Mania Rating Scale (YMRS), Montgomery-Asberg Depression Rating Scale (MADRS), and Cyclothymic-Hypersensitive Temperament questionnaire (CHT). Internal consistency, interrater reliability, criterion validity, and discriminant validity of the BPSS-FP-Chinese version were assessed. Cronbach alpha indices were 0.87, 0.86, and 0.66 for the manic, depressive, and general subscales of BPSS-FP-Chinese version, respectively. Interrater correlation was high, with total agreements of 0.94, 0.95, and 0.94 for the manic, depressive, and general index, respectively. Significant correlations (r ≥ 0.50) were noted between the BPSS-FP manic subscale and both the YMRS and CHT, the depressive subscale and the MADRS, and the general symptom subscale and the CHT. Moderate correlations were detected between the BPSS-FP general symptoms and both the YMRS and CHT (r = 0.40 ~ <0.50). Furthermore, the BPSS-FP mania index demonstrated a moderate correlation with the MADRS, while the depression index had a small correlation with the YMRS (r = 0.10 ~ <0.40). The BPSS-FP-Chinese version has good psychometric properties and can be applied in both clinical and research settings for screening subjects with a risk for BD.

Clinical Tools to Assess Functional Capacity During Risk Assessment Before Elective Noncardiac Surgery : A Scoping Review.

Functional capacity is critical to preoperative risk assessment, yet guidance on its measurement in clinical practice remains lacking. To identify functional capacity assessment tools studied before surgery and characterize the extent of evidence regarding performance, including in populations where assessment is confounded by noncardiopulmonary reasons. MEDLINE, EMBASE, and EBM Reviews (until July 2024). Studies evaluating performance of functional capacity assessment tools administered before elective noncardiac surgery to stratify risk for postoperative outcomes. Study details, measurement properties, pragmatic qualities, and/or clinical utility metrics. 6 categories of performance-based tests and 5 approaches using patient-reported exercise tolerance were identified. Cardiopulmonary exercise testing (CPET) was the most studied tool (132 studies, 32 662 patients) followed by field walking tests (58 studies, 9393 patients) among performance-based tests. Among patient-reported assessments, the Duke Activity Status Index (14 studies, 3303 patients) and unstructured assessments (19 studies, 28 520 patients) were most researched. Most evidence focused on predictive validity (92% of studies), specifically accuracy in predicting cardiorespiratory complications. Several tools lacked evidence on reliability (test consistency across similar measurements), pragmatic qualities (feasibility of implementation), or concurrent criterion validity (correlation to gold standard). Only CPET had evidence on clinical utility (whether administration improved postoperative outcomes). Older adults (≥65 years) were well represented across studies, whereas there were minimal data in patients with obesity, lower-limb arthritis, and disability. Synthesis focused on reported data without requesting missing information. Though several tools for preoperative functional capacity assessment have been studied, research has overwhelmingly focused on CPET and only 1 aspect of validity (predictive validity). Important evidence gaps remain among vulnerable populations with obesity, arthritis, and physical disability. None. (Open Science Framework: https://osf.io/ah7u5).

Adaptation of the ‘’Food Allergy Self-Efficacy Scale for Parents’’(FASE-P) to Turkish: a validity and reliability study

Background. Food allergy is a public health issue that has a significant impact on the lives of families. Parental self-efficacy/confidence is important in managing food allergies. The aim of this study is to validate the “Food Allergy Self-Efficacy Scale for Parents” (FASE-P) and assess parental self-efficacy in managing their child’s food allergy. Methods. Turkish version of the FASE-P (T-FASE-P) was administered to 347 parents of children aged 0-18 who had been followed for at least one month due to food allergy at the Pediatric Allergy Clinic of Prof. Dr. Cemil Taşcıoğlu City Hospital between September 1 and December 31, 2023, through face-to-face interviews and online surveys for parents of children with food allergies from the general population. Content validity, exploratory factor analysis (EFA), and confirmatory factor analysis (CFA) were conducted to evaluate the validity of the scale. General Self-Efficacy Scale (GSES) was used for concurrent criterion validity. Internal consistency analysis, test-retest application, and item analysis were conducted to assess its reliability. Results. T-FASE-P scale initially contained 21 items, and the Cronbach’s alpha coefficient (α) calculated in this form was found to be 0.89. Later, when 4 items were excluded, the 17-item version of the scale was calculated as α=0.90. The intra-class correlation coefficient between the test and re-test was found to be 0.972. The content validity index value of the scale was calculated as 0.99, indicating that the content validity was at a sufficient level. In the EFA, it was determined that the scale formed a three-factor structural model and that this model explained 60.82% of the total variance. As a result of the CFA, the fit indices were calculated as χ2/df=2.341, GFI=0.919, TLI=0.950, indicating a good level of fit. Based on the analysis results, T-FASE-P consists of 17 items and three subscales. Conclusion. T-FASE-P scale is a valid and reliable measurement tool that can be used to determine the food allergy self-efficacy of Turkish parents.

University Dropout: A Systematic Review of the Main Determinant Factors(2020-2024).

This research is a systematic review aimed at synthesizing scientific evidence on the causes of university dropout, focusing on the subcategories of vocational guidance, academic performance, socioeconomic status, and institutional aspects between 2020 and June 2024. Only articles addressing university dropout were considered, analyzing dimensions such as vocational guidance, academic performance, socioeconomic status, and institutional aspects. Articles published in indexed scientific journals with double-blind, double-blind peer, or open reviews between 2020 and June 2024 were included. The main databases used were Scopus, Web of Science, and Google Scholar. To assess the risk of bias in qualitative studies, the criteria from the article "Validity criteria for qualitative research: three epistemological strands for the same purpose" were used. For quantitative studies, the criteria from the article "Evaluating survey research in articles published in Library Science journals" were followed. For mixed-method studies, both sets of criteria were combined. A total of 23 studies were included: 15 quantitative (65.22%), 3 qualitative (13.04%), and 5 mixed-method (21.74%). All studies (100%) addressed the subcategories of socioeconomic status and institutional aspects. Regarding the academic performance subcategory, 86% of the studies addressed it, while the vocational guidance subcategory was covered by 73.91% of the studies. Vocational guidance, academic performance, socioeconomic status, and institutional aspects are crucial for reducing university dropout. Providing adequate professional guidance, academic support, financial assistance, and strong institutional support is fundamental to improving student retention and academic success.

ETWST: An Extension to the Timed Water Swallow Test for Increased Dysphagia Screening Accuracy.

We aimed to fine-tuning the Timed Water Swallow Test (TWST) screening procedure to provide the most reliable prediction of the Flexible Endoscopic Evaluation of Swallowing (FEES) assessment outcomes, with age, sex, and the presence of clinical signs of dysphagia being considered in the assessment. Participants were healthy people and patients with suspected dysphagia. TWST performance and participants' reported dysphagia symptoms were assessed in terms of their utility in predicting the outcome of a FEES assessment the same day. The FEES assessors were blinded to the nature of the TWST performance. The water swallowing capacity levels and clinical observations during a screening performance that were indicative of dysphagia/no symptoms in FEES were determined. Convergent validity was assessed as the agreement with the Functional Oral Intake Scale (FOIS) in the FEES assessment. TWST predicted FEES findings (aspiration and dysphagia) with a sensitivity of 72 and 45% and a specificity of 75% and 80%, respectively. Extended analysis of the TWST procedure (eTWST) identified aspiration (sensitivity = 92%, specificity = 62%) and dysphagia (sensitivity = 70%, and specificity = 72%) more accurately and showed a high correlation with FOIS (ɸ = 0.37). Excellent inter-rater reliability was further observed (Kw = 0.83). The extended evaluation of TWST performance has superior criterion validity to that of TWST. eTWST displayed high convergent validity and excellent interrater reliability. We therefore believe that eTWST can be highly relevant for clinical dysphagia screening.

Capturing the Mind: Non-Driving-Related Tasks as a Window into Cognitive Engagement in Automated Driving

Supervising automated driving requires visual, manual, and cognitive engagement from the driver. While visual and manual engagement measures are already developed and implemented, cognitive engagement is much more difficult to observe. Considering drivers’ self-regulatory behavior when involved in non-driving-related tasks (NDRTs) during partial automation, the demand and duration of these NDRTs may indicate a certain level of driver cognitive engagement. The study explores a rating measure to partially estimate driver cognitive engagement based on the demand and duration of NDRTs and evaluate the psychometric properties of the NDRT rating. We examined the internal consistency of the measure by computing split-half reliability, tested its sensitivity to factor manipulation, and assessed criterion validity. Our initial findings suggest that the method is reliable and valid, showing satisfactory internal consistency, sensitivity to experimental manipulation, and criterion validity in predicting the takeover performance of supervising vehicle automation.

Evaluating the Diagnosis of Malnutrition Based on Global Leadership Initiative on Malnutrition (GLIM) Criteria in Community-Dwelling Older Adults (Singapore Longitudinal Aging Study)

Background: A minority of studies using the GLIM criteria for malnutrition diagnosis have performed formal empirical validation. Objectives: To evaluate the concurrent and predictive validity of GLIM criteria with and without prior screening among community-dwelling older adults in Singapore. Method: In the Singapore Longitudinal Aging Study (SLAS-2, n = 2477), malnutrition was diagnosed using single-step and two-step GLIM procedures using the Mini Nutritional Assessment Short Form (MNA-SF) and Elderly Nutritional Index for Geriatric Malnutrition Assessment (ENIGMA) for initial screening. Criterion validity was evaluated using MNA-Full Form (MNA-FF) as reference malnutrition diagnosis. Prognostic validity was evaluated using logistic and Cox regression analyses with respect to impaired quality of life (QoL) and 10-year mortality. Results: GLIM malnutrition with and without MNA-SF or ENIGMA screening showed significant associations with known clinical correlates; single-step GLIM malnutrition: sensitivity = 80%, specificity = 83%; two-step MNA-SF-GLIM malnutrition: sensitivity = 80%, specificity = 85%; two-step ENIGMA-GLIM malnutrition: sensitivity = 74%, specificity = 88%; positive predictive values of around 20% and negative predictive values above 98%. Cohen’s kappa values of agreement were uniformly low (0.26 to 0.32). All showed significant associations with about 50% increased odds of impaired QoL and 10-year mortality, adjusted for age, sex, ethnicity, education levels, and housing type, with the ENIGMA-GLIM malnutrition showing the highest risk estimates. Compared to MNA-FF malnutrition prevalence of 4.1%, GLIM-based malnutrition increased prevalence (14.6% to 19.7%) estimates. Conclusions: The GLIM criteria showed good construct and criterion validity. It increased the number of individuals diagnosed with malnutrition. The agreement between diagnoses of malnutrition was low. Diagnostic and prognostic accuracy vary with the screening instrument used. Early identification of malnutrition using appropriate tools can provide opportunities to delay or prevent the risk of important adverse outcomes such as impaired QoL and mortality.

Development and Validation of Objective and Subjective Osteoporosis Knowledge Instruments Among Chinese Orthopaedic Surgeons.

Clinicians must be knowledgeable about osteoporosis so that they can convey information regarding the prevention of fragility fractures to their patients. The purposes of this study were to develop objective and subjective knowledge instruments for osteoporosis and fragility fractures and then test their reliability and validity among Chinese orthopaedic surgeons. A 2-round procedure was used to develop the objective and subjective knowledge instruments. A cross-sectional online survey was distributed to 293 orthopaedic surgeons; 189 surgeons returned the questionnaires. We examined internal consistency, test-retest reliability, criterion validity, and discriminant validity; we also compared the subjective knowledge level with the objective knowledge level among surgeons. Our results showed that the Subjective Knowledge Scale (SKS) regarding Osteoporosis and Fragility Fractures had a high Cronbach alpha coefficient (0.915), and the objective Osteoporosis Knowledge Test for Clinicians (OKTC) had an adequate Kuder-Richardson 20 coefficient (0.64). Item analyses were conducted, and a short version of the OKTC (the OKTC-SF) was developed. The SKS, the OKTC, and the OKTC-SF all showed good test-retest reliability, criterion validity, and discriminant validity. The percentage of surgeons with a high subjective knowledge level was higher than the percentage of surgeons who selected the correct answer for several corresponding questions related to objective knowledge. The SKS, the OKTC, and the OKTC-SF all demonstrated good reliability and validity. However, the orthopaedic surgeons may have overestimated their knowledge level regarding osteoporosis. Targeted continuing medical education that is based on individual knowledge level is needed to improve the undertreatment of osteoporosis among patients with fragility fractures.

Reliability and Validity of the Turkish Version of the Deglutition Handicap Index.

The Deglutition Handicap Index (DHI) is a self-reported questionnaire focus on dysphagia related quality of life of patients. The present study was aimed to translate the DHI into Turkish, and investigate the reliability and validity of the Turkish version of the DHI (T-DHI). A total of 100 patients with different diagnoses participated. The study was carried out in 3 phases including translation, reliability and validation phases. The translation phase was performed by the forward-backward-forward translation methodology. The internal consistency and test-retest reliability were used for reliability phase. The criterion validity of the T-DHI was investigated for validation phase. The Cronbach's alpha value of the T-DHI was 0.93 of which indicates excellent internal consistency. The Intraclass Correlation Coefficient ranged from 0.96 to 0.99 for test-retest reliability. There was negative and weak correlation between functional subscale score from the T-DHI and the Functional Oral Intake Scale (r=-0.29, p = 0.004), and positive and moderate to strong correlations between total and subscale scores from the T-DHI and the Turkish version of the Eating Assessment Tool (r = 0.67-0.78, p < 0.001) indicating sufficient criterion validity. The T-DHI is a reliable and valid questionnaire to define dysphagia related quality of life of patients. Clinicians could be used the T-DHI during swallowing evaluation part during the management process of deglutition disorders to plan patient centered rehabilitation, improve care and follow up.

Validity of the Chronic Pain Grade Scale in nonspecific chronic low back pain

Higher pain grades are associated with high psychological burden and increase the risk for the persistence of chronic low back pain (CLBP). Previous results on the criterion validity of the Chronic Pain Grade Scale (CPGS) have been extended to the context of inpatient multidisciplinary orthopedic rehabilitation (MOR) and have been supplemented with additional psychosocial and work-related measures. In this multicenter study, psychological, work- and pain-related outcomes were examined among 1010 individuals with nonspecific CLBP (ICD-10: M51/53/54) prior to the beginning of an inpatient MOR stratified by pain grade (I-IV). Additionally, frequency distributions of scores regarding pain-specific self-efficacy, depression, and subjective prognosis of gainful employment by pain grade in patients were investigated. The CPGS differed between all pain grades in the psychological, work- and pain-related outcomes in the expected direction. In post hoc pairwise comparisons, gradeIV was significantly different from the lower grades. Patients with higher pain grades showed unfavorable levels in psychosocial parameters and more frequently scores in the clinical range than expected. These results confirm the criterion validity of the CPGS. The psychosocial risk pattern observed in higher pain grades supports the importance of conducting early pain-related and psychological diagnostic assessments and implementing systematic allocation to needs-based interdisciplinary multimodal treatments.

Validity of a Consumer-Based Wearable to Measure Clinical Parameters in Patients With Chronic Obstructive Pulmonary Disease and Healthy Controls: Observational Study.

Consumer-based wearables are becoming more popular and provide opportunities to track individual's clinical parameters remotely. However, literature about their criterion and known-groups validity is scarce. This study aimed to assess the validity of the Fitbit Charge 4, a wrist-worn consumer-based wearable, to measure clinical parameters (ie, daily step count, resting heart rate [RHR], heart rate variability [HRV], respiratory rate [RR], and oxygen saturation) in patients with chronic obstructive pulmonary disease (COPD) and healthy controls in free-living conditions in Belgium by comparing it with medical-grade devices. Participants wore the Fitbit Charge 4 along with three medical-grade devices: (1) Dynaport MoveMonitor for 7 days, retrieving daily step count; (2) Polar H10 for 5 days, retrieving RHR, HRV, and RR; and (3) Nonin WristOX2 3150 for 4 nights, retrieving oxygen saturation. Criterion validity was assessed by investigating the agreement between day-by-day measures of the Fitbit Charge 4 and the corresponding reference devices. Known-groups validity was assessed by comparing patients with COPD and healthy controls. Data of 30 patients with COPD and 25 age- and gender-matched healthy controls resulted in good agreement between the Fitbit Charge 4 and the corresponding reference device for measuring daily step count (intraclass correlation coefficient [ICC2,1]=0.79 and ICC2,1=0.85, respectively), RHR (ICC2,1=0.80 and ICC2,1=0.79, respectively), and RR (ICC2,1=0.84 and ICC2,1=0.77, respectively). The agreement for HRV was moderate (healthy controls: ICC2,1=0.69) to strong (COPD: ICC2,1=0.87). The agreement in measuring oxygen saturation in patients with COPD was poor (ICC2,1=0.32). The Fitbit device overestimated the daily step count and underestimated HRV in both groups. While RHR and RR were overestimated in healthy controls, no difference was observed in patients with COPD. Oxygen saturation was overestimated in patients with COPD. The Fitbit Charge 4 detected significant differences in daily step count, RHR, and RR between patients with COPD and healthy controls, similar to those identified by the reference devices, supporting known-groups validity. Although the Fitbit Charge 4 shows mainly moderate to good agreement, measures of clinical parameters deviated from the reference devices, indicating that monitoring patients remotely and interpreting parameters requires caution. Differences in clinical parameters between patients with COPD and healthy controls that were measured by the reference devices were all detected by the Fitbit Charge 4.

Psychometric evaluation and measurement invariance of the problematic smartphone use scale among college students: A national survey of 130 145 participants.

Given the insufficient validation of previously imported smartphone addiction scales in China, this study revised and evaluated the Problematic Smartphone Use Scale among Chinese college students (PSUS-C). We based our research on a national sample comprising 1324 higher education institutions and 130 145 participants. Using cross-sectional data, comprehensive methods were employed to examine validity, reliability and measurement invariance. The final scale consists of 20 items across four dimensions: withdrawal and loss of control, negative impact, salience behaviors and excessive use. All Heterotrait-Monotrait (HTMT) values were below 0.85, and the lower 90% and upper 95% confidence intervals were also below 0.85, except for factors 1 and 3. The amount of variance (AVE) values were greater than 0.5, composite reliability (ω) values exceeded 0.89 and all factor loadings were above 0.5. The criterion validity was supported as expected: problematic smartphone usage positively correlated with depression (r = 0.451), loneliness (8 items, r = 0.455), loneliness (6 items, r = 0.504), social media use (r = 0.614) and phone usage duration (r = 0.148); and negatively correlated with life satisfaction (r = -0.218) and self-esteem (r = -0.416). Across sex, type of university and place of residence, the measurement invariance performed well, with most changes in root mean square error of approximation (ΔRMSEA), comparative fit index (ΔCFI) and Tucker-Lewis index (ΔTLI) values being less than 0.005, and no indicator showing a difference greater than 0.010. The Problematic Smartphone Use Scale for College Students (PSUS-C) demonstrated good factor structure, internal consistency, construct validity, discriminant validity and criterion validity. Strict and structural invariance were demonstrated across sex, type of university and place of residence. The PSUS-C has the potential to assess smartphone addiction among Chinese university students.