Tag: statistics

Acta Orthop. 2025 Sep 17;96:684-691. doi: 10.2340/17453674.2025.44595.

ABSTRACT

BACKGROUND AND PURPOSE: Traditional surgery for arthritis of the distal radioulnar joint (DRUJ), which typically involves resecting the ulnar head, is being increasingly challenged by newer techniques, such as prosthetic ulnar head replacement. The aim of our prospective cohort study was to investigate the clinical and patient-reported functional results, up to 2 years postoperatively, among patients with DRUJ arthritis treated with ulnar head replacement or resection.

METHODS: 40 patients were included and underwent either ulnar head replacement (n = 22) or ulnar head resections (n = 18), due to DRUJ pathology between 2015 and 2020. Patients were followed up at 3, 6, 12, and 24 months postoperatively by the means of Patient-Rated Wrist Evaluation (PRWE) (primary outcome), and Disability of the Arm, Shoulder and Hand (DASH) questionnaires, pain, range of forearm rotation, and grip strength (secondary outcomes). Postoperative complications were recorded. 19 and 16 patients, respectively, responded at the 24-months follow-up. Female sex and inflammatory arthritis were more common in the resection group. General linear regression analyses adjusting for diagnosis and baseline PRWE score were performed for our primary outcome.

RESULTS: The median and interquartile range (IQR) improvement in PRWE from baseline to 24 months was 69 (IQR 49-87) to 27 (IQR 6-48) in the replacement group and 60 (IQR 50-86) to 23 (IQR 5-44) in the resection group, indicating that both groups improved from baseline. There were no differences in unadjusted estimates at any time point. The adjusted means in PRWE at 24 months were 35 and 26 points in the replacement and resection groups, respectively, corresponding to a statistically insignificant mean difference of 8.6 (95% confidence interval -11.7 to 28.2). We found no statistically significant group differences in any of the secondary outcomes at any time point. Postoperative complications affected 6 patients with ulnar head replacement, whereas none were reported for patients with ulnar head resection.

CONCLUSION: We found that the outcome after ulnar head replacement is not superior to ulnar head resection in the short term.

PMID:40961374 | DOI:10.2340/17453674.2025.44595

JMIR Med Educ. 2025 Sep 17;11:e62666. doi: 10.2196/62666.

ABSTRACT

BACKGROUND: Applying functional anatomy to clinical examination techniques in shoulder examination is challenging for physicians at all learning stages. Anatomy teaching has shifted toward a more function-oriented approach and has increasingly incorporated e-learning. There is limited evidence on whether the integrated teaching of professionalism, clinical examination technique, and functional anatomy via e-learning is effective.

OBJECTIVE: This study aimed to investigate the impact of an integrated blended learning course on the ability of first-year medical students to perform a shoulder examination on healthy volunteers.

METHODS: Based on Kolb’s experiential learning theory, we designed a course on shoulder anatomy and clinical examination techniques that integrates preclinical and clinical content across all 4 stages of Kolb’s learning cycle. The study is a randomized, observer-blinded controlled trial involving first-year medical students who are assigned to one of two groups. Both groups participated in blended learning courses; however, the intervention group’s course combined clinical examination, anatomy, and professional behavior and included a peer-assisted practice session as well as a flipped classroom seminar. The control group’s course combined an online lecture with self-study and self-examination. After completing the course, participants uploaded a video of their shoulder examination. The videos were scored by 2 blinded raters using a standardized examination checklist with a total score of 40.

RESULTS: Thirty-eight medical students were included from the 80 participants needed based on the power calculation. Seventeen intervention and 14 control students completed the 3-week study. The intervention group students scored a mean of 34.71 (SD 1.99). The control students scored a mean of 29.43 (SD 5.13). The difference of means was 5.3 points and proved to be statistically significant (P<.001; 2-sided Mann-Whitney U test).

CONCLUSIONS: The study shows that anatomy, professional behavior, and clinical examination skills can also be taught in an integrated blended learning approach. For first-year medical students, this approach proved more effective than online lectures and self-study.

PMID:40961369 | DOI:10.2196/62666

JMIR Public Health Surveill. 2025 Sep 17;11:e71677. doi: 10.2196/71677.

ABSTRACT

BACKGROUND: Cervical cancer has been ranked as the fourth most common cancer affecting women, contributing to approximately 660,000 new diagnoses and 350,000 fatalities worldwide. Effective early screening has been shown to reduce cervical cancer incidence by up to 80% and prevent more than 40% of new cases.

OBJECTIVE: This study aims to assess a machine learning-based prediction model and identify the key predictors influencing cervical cancer screening uptake among women aged 30-49 years in sub-Saharan Africa.

METHODS: For this study, a weighted dataset of 33,952 individuals from the 2022 Demographic and Health Survey in Ghana, Kenya, Mozambique, and Tanzania was used. STATA version 17 (StataCorp) and Python 3.10 (Python Software Foundation) were used for data preprocessing and analysis. MinMax and standard scaler were applied for feature scaling, and recursive feature elimination was used for feature selection. An 80:20 ratio was applied for data splitting. Tomek links with random oversampling were used for handling class imbalance. A total of 7 models were selected and trained using both balanced and unbalanced datasets. Model evaluation was performed using area under the receiver operating characteristic curve, accuracy, and a confusion matrix.

RESULTS: The proportion of cervical cancer screening in sub-Saharan Africa was 13%, which is lower than reported in previous studies. Random forest was the best-performing model, achieving an accuracy of 78%, an area under the curve of 86%, an F1-score of 79%, a recall of 81%, and a precision of 77%. The waterfall plot’s Shapley Additive Explanations analysis showed that wealth status, awareness of sexually transmitted infections, HIV testing exposure, age at first sexual intercourse, educational level, residency, smartphone ownership, having a single sexual partner, and previous health status were predictors of cervical cancer screening.

CONCLUSIONS: Improving education and awareness, expanding access to screening (especially in rural areas), leveraging both digital health and community-based outreach, integrating screening with other health services, and addressing socioeconomic barriers are recommended strategies to increase cervical cancer screening rates in sub-Saharan Africa.

PMID:40961361 | DOI:10.2196/71677

Microb Genom. 2025 Sep;11(9). doi: 10.1099/mgen.0.001496.

ABSTRACT

Riboswitches are widely distributed RNA regulatory elements primarily found in prokaryotes. Over a decade ago, it was discovered that certain genes are regulated either by multiple tandemly arranged riboswitches or by riboswitches with tandem sensor domains.Riboswitches consist of a sensor domain, also known as an aptamer, and an expression platform, primarily regulating gene expression through transcription or translation attenuation, although other mechanisms such as RNA splicing or stability modulation are also possible. In tandemly arranged riboswitches, the first riboswitch is often positioned far from the ribosome binding site of the target gene, making transcriptional regulation a likely primary mechanism. In contrast, riboswitches with adjacent aptamers have a single expression platform, which may be located at varying distances from the regulated gene. Consequently, no inherent bias towards either transcriptional or translational regulation is expected in this case.Considering the reported enrichment of transcriptional riboswitches in certain phylogenetic clades, the present study analyses the distribution of tandemly arranged riboswitches and riboswitches with adjacent aptamers across various phylogenetic groups, as well as the tendencies of different riboswitch families to regulate genes in a contiguous fashion. Our results indicate that Bacillota is the phylum with the most notable families of tandemly arranged riboswitches. In contrast, regulation of gene expression via tandem sensor domains was predominantly associated with the Pseudomonadota phylum. On the other hand, our statistical analysis identified the T-box and cyclic dimeric guanosine monophosphate as the most prominent members of tandemly arranged riboswitches, while the glycine riboswitch is the most relevant family to be composed of adjacent aptamers.In addition, this article presents a comprehensive analysis of all relevant orthologous gene groups regulated by contiguous riboswitches, highlighting trends in cases where strict regulation is necessary due to the high metabolic cost of a pathway. Finally, we provide an in-depth discussion of the observed regulatory tendencies.

PMID:40961346 | DOI:10.1099/mgen.0.001496

Am Fam Physician. 2025 Sep;112(3):301-312.

ABSTRACT

Autism is a lifelong neurodevelopmental condition that affects approximately 1 in 31 US children and 1 in 45 US adults; autism spectrum disorder includes a wide range of neurologic diversity, symptoms, challenges, strengths, and abilities. The Diagnostic and Statistical Manual of Mental Disorders, 5th ed., text revision criteria for autism spectrum disorder require deficits in three areas of communication and social interaction across multiple settings, with at least two restricted or repetitive behaviors, not explained by another condition, and causing functional impairment. The American Academy of Pediatrics recommends screening for autism at ages 18 and 24 months in addition to routine developmental surveillance, whereas screening in adults is not recommended. Diagnosis should include a multidisciplinary team and a multidimensional assessment. Autistic individuals have a 20- to 30-year lower life expectancy than nonautistic people and experience higher rates of many chronic conditions, such as diabetes, epilepsy, gastrointestinal concerns, feeding disorders, and mental health disorders (eg, attention-deficit/hyperactivity disorder, depression, anxiety, schizophrenia). Treatment of children with autism spectrum disorder focuses on minimizing core deficits, maximizing functional independence, and preventing problem behaviors. Pharmacologic therapy may be indicated for related conditions or symptoms, such as sleep disorders, seizures, mental health conditions, behavior problems, and gastrointestinal issues. Melatonin effectively reduces sleep symptoms and improves daytime behaviors with minimal adverse effects. The SPACE (sensory, predictability, acceptance, communication, empathy) framework provides specific interventions that make health care more accessible and affirming to autistic patients.

PMID:40961308

Nutr Health. 2025 Sep 17:2601060251378785. doi: 10.1177/02601060251378785. Online ahead of print.

ABSTRACT

BackgroundLifestyle factors, including dietary fasting and structured eating habits, may influence neurodegenerative processes in Huntington’s disease (HD), yet little is known about dietary behaviors in this population.AimEvaluate the frequency of fasting habits, identify meal timing characteristics, and explore dietary composition choices in individuals with or at-risk for HD.MethodsAn electronic survey was distributed within the HD community. Responses were collected for one year and statistically analyzed.ResultsAmong 116 respondents, 42% reported practicing a fasting protocol, with 36% sustaining it for over a year and 40% applying it as a weight loss strategy. The most common type was daily 16:8 fasting. Mediterranean, low-carbohydrate, and vegetarian diets were the most frequently adopted structured dietary patterns.ConclusionsFasting and structured eating habits are common in the HD community, suggesting dietary interventions may be feasible and relevant. Future studies are needed to evaluate their safety and effects in HD.

PMID:40961265 | DOI:10.1177/02601060251378785

J Biomech Eng. 2025 Sep 17:1-21. doi: 10.1115/1.4069774. Online ahead of print.

ABSTRACT

This study introduces a novel framework for generating personalized musculoskeletal models to predict tibial strains from video data. By integrating a statistical shape model (SSM) with markerless motion capture, this approach enables strain prediction without requiring medical scans or marker-based data collection, making it particularly useful in settings like Basic Combat Training. Additionally, we evaluate the impact of using single versus multiple principal components in estimating musculoskeletal injury risk indicators, such as tibial strains. Data from seven participants performing a one-legged hop were used to evaluate this framework. To determine the impact of using single versus multiple PCs on tibial strain predictions, the same loading profile was applied to the personalized models. Based on the observed effects, we selected the appropriate number of PCs and applied personalized loading profiles to the corresponding finite element (FE) models to predict tibial strains. Our findings indicate that using only the first PC to develop FE musculoskeletal models leads to differences in strain predictions compared to models incorporating multiple PCs, as the latter capture subtle morphological variations. The first PC primarily accounts for variability in overall size and relying solely on it may result in similar strain predictions for subjects of comparable stature. This study highlights the importance of incorporating higher-order PCs to better capture morphological differences, ultimately influencing strain distribution and injury risk assessment. The approach presented in this study offers a scalable, efficient solution for personalized biomechanical modeling, with applications in both individual and population-level injury risk analysis.

PMID:40960884 | DOI:10.1115/1.4069774

Clin Chem Lab Med. 2025 Sep 10. doi: 10.1515/cclm-2025-0949. Online ahead of print.

ABSTRACT

OBJECTIVES: To investigate the relationship between uracilemia (U) and dihydropyrimidine dehydrogenase (DPD) activity in peripheral blood mononuclear cells (PBMC) and whether they are influenced by renal or hepatic impairment.

METHODS: This retrospective study included 176 cancer patients with pre-treatment U (UPLC-MSMS assay) and PBMC-DPD (radioenzymatic assay) analyzed the same day (routine phenotyping). Blood renal (creatinine, BUN) and hepatic (ALT, AST, GGT, ALP, albumin, bilirubin) work-up was performed within 15 days before or up to 4 days after DPD phenotyping. Biochemical markers were categorized according to CTCAEv5.0 grade (G). Glomerular filtration rate (eGFR) was estimated (CKD-EPI and EKFC). Non-parametric statistical tests were used.

RESULTS: Prevalence of partial deficiency was 3.4 % based on PBMC-DPD (i.e. ≤100 pmol/min/mg) and 6.3 % based on U (i.e. ≥16 μg/L). No complete deficiency was observed. Fifteen patients out of 176 (8.5 %) exhibited discordant DPD status between PBMC activity and U. The correlation between PBMC-DPD and U was significant but weak (r= -0.309, p<0.001). PBMC-DPD (mean 246, median 235, range 62-926 pmol/min/mg prot) was not influenced by renal or hepatic impairment. U (mean 9.6, median 8.5, range 1.7-57.8 μg/L) was significantly higher in patients with elevated BUN (normal vs. >1-UNL, p=0.009), GGT (G0 vs. G1 vs. G2 vs. G3, p<0.001), AST (G0 vs. G≥1, p=0.015), or with hypoalbuminemia (G0 vs. G ≥ 1, p=0.045). Categorized creatinine or eGFR did not influence U.

CONCLUSIONS: It remains unclear whether renal and/or hepatic impairment acts as a confounding factor affecting the accuracy of uracilemia testing, or whether truly impacts DPD activity, suggesting caution in U interpretation.

PMID:40960875 | DOI:10.1515/cclm-2025-0949

J Med Internet Res. 2025 Sep 17;27:e65939. doi: 10.2196/65939.

ABSTRACT

BACKGROUND: Individual-level dietary intake data are fundamental for developing nutrition policy and programs. In low- and lower-middle-income countries, proxy measures of individual intake (household consumption and expenditure surveys and food balance sheets) are often used, with limited implementation of new technology-assisted applications.

OBJECTIVE: We aimed to determine the relative validity, test-retest reliability, and acceptability of the Voice-Image Solution for Individual Dietary Assessment (VISIDA) system in a sample of Cambodian women and their children aged ≤5 years.

METHODS: Mothers and one of their children were recruited from 3 locations (rural, semirural, and urban) in Siem Reap province, Cambodia. Dietary intake data were collected for each participant using 2 methods across 3 recording periods over approximately 4 weeks. In week 1, intake was recorded using VISIDA for 3 nonconsecutive days, followed by 3 interviewer-administered, multiple-pass 24-hour recalls collected in weeks 2 to 3. In week 4, VISIDA was used again to collect a 3-day food record. After the third intake recording period, the mothers completed a feedback survey. Differences in estimated nutrient intakes for the 3 recording periods for mothers and children were examined using a linear mixed model approach.

RESULTS: The analysis included 210 participants (n=119, 56.7% mothers and n=91, 43.3% children). Estimated mean nutrient intakes reported in both VISIDA recording periods were mostly lower compared to intakes reported using the 24-hour recalls. Compared to the 24-hour recalls, statistically significant differences were found for the VISIDA recording periods for 80% (16/20) of nutrients for mothers and 32% (6/19) of nutrients for children. Nutrient intakes estimated from both VISIDA recording periods showed no statistically significant differences for mothers and children. For mothers, the differences of model weighted marginal means in energy intakes (kcal) were -296 (95% CI -410 to -181; VISIDA period 1 minus 24-h recall), -274 (95% CI -390 to -158; VISIDA period 2 minus 24-h recall), and -22 (95% CI -131 to 87; VISIDA period 1 minus VISIDA period 2). For children, the differences in model weighted marginal means in energy intakes (kcal) were -158 (95% CI -227 to -89; VISIDA period 1 minus 24-h recall), -127 (95% CI -198 to -57; VISIDA period 2 minus 24-h recall), and -31 (95% CI -98 to 37; VISIDA period 1 minus VISIDA period 2). Most mothers reported that the VISIDA smartphone app was “easy to use” (68/108, 63%) or “very easy to use” (23/108, 21.3%) for collecting dietary intake data.

CONCLUSIONS: The VISIDA system produced lower estimates of nutrient intakes when compared to the 24-hour recalls in a sample of mothers and children in Siem Reap province, Cambodia. However, the estimated nutrient intakes for the 2 VISIDA recording periods were similar. The participating mothers reported high acceptability for using the VISIDA smartphone app to collect intake data.

PMID:40960862 | DOI:10.2196/65939

JAMA Netw Open. 2025 Sep 2;8(9):e2532319. doi: 10.1001/jamanetworkopen.2025.32319.

ABSTRACT

IMPORTANCE: Implicit bias recognition and management (IBRM) training is a promising strategy for improving clinician communication but is underevaluated.

OBJECTIVE: To describe the development and psychometric properties of the Respect, Empathize, Listen, Ask, Talk, and Engage (RELATE) rating scale, based on a theoretical framework of communication skills, to mitigate negative influences of implicit bias by using strategies for interrupting unconscious decision-making in patient-centered communication.

DESIGN, SETTING, AND PARTICIPANTS: In this cross-sectional study, between September 2019 and April 2022, standardized patients used the RELATE rating scale to evaluate communication skills of participating clinical trainees at an academic medical center who completed an IBRM training and engaged in simulated clinical encounters with standardized patients representing those with low socioeconomic status and African American, Latino or Hispanic, and African immigrant patients. Statistical analyses were ongoing from June 2021 to January 2024.

MAIN OUTCOME AND MEASURES: Gwet agreement coefficient (AC) was calculated using data from the 2019 to 2020 cohort year to assess standardized patient interrater reliability (IRR). To assess construct validity and internal consistency reliability, factor analysis techniques were used, and Cronbach α was calculated using data from 3 cohorts (2019-2020, 2020-2021, and 2021-2022).

RESULTS: Twenty-seven standardized patients generated 226 independent RELATE ratings for 123 consenting clinical trainees (14 family medicine residents [11.4%], 48 internal medicine residents [39.0%], and 61 doctor of nursing practice students [49.6%]; mean [SD] age, 30.4 [4.1] years; 82 [66.7%] female), who each had 2 RELATE scores. Of the 3-level item responses of whether a behavior was observed (“present,” “partial,” or “absent”), for all 19 items, at least 1 trainee (0.4%) was noted who did not complete the evaluated behavior, and all items had some responses of “partial” (range, 13 [5.8%] to 70 [31.0%]). Twelve of the 19 RELATE items (63.2%) showed either substantial or almost perfect IRR (Gwet AC, >0.60), and 6 items (31.6%) had moderate IRR (Gwet AC, 0.41-0.60). Factor analyses resulted in a final 4-factor solution with excellent model fit indices and strong factor loadings: respect (4 items), empathy (5 items), listening and talking (6 items), and engaging in partnership with patients (4 items). Each factor showed sound internal consistency (Cronbach α range, 0.64-0.77).

CONCLUSIONS AND RELEVANCE: This cross-sectional study of the RELATE rating scale demonstrated high construct validity and good internal consistency in simulated clinician-patient encounters. The findings suggest that the RELATE rating scale is an efficient, theoretically consistent tool to evaluate implicit bias-management communication behavior among clinicians.

PMID:40960826 | DOI:10.1001/jamanetworkopen.2025.32319