Category: Statistics

J Korean Biol Nurs Sci. 2026 May;28(2):330-340. doi: 10.7586/jkbns.26.002. Epub 2026 May 27.

ABSTRACT

PURPOSE: This study examined the effects of emotional experiences and interactions with healthcare providers on self-management behaviors and glycemic control, as measured by hemoglobin A1c (HbA1c), in patients with type 2 diabetes mellitus.

METHODS: This cross-sectional study included 120 patients recruited from six local clinics between April 12 and July 15, 2021. Data were collected using the Scale of Positive and Negative Experience, the Client Satisfaction Tool, the Summary of Diabetes Self-Care Activities Questionnaire, and HbA1c measurements. Descriptive statistics, t-tests, analysis of variance, Pearson correlation coefficients, and hierarchical regression analyses were performed using SPSS version 31.0.

RESULTS: The mean age of the participants was 60.06 years, and the mean duration of diabetes was 7.79 years. Hierarchical regression analysis showed that interactions with healthcare providers and smoking status explained 11.0% of the variance in self-management behaviors. Negative emotion, sex, presence of diabetic complications, and smoking status explained 27.0% of the variance in HbA1c levels.

CONCLUSION: Negative emotions and the quality of interactions with healthcare providers were significant factors associated with self-management behaviors and glycemic control in patients with type 2 diabetes mellitus. These findings highlight the need for early identification of high-risk patients and for comprehensive management strategies that incorporate psychological support and smoking cessation interventions. In addition, regular, individualized education and feedback, together with empathetic communication that acknowledges patients’ emotional experiences, may be important components of effective diabetes care.

PMID:42581730 | DOI:10.7586/jkbns.26.002

J Korean Biol Nurs Sci. 2026 May;28(2):300-316. doi: 10.7586/jkbns.26.016. Epub 2026 May 26.

ABSTRACT

PURPOSE: This descriptive correlational study aimed to identify personal, organizational, and environmental factors influencing the performance of standard precautions (SPs) among intensive care unit (ICU) nurses.

METHODS: A structured questionnaire survey was conducted among 166 ICU nurses at two tertiary hospitals in South Korea. Data were analyzed using IBM SPSS Statistics version 25.0, including independent t-tests, analysis of variance, Pearson correlation analysis, and hierarchical regression analysis.

RESULTS: Hierarchical regression analysis identified organizational culture for infection control (β = .41, p < .001), awareness of SPs (β = .37, p < .001), and clinical experience (β = .18, p = .007) as significant predictors of SP performance. In contrast, the infection prevention environment was not a statistically significant predictor. The final model explained 54.0% of the variance in SP performance (F = 23.39, p < .001), with an adjusted R2 of 52.0%.

CONCLUSION: To enhance SP performance among ICU nurses, multidimensional, career-tailored interventions are needed to move beyond traditional knowledge-based education and facilitate the transition from awareness to practice. In addition, establishing supportive and constructive communication systems within a nonpunitive environment for reporting infection control errors or noncompliance, together with supportive leadership, may help create a sustainable organizational foundation for infection prevention. Ultimately, shifting the focus from physical facilities to organizational culture is essential for preventing pathogen transmission and ensuring physiological safety.

PMID:42581728 | DOI:10.7586/jkbns.26.016

J Korean Biol Nurs Sci. 2026 May;28(2):217-230. doi: 10.7586/jkbns.26.013. Epub 2026 May 27.

ABSTRACT

PURPOSE: This study provides an updated analysis of research trends in the Journal of Korean Biological Nursing Science (JKBNS) by examining changes in publication volume, methodological approaches, and thematic evolution among articles published between 2011 and 2025.

METHODS: Retrospective descriptive and bibliometric analyses were conducted on 537 articles published in JKBNS. Publication characteristics and statistical methods were summarized, and annual trends were examined. Keyword co-occurrence networks were generated using VOSviewer, and changes in research topics over time were explored using burst keyword analysis based on abstract-derived keywords.

RESULTS: Annual publication volume fluctuated but increased markedly in recent years, rising from 35 articles in 2024 to 58 articles in 2025. A language crossover occurred in 2024, when English-language articles (n = 19, 54.3%) exceeded Korean-language articles (n = 16, 45.7%); this predominance of English-language articles became more evident in 2025 (n = 36, 62.1%). Adult patients were the most common study population (n = 127, 23.7%). Analysis of variance was the most frequently used statistical method (n = 236, 43.9%), followed by linear regression (n = 84, 15.6%) and logistic regression (n = 59, 11.0%). Burst keyword analysis highlighted recent increases in aging- and health behavior-related terms. Co-occurrence mapping identified interconnected thematic areas spanning health behavior and risk, nursing knowledge and practice, and biologically oriented research.

CONCLUSION: Between 2011 and 2025, JKBNS demonstrated growth in publication volume, a shift toward English-language articles, and evolving research topics, while maintaining thematic continuity with its biological orientation.

PMID:42581722 | DOI:10.7586/jkbns.26.013

Ann Occup Environ Med. 2026 Aug;38:e23. doi: 10.35371/aoem.2026.38.e23. Epub 2026 Jul 1.

ABSTRACT

BACKGROUND: Occupational and environmental medicine (OEM) specialists are key personnel within the occupational health system. Recent developments, such as the introduction of the Serious Accidents Punishment Act and the expansion of occupational health policies targeting vulnerable workers, have highlighted the need to broaden the role of OEM specialists. This study analyzed the current workload of OEM specialists and projected their medium- to long-term demand.

METHODS: The demand for OEM specialists was defined as the actual observed service utilization volume under the current legal, institutional, and policy environment. Key work areas were categorized as special health examinations and outsourced occupational health management services. Data sources included administrative records from the Korea Occupational Safety and Health Agency (KOSHA) and the Ministry of Employment and Labor (MoEL), statistics on worker health examination results, and evaluation data from specialized agencies for occupational health management. Demand through 2035 was projected by applying the observed historical growth trend in service utilization. The required number of specialists was calculated by applying the average workload per specialist in the base year.

RESULTS: As of 2025, 577 OEM specialists were working at 255 special health examination institutions. Among the 153 occupational health management agencies, 265 physicians were employed, including 133 OEM specialists. The number of workers requiring services from OEM specialists is predicted to continue growing. Applying the current average workload per physician, an additional 132 special health examination physicians and 92 occupational health management agency physicians will be needed by 2035.

CONCLUSIONS: Actual workforce demand may differ from the projections presented in this study depending on changes in policies, industrial structure, service delivery models, and work efficiency. Future studies should incorporate need-based estimates that reflect the diverse roles of OEM specialists and use integrated workforce data to provide more refined projections.

PMID:42581702 | DOI:10.35371/aoem.2026.38.e23

Brain Behav. 2026 Aug;16(8):e71665. doi: 10.1002/brb3.71665.

ABSTRACT

INTRODUCTION: The medial olivocochlear reflex (MOCR), an efferent feedback pathway, modulates cochlear gain to enhance signal detection in noise. It is commonly assessed non-invasively via contralateral suppression of transient-evoked otoacoustic emissions (TEOAEs). While unmodulated noise is a standard elicitor, ecologically relevant amplitude-modulated (AM) noises may be more effective activators, though literature findings are conflicting regarding the optimal modulation rate. This study aimed to compare the efficacy of unmodulated white noise (WN) and WN modulated at 10, 50, and 100 Hz (AM-BBN) in eliciting the MOCR, as measured by TEOAE suppression. A secondary objective was to investigate the frequency specificity and laterality of the suppression effect.

METHODS: Forty-six normal-hearing adults participated. TEOAEs were recorded ipsilaterally while presenting contralateral noise stimuli (WN, M10, M50, and M100 Hz) at 60 dB SPL. Suppression was measured across frequency bands (1, 1.5, 2, 3, and 4 kHz) and ears. Non-parametric statistical analyses were employed due to non-normal data distribution.

RESULTS: A significant main effect was found for stimulus type (χ²(3) = 28.45, p < 0.001). Post-hoc analyses revealed that M50 and M100 Hz elicited significantly greater suppression than WN (p = 0.003 and p = 0.007, respectively) and M10 Hz. Suppression was strongest at lower frequencies (1-2 kHz) and weakest at 4 kHz (p < 0.001). The right ear showed significantly greater suppression than the left (p = 0.003). No gender differences were observed.

CONCLUSION: AM noises at moderate to high rates (50-100 Hz) are more effective MOCR activators than unmodulated noise. The efferent system demonstrates clear frequency-specific and lateralized efficacy, with maximal suppression at lower frequencies and in the right ear. These findings underscore the importance of the temporal characteristics of contralateral stimuli and suggest optimized MOCR assessment using ecologically relevant, fluctuating sounds.

PMID:42581692 | DOI:10.1002/brb3.71665

Prim Health Care Res Dev. 2026 Aug 12;27:e92. doi: 10.1017/S1463423626101637.

ABSTRACT

AIM: This study aims to evaluate the feasibility and educational impact of utilizing SHCs as primary care training sites in undergraduate medical education, with the goal of enhancing clinical competencies in young adult healthcare.

BACKGROUND: Family Medicine (FM) is essential for integrating community-based health services into medical education. In Turkey, final-year medical students complete a one-month rotation at Family Health Centers (FHCs). However, young adults often utilize Student Health Centers (SHCs) on university campuses, resulting in a gap in students’ experience with this age group. Addressing this, our programme initiated the inclusion of SHCs in the FM internship rotation for the 2024-2025 academic year.

METHODS: A mixed-methodology study was conducted in two phases. A retrospective analysis was performed on medical records of patients aged 18-25 who attended the SHC over a one-month period. A prospective 9-item online survey assessed the educational impact on final-year medical students following their FM internship, which included the SHC rotation. Descriptive and qualitative statistical analyses were performed to summarize the survey and clinical data.

FINDINGS: A total of 1228 patients were seen at the SHC, mirroring FHC trends. All 87 interns surveyed rated the FM programme initiative positively, with 94.1% highly satisfied and 85.9% reporting improved primary care skills. Qualitative feedback highlighted the value of practical experience and called for longer rotations.

CONCLUSION: Integrating SHC rotations into undergraduate medical education is both feasible and beneficial, providing relevant primary care experience for medical students and enhancing training in the care of young adult populations.

PMID:42581653 | DOI:10.1017/S1463423626101637

Biostatistics. 2026 Jan 20;27(1):kxag031. doi: 10.1093/biostatistics/kxag031.

ABSTRACT

Egocentric-network randomized trials (ENRTs) are increasingly used to estimate causal effects under interference when measuring complete sociocentric network data is infeasible. ENRTs rely on egocentric network sampling, where a set of egos is first sampled, and each ego recruits a subset of its neighbors as alters. Treatments are then randomized across egos. While the observed ego-networks are disjoint by design, the underlying population network may contain edges connecting them, leading to contamination. Under a design-based framework, we show that the Horvitz-Thompson estimators of direct and indirect effects are biased whenever contamination is present. To address this, we derive bias-corrected estimators and propose a novel sensitivity analysis framework based on sensitivity parameters representing the probability or expected number of missing edges. This framework is implemented via both grid sensitivity analysis and probabilistic bias analysis, providing researchers with a flexible tool to assess the robustness of the causal estimators to contamination. We apply our methodology to the HIV Prevention Trials Network 037 study, finding that ignoring contamination may lead to underestimation of indirect effects and overestimation of direct effects.

PMID:42581609 | DOI:10.1093/biostatistics/kxag031

J Health Psychol. 2026 Aug 11:13591053261472711. doi: 10.1177/13591053261472711. Online ahead of print.

ABSTRACT

The present study aimed to provide an initial validation of a scale designed to measure pregnancy-specific partner violence, focusing on abuse dynamics uniquely shaped by the gestational period. A total of 250 pregnant women were included for the purpose of exploratory factor analysis, while 302 pregnant women were included for confirmatory factor analysis. In addition to descriptive statistics, the Mann-Whitney U test, Kruskal-Wallis test, and Spearman correlation test were used for data analysis. The Cronbach’s Alpha value for the scale, comprising a single factor structure and a total of 20 items, was found to be 0.986, while the McDonald’s Omega coefficient was 0.988. A negative and statistically significant correlation was observed between the levels of partner violence and the levels of marital satisfaction reported by pregnant women (p < 0.05). It is suggested that the Pregnancy Partner Violence Scale provides promising preliminary evidence for assessing such violence, though further validation in diverse settings is warranted.

PMID:42581567 | DOI:10.1177/13591053261472711

Stomatologiia (Mosk). 2026;105(4):19-24. doi: 10.17116/stomat202610504119.

ABSTRACT

OBJECTIVE: Analysis of the implementation and use of telemedicine technologies in the field of maxillofacial surgery at the Federal Center of the National Medical Research Center “Central Research Institute of Maxillofacial Surgery” of the Ministry of Health of the Russian Federation in 2022-2024.

MATERIAL AND METHODS: The data of 3229 telemedicine consultations (TMC) in 88 constituent entities of the Russian Federation for the period 2022-2024 were ranked. The share of cases requiring patient routing to the federal center and additional examination was determined. The analysis of the availability and staffing of maxillofacial surgeons was carried out. The increase/decrease of indicators was calculated using the standard formula for relative change as a percentage. The relationship between indicators (population size, staffing, availability, number of CFLs and number of TMCs) was estimated using the Pearson correlation coefficient (r).

RESULTS: The total number of TMCs increased from 833 in 2022 to 1296 in 2024, an increase of 55.6%. The leader in absolute number of TMCs is the Volga Federal District. At the same time, a decrease in the number of consultations was noted in the North-Western District. The share of TMCs that required patient routing to the federal center was 26.6% in 2024. There was a steady increase in the share of cases that required additional examination: from 65% in 2022, 73.7% in 2023, and 69.5% in 2024. A moderate negative correlation was found between the number of doctors and the number of TMK (r≈-0.61…-0.64), and a weak positive correlation was found between the number of doctors and the volume of consultations (r≈0.37-0.38). Despite fluctuations in the number of doctors in 2023 and subsequent growth in 2024, the overall staffing increased by 5.8% over the three-year period.

CONCLUSION: The data obtained indicate that telemedicine technologies in maxillofacial surgery are an effective tool for increasing the availability of specialized and high-tech medical care, especially in regions with a severe shortage of personnel and a large territorial distance. TMC contributes to early diagnosis, clarification of treatment tactics, optimization of patient routing to federal centers, and strengthening the professional competencies of regional specialists.

PMID:42581521 | DOI:10.17116/stomat202610504119

Stomatologiia (Mosk). 2026;105(4):5-10. doi: 10.17116/stomat20261050415.

ABSTRACT

OBJECTIVE: Comparative assessment of water absorption and solubility of polymer materials for temporary restorations, differing in composition and technology of application (CAD/CAM, 3D printing, traditional analog method).

MATERIALS AND METHODS: Four materials were studied: Huge PMMA (CAD/CAM), Dental Sand Pro (3D printing), Sinma-M (hot polymerization) and Tempokor Automix (chemical curing). Samples in the form of discs (n= 4-8 per group) were made according to the requirements of GOST R 71412-2024. Water absorption (p_w) and solubility (p_s) tests were carried out in distilled water at a temperature of 37 ± 1 °C for 7 days. The statistical analysis was performed using the Student’s t-test.

RESULTS: Statistically significant intergroup differences were found (p<0.05). The highest water absorption was observed in the Dental Sand Pro 3D printing material (40.04±1.59 micrograms/mm³), which corresponds to the upper limit of the standard value. The values of p_w for Huge PMMA (26.76±1.70 micrograms/mm³) and Sigma-M (24.05±2.65 micrograms/mm³) are below the established limit. The solubility of Sinma-M (11.21±3.17 micrograms/mm³) exceeded the standard value (7.5 micrograms/mm³) and was significantly higher than that of Huge PMMA (0.78±0.16 micrograms/mm³) and Dental Sand Pro (4.32±1.44 micrograms/mm³). The Tempocor material showed satisfactory results in both parameters.

CONCLUSION: The water absorption and solubility of polymer materials for temporary restorations significantly depend on both the chemical composition and the manufacturing technology. Milled PMMA (CAD/CAM) demonstrated the greatest stability, while traditional materials showed high variability in properties. The results obtained should be taken into account in the clinical selection of the material to ensure the long-term success of orthopedic treatment.

PMID:42581519 | DOI:10.17116/stomat20261050415