Scale Components Research Articles

Measurement Properties of Two Questionnaires Assessing Fear-Avoidance in Patients With Chronic Low Back Pain.

The Fear-Avoidance Components Scale (FACS) and the Fear of Daily Activities Questionnaire (FDAQ) assess fear-avoidance model components. However, the questionnaires are not available in Brazilian Portuguese. This study aimed to translate the original English FACS and FDAQ into Brazilian (Br) Portuguese and assess their measurement properties in patients with Chronic Low Back Pain (CLBP). One hundred thirty volunteers with CLBP participated in this study. Structural validity, internal consistency, test-retest reliability, and hypothesis testing for construct validity were analyzed. Results indicated a 2-factor solution for the FACS-Br, while the FDAQ-Br had a one-factor solution. Internal consistency showed acceptable Cronbach's alpha (alpha >.8). Suitable reliability was found for the FDAQ-Br (Intraclass Correlation Coefficient [ICC] = .98). For both FACS-Br factors, suitable reliability was found as well (ICC = .95 and .94). Hypothesis testing for construct validity confirmed more than 75% of the hypotheses proposed a priori for the FACS maladaptive pain/movement-related beliefs domain and the FDAQ-Br. In conclusion, the FACS-Br and FDAQ-Br demonstrated acceptable reliability, internal consistency, and structural validity measurement properties and their correlation (r < .50) suggests that the tools are not interchangeable measures.

A novel formulation of wind velocity spectrum incorporating rainfall influence

Wind-rain interaction constitutes a common physical phenomenon in nature. Nevertheless, in fluid mechanics and wind engineering, whether and how rainfall influences wind remains an unresolved challenge. This study relies on a substantial dataset obtained through on-site measurement. Initially, three distinct rainfall categories—light rain, moderate rain, and heavy rain—are established based on the magnitude of vertical wind velocity. Notably, significant disparities in the high-frequency constituents of the fluctuating wind velocity spectrum are discerned across various rainfall levels. Subsequently, a rigorous quantitative analysis explores the relationship between the high-frequency cumulative energy proportion of the fluctuating wind velocity spectrum and rainfall intensity, leading to formulations that delineate the high-frequency cumulative energy proportion in the alongwind, acrosswind, and vertical wind directions as explicit functions of rainfall intensity. Moreover, a comprehensive unified expression models the three-dimensional fluctuating wind velocity spectrum. This expression incorporates parameters encompassing the relative scales of fluctuation and mean components, the extent of conversion between high and low-frequency energy, and the scaling laws governing the inertial subrange. Additionally, explicit functional dependencies for these parameters concerning variations in rainfall intensity are provided. The novel formulation of the fluctuating wind velocity spectrum proposed in this study bears substantial scientific significance, as it facilitates a deeper understanding of wind-rain interaction and offers valuable insights for conducting intricate environmental flow field simulations.

Evaluation of Maximal Reliability for Multidimensional Measuring Instruments Using Structural Equation Modeling

Multidimensional measuring instruments are often used in behavioral, social, educational, marketing, and biomedical research. For these scales, the paper discusses how to find the optimal score based on their components that is associated with the highest possible reliability. Within the framework of structural equation modeling, an approach to point and interval estimation of the maximal reliability coefficient of general structure measuring instruments is outlined. The procedure allows obtaining in addition the linear combination of all scale components that possesses maximal reliability. The described method is applicable in empirical research with popular statistical software, and is illustrated using an example.

Review on Advanced Storage Control Applied to Optimized Operation of Energy Systems for Buildings and Districts: Insights and Perspectives

In the context of increasing energy demands and the integration of renewable energy sources, this review focuses on recent advancements in energy storage control strategies from 2016 to the present, evaluating both experimental and simulation studies at component, system, building, and district scales. Out of 426 papers screened, 147 were assessed for eligibility, with 56 included in the final review. As a first outcome, this work proposes a novel classification and taxonomy update for advanced storage control systems, aiming to bridge the gap between theoretical research and practical implementation. Furthermore, the study emphasizes experimental case studies, moving beyond numerical analyses to provide practical insights. It investigates how the literature on energy storage is enhancing building flexibility and resilience, highlighting the application of advanced algorithms and artificial intelligence methods and their impact on energy and financial savings. By exploring the correlation between control algorithms and the resulting benefits, this review provides a comprehensive analysis of the current state and future perspectives of energy storage control in smart grids and buildings.

A - 41 Relationship between Fear-Avoidance Behavior, Clinical Outcomes, and Recovery Time in Adults Following Concussion

Abstract Purpose To examine the relationship between fear-avoidance behavior, clinical outcomes, and recovery time in adults following concussion. Method This prospective study included patients aged 18–50 years who presented to a specialty clinic 5–30 days post-concussion. Participants completed a clinical intake (e.g., demographics/medical history), multidomain clinical assessment (Clinical Profile Screen [CP-Screen], Immediate Post-concussion Cognitive Testing [ImPACT], Vestibular/Ocular Motor Screen [VOMS], Patient Health Questionnaire-9 [PHQ-9], Generalized Anxiety Disorder-7 [GAD-7]), and the Fear-Avoidance Components Scale (FACS). Recovery time was ascertained at a subsequent visit(s). Fear-avoidant (FA) and non-fear-avoidant (NFA) groups were classified using cutoffs from the FACS (FA = 41–100; NFA = 0–40) and compared using independent samples t-tests, X2 tests, and analyses of covariance. Results Seventy-two participants (M = 28.7¬ ± 8.5 years, 69.4% female) were included: 37 (51.4%) in the FA and 35 (48.6%) in the NFA group. Groups did not differ on demographics, medical history, injury characteristics, or CP-Screen. A greater proportion of the FA group had the anxiety/mood profile (62.2% vs 31.4%, p &amp;lt; 0.01). The FA group had worse ImPACT reaction time (t(68) = −2.7, p &amp;lt; 0.01, d = −0.7), VOMS visual motion sensitivity (t(67) = −2.3, p = 0.03, d = −0.5), GAD-7 (t(70) = −3.9, p &amp;lt; 0.01, d = −0.9), and PHQ-9 (t(69) = −2.8, p &amp;lt; 0.01, d = −0.7) scores, and longer recovery (t(24) = −2.8, p = 0.01, d = −0.9), even when controlling for age and time to clinic (F[1, 22] = 4.6, p = 0.04, ηp2 = 0.17). Conclusions Adults who reported high fear-avoidance (e.g., avoiding activity, catastrophizing) had worse clinical outcomes and longer recovery following concussion compared to non-fear-avoidant adults, despite no differences in demographics, medical history, injury characteristics, or symptoms. Clinicians should screen for and counsel adults post-concussion against engaging in fear-avoidance behaviors to improve recovery outcomes.

Comparison of Postoperative Seizures Between Burr-Hole Evacuation and Craniotomy in Patients With Nonacute Subdural Hematomas: A Bi-Institutional Propensity Score-Matched Analysis.

Postoperative seizures are a common complication after surgical drainage of nonacute chronic subdural hematomas (SDHs). The literature increasingly supports the use of prophylactic antiepileptic drugs for craniotomy, a procedure that is often associated with larger collections and worse clinical status at admission. This study aimed to compare the incidence of postoperative seizures in patients treated with burr-hole drainage and those treated with craniotomy through propensity score matching (PSM). A retrospective cohort analysis was conducted on patients with surgical drainage of nonacute SDHs (burr-holes and craniotomies) between January 2017 to December 2021 at 2 academic institutions in the United States. PSM was performed by controlling for age, subdural thickness, subacute component, and preoperative Glasgow Coma Scale. Seizure rates and accompanying abnormalities on electroencephalographic tracing were evaluated postmatching. A total of 467 patients with 510 nonacute SDHs underwent 474 procedures, with 242 burr-hole evacuations (51.0%) and 232 craniotomies (49.0%). PSM resulted in 62 matched pairs. After matching, univariate analysis revealed that burr-hole evacuations exhibited lower rates of seizures (1.6% vs 11.3%; P = .03) and abnormal electroencephalographic findings (0.0% vs 4.8%; P = .03) compared with craniotomies. No significant differences were observed in postoperative Glasgow Coma Scale (P = .77) and length of hospital stay (P = .61). Burr-hole evacuation demonstrated significantly lower seizure rates than craniotomy using a propensity score-matched analysis controlling for significant variables.

Impact of visual and textural characteristics of street walls on stress recovery

Rapid urbanization increases psychological stress among pedestrians, potentially heightening mental health disorders. This study examines the role of street walls' visual and textural characteristics in stress recovery, using Qingdao as a case study. Virtual reality is employed to simulate five distinct street walls: yellow mortar, brown stone, red brick, green plant, and white mortar. The stress recovery effectiveness of these walls was evaluated through psychological and physiological indicators from 48 young college students. Results indicated that street walls with warm tones, particularly brown stone, significantly aid stress recovery. Psychologically, Restorative Components Scale was highest for brown stone at 1.13. Physiologically, it was linked with notable reductions in diastolic and pulse pressure (decreases of 2.95 mmHg and 2.27 mmHg, respectively), and enhanced parasympathetic activity, as evidenced by the fastest decrease in low frequency/high frequency ratio (LF/HF), and increases in pNN50 and RR (0.14–2.01% and 1.57–11.81 ms, respectively). For urban design, the incorporation of warm-toned materials and natural elements like stone is recommended for their superior restorative benefits.

Causal association between family health, perceived relationship quality components, and attitudes toward childbearing in Iranian women: A WHO model analysis.

Given the unprecedented global decline in fertility as a major demographic development in recent years, the present study was conducted to determine Causal association Between Family Health, Perceived Relationship Quality Components, and Attitudes toward Childbearing in Iranian Women: A WHO Model Analysis METHODS: In 2023, this descriptive study recruited 400 married women presenting to selected comprehensive health centers affiliated to Alborz University of Medical Sciences, Karaj, Iran. The data were collected through multistage stratified cluster sampling and using a socioeconomic status questionnaire (Ghodratnama), the Perceived Relationship Quality Components (PRQC) scale, the family-of-origin scale (FOS), the attitudes toward fertility and childbearing scale (AFCS) and a demographic checklist were analyzed in SPSS 25 and LISREL 8.8. According to the path analysis, family health exerted the most significant and positive causal effect on attitudes to childbearing directly through one path (B=0.334) and relationship quality (B=0.698) and duration of married life (B=0.387) both directly and indirectly. The number of children (B=-0.057), however, exerted the most significant and negative causal effect on attitudes to childbearing through both paths. The present findings suggested the significant effects of family health and relationship quality on attitudes toward childbearing. It is therefore recommended that these variables be screened in comprehensive health centers, the associated limitations and problems be identified and appropriate training and counseling solutions be provided by health specialists.

Attempt to compensate for effects of energy conservation error on static pressure fluctuation using sub-grid scale components with the Reynolds number dependence of isotropic/anisotropic steady turbulence

Attempt to compensate for effects of energy conservation error on static pressure fluctuation using sub-grid scale components with the Reynolds number dependence of isotropic/anisotropic steady turbulence

Fractional CO2 Laser for Burn Scars: A Comparison of Patient-Reported Outcomes Between Those With and Without Laser Treatment.

Burn reconstruction outcomes are an area of growing investigation. Although there is evidence of measured physical improvements in scar characteristics after laser treatment, there is little information on patient-reported outcomes. The purpose of this study is to compare patient-reported outcomes between burn survivors with and without laser treatment. The study included participants in the Burn Model System National Database at a single center; participants that received outpatient laser treatment for burn scars were compared to a matched group of burn survivors that did not receive laser. The following outcomes were examined: Satisfaction With Life Scale, Mental and Physical Component Summary of the Veterans Rand Survey, and the Patient-Reported Outcomes Measurement Information System (PROMIS) Pain Intensity Scale. Regression analyses examined the associations between laser treatment and each outcome at 12 and 24 months. The study population included 287 adult burn survivors (65 laser group and 222 control group). The significant differences found between the 2 groups included: burn size (laser: 14.9, 13.5 SD, control: 8.9, 11.1 SD; P < .001), insurance type (P = .036), inhalation injury (laser: 17.2%, control: 2.7%; P < .001), and ventilator requirement (laser: 27.7%, control: 13.5%; P = .013). Laser treatment was not associated with any of the outcomes at both follow-up time points. Further research is needed to develop patient-reported outcome measures that are more sensitive to the clinical changes experienced by burn survivors receiving laser treatment.

Back to the Village: Assessing the Effects of Naturalness, Landscape Types, and Landscape Elements on the Restorative Potential of Rural Landscapes

Rural landscapes are acknowledged for their potential to restore human health due to natural characteristics. However, modern rural development has degraded these environments, thereby diminishing the restorative potential of rural landscapes. Few studies have systematically analyzed the impact of naturalness, landscape types, and landscape elements on restorativeness using both subjective and objective measurements. This study investigated the restorative effects of various rural landscapes in Guangzhou, employing electroencephalography and eye-tracking technologies to record physiological responses and using the Restorative Components Scale and the Perceived Restorativeness and Naturalness Scale to evaluate psychological responses. The results indicated the following: (1) There was a significant positive correlation between perceived naturalness and restorativeness, surpassing the impact of actual naturalness. (2) Different landscape types had varying impacts on restorativeness at the same level of perceived naturalness. Natural forest landscapes, artificial forest landscapes, and settlement landscapes exhibited the most substantial restorative effects among the natural, semi-natural, and artificial landscapes examined, respectively. (3) Restorative properties varied across landscape elements: trees and water significantly enhanced restorativeness, whereas constructed elements reduced it. Findings from this study can provide support for policymakers to make informed decisions regarding the selection and arrangement of rural landscape types and elements to enhance mental health and well-being.

Bearing Steel Structures for Installation of Railway Strain Gauge Scales

Purpose. The main purpose of the publication is to compare the main technical and economic indicators of the two proposed structural variants of the support system for railway strain gauge scales for four-axle wide gauge railcars. This is due to the need to reconstruct and modernize the fixed assets of an industrial enterprise, in particular, to overhaul and replace old railway scales with modern electronic strain gauge scales. Also, the purpose of the work is related to the need to expand the range of railway cars for which the possibility of weighing is provided, including transport units of the foreign car fleet. Methodology. To achieve this goal, we analyzed the modern types of railroad cars for freight transportation, determined the main components of strain gauge scales for weighing the main types of cars, and developed a special support system to support the scale platform. The support system is provided in two design variants - with one spatial support frame and two separate flat support frames. Using the domestic design and computing complex SCAD, we built finite element models for both proposed design options. Based on the analysis of their stress-strain state, rational cross-sections were selected for each structural element, and the total mass was determined. Findings. A comparative analysis of the two developed structural solutions for the support system for modern railway strain gauges has revealed that the variant with two separate bearing frames has a lower weight by about 40 % compared to the variant with one spatial bearing frame. However, the manufacturability of its production is somewhat lower, since it involves 10 structural elements compared to 7 for variant No. 1. Originality. The numerical analysis made it possible to theoretically substantiate a more rational and efficient design solution for the support system for modern railway strain gauge scales. Practical value. A constructive variant of the steel support system has been developed and proposed for practical implementation, which is the most effective in terms of its technical and economic indicators for the existing conditions of an existing industrial enterprise. The developed design option was also coordinated with the project of major reconstruction of the building for weighing railroad cars.

Multi-scale image-based damage recognition and assessment for reinforced concrete structures in post-earthquake emergency response

As cities continue to develop, the significance of resilience and intelligence is increasing. In post-earthquake emergency response, there is a continuous demand for efficient and accurate methods of structural state assessment. This study employs deep learning (DL) techniques to propose a multi-scale image-based damage recognition and assessment method for reinforced concrete (RC) structures. First, an RC structural damage recognition task framework and a structural mechanical damage image dataset are established. Second, a DL model is selected to conduct the experiments and enhance its performance through transfer learning. Then, a multi-scale correlated structural state assessment procedure is introduced where local, component, structural, and regional scales are linked. Finally, an engineering case is presented to describe the application steps of the method in real-world scenarios, demonstrating its feasibility. Nevertheless, the proposed method lacks comprehensive validation across various geotechnical conditions and detailed structural configurations, which may limit its generalizability. This study has the potential to enhance the efficiency and scope of post-disaster emergency response and contribute to the development of sustainable cities.

Influence of travel speed on microstructure and mechanical behavior of Inconel 625 fabricated using wire fed laser directed energy deposition

The printing of Inconel 625 via wire-fed laser directed energy deposition is required for the near net shape fabrication of large scale components. In this study, an array of processing parameters was tested to identify a defect-free low-travel-speed and high-travel speed parameter for wire-fed laser directed energy deposition of Inconel 625. Samples printed using these parameters were subject to characterization in terms of grain morphology and tensile properties. Results showed that the high-travel-speed parameter had a refined columnar+equiaxed grain structure, whereas the low-travel-speed parameter had a columnar grain structure. The experimentally observed microstructure is correlated to the processing parameters by calculation of the solidification rate and thermal gradient. When tested perpendicular to the build direction, both parameters exhibited a similar yield strength. When tested parallel to the build direction, the high-travel-speed parameter exhibited a higher yield strength than the low-travel-speed parameter. For both parameters, samples pulled parallel to the build-direction showed a lower yield strength than samples pulled perpendicular to the build direction. The differences in yield strength for differing parameters and orientation are attributed primarily to dislocation strengthening.

Translation, cross-cultural adaptation, and measurement properties of the Arabic version of the fear avoidance components scale

Purpose This study aimed to translate, validate, and cross-culturally adapt the original FACS into the Arabic language. Methods The English version of the FACS was translated and culturally adapted into Arabic following international guidelines. The psychometric properties of the final version of the FACS-Arabic (FACS-A) were tested among 119 patients with different musculoskeletal (MSK) pain disorders. Results The Cronbach’s α for the FACS-A was 0.86. The test-retest reliability, measured with intraclass correlation coefficient, was 0.80. The FACS-A showed positive significant correlations with other psychological patient-reported measures, including the pain catastrophizing scale (PCS) (r = 0.545); p ≤ 0.01), Brief Pain Inventory (BPI)-pain score (r = 0.546; p ≤ 0.01), BPI-pain interference score (r = 0.511; p ≤ 0.01), and Hospital Anxiety and Depression Scale (HADS) (r = 0.451, 0.336, respectively; p ≤ 0.01). Confirmatory factor analysis of the FACS-A confirmed the two-factor structure found in the original English version. Conclusion This study determined the FACS-A to be a reliable and valid tool for the assessment of the fear-avoidance beliefs in Arabic-speaking individuals with MSK pain disorders.

Correction: Cross-cultural translation and psychometric validation of the French version of the Fear-Avoidance Components Scale (FACS)

Correction: Cross-cultural translation and psychometric validation of the French version of the Fear-Avoidance Components Scale (FACS)

Ab Initio Characterization of the CO2-Water Interface Using Unsupervised Machine Learning for Dimensionality Reduction.

Precise characterization of the supercritical CO2-water interface under high pressure and temperature conditions is crucial for the geological storage of carbon dioxide (CO2) in deep saline aquifers. Molecular dynamics (MD) simulations offer a valuable approach to gaining insight into the CO2-water interface at a microscopic level. However, no attempt has been made to characterize the CO2-water interface with the accuracy afforded by ab initio calculations. In this study, we performed ab initio MD (AIMD) simulations to investigate the structural and dynamical properties of the CO2-water interface, comparing the results with those obtained from classical force-field MD (FF-MD) simulations. Molecular orientation at the interface was well reproduced in both AIMD and FF-MD simulations. Characteristic structural fluctuations of water at the interface were unveiled by applying multidimensional scaling and time-dependent principal component analysis to the AIMD trajectories; however, they were not prominent in the FF-MD simulations. Furthermore, our study demonstrated a marked difference in the residence time of molecules in the interface region between AIMD and FF-MD simulations, indicating that time-dependent properties of the CO2-water interface strongly depend on the description of the intermolecular forces.

Personalised app-based information for patients with breast cancer: A pilot study to assess the efficacy and usability of the Answers 4 Cancers app.

e13796 Background: While most Irish oncology patients (pts) report searching for information online, they encounter challenges finding accurate, illness-specific information and understanding the content. Irish oncology pts typically use international online resources due to limited dedicated Irish sources. Information from the clinic is often poorly retained, with up to 40-80% immediately forgotten. Following the development of a successful patient information podcast, Answers 4 Cancers, we launched an app providing personalised patient information to address this resource gap. To our knowledge, this is the first app for oncology pts incorporating individual patient onboarding by healthcare professionals to provide tailored patient-specific information. Supportive self-management with app-based information has been shown to save nursing hours, improving burden on resources, and is aligned with the goals of the Irish National Cancer Strategy 2017-2026. Aim: To assess the usability of our app and its efficacy in providing relevant and useful information to pts. Methods: Pts with early stage breast cancer receiving (neo)adjuvant chemotherapy, with or without immunotherapy, at 2 Irish cancer centres, were enrolled in a pilot study. Pts downloaded the app and met with a specialist nurse who onboarded the pt and streamlined the information in the app based on their individual diagnosis and treatment plan. Information available on the app is curated from reliable sources and includes mental health and sexual wellbeing resources, clinical trials information, and personalised information on diagnosis, chemotherapy regimen, planned surgery and adjuvant treatments. Pts completed an online questionnaire, which included components of the System Usability Scale, ≥1 week following app download. Results: 13 pts were enrolled and received access to the app. All pts were female. The median age was 45 yrs. Median length of time from app download to questionnaire completion was 21 days. 7 pts (54%) completed questionnaires. 100% (7/7) of patients reported that they would like to use the app frequently, felt more confident in their treatment plan after using the app, and would recommend the app to other pts. 100% (7/7) of pts found the app easy to use and found all the information in the app relevant to their treatment plan. Recruitment is ongoing. Conclusions: This pilot study confirms that an app with a personalised platform is feasible and beneficial to Irish cancer pts and may be applicable to other health jurisdictions. We plan to progress our app as a national project to support the goals of the National Cancer Strategy and facilitate empowering pts to take an active role in their care. Next phases of development include symptom tracking and in-app communication between pts to develop support networks, and assessing the impact of the app on nursing time saved.

Data Sets Formation on the Physical Properties of Oxide Scale Components for Theoretical Assessment of Efficiency Parameters of Laser Cleaning of Carbon Steels and Related Processes

There is a need in machine-building industries nowadays to automate technologies, in particular, laser ones, to remove surface oxide layers – mill scale, rust – from steel products/pieces in order to improve the energy effectiveness of processing. Herewith, a theoretical assessment method for the intensity of heating of the oxide layer and the phase transition in it can be used to optimize laser cleaning (LC) of the steel surface. To realize this, it is possible to use some calculation and modeling procedures that require, as a first step, the data collection and verification on the temperature-dependent properties of iron-containing condensed phases, as possible components contained, in particular, in scale, which is typically widespread into various metal products. In this regard, the formation of database for characteristics of oxide scale components by the way of selection of information on thermophysical (including optical) properties of the components mentioned and of steel base, which are required for a reliable calculation of the thermal efficiency parameters of the technology for laser cleaning of carbon steels, as well as such actively developed related technologies as laser cutting, drilling, coating remelting, etc., was chosen as the task of our research. An analytical overview of published experimental data made it possible to systematize information on a number of transport and other physical properties of iron-containing components at ambient pressure, including thermal conductivity (k) and diffusivity (a), density ρ, irradiation absorptance and integral emissivity in the temperature range from T ≈ 298 K to the melting temperatures of oxide and metal phases and above them. At the same time, a preliminary thermochemical estimation shows (on the calculated data) the existence of such thermodynamically stable forms of the condensed phase in the heating spot of scale layers during its LC at the melting point and above it, as Fe3O4, FeO, and Fe, which is consistent with known experimental data. Comparison of the values of a calculated by us (using the published values of k, ρ and molar heat capacity and using extrapolation in the high-temperature region) for the types of scale components under consideration with a set of experimental values of this parameter in current literature revealed the presence of differences for both oxide and metal phases. These new values make it possible to fill in a gap in the temperature range T = 1600–1800 K that existed in the data on the thermal diffusivity. The value of a = (0.83–0.92)·10–6 m2/s was also calculated for liquid iron oxide for the T ≈ 1800 K, which was not measured experimentally, that, obviously, prevented modeling of not only laser surface processing, melting and cleaning of steels, but also calculations in the field of metallurgical and other technologies, which are characterized by the presence of iron oxide melts during heating.

Genetic variation and phylogenetic analysis of 23 STR in Chinese Han population from Hainan, Southern China.

The forensic characteristics and genetic relationships of Hainan Han population are still not fully understood. The aim of this study was to investigate the forensic features and genetic variations of 23 short tandem repeat (STR) included in the HuaxiaTM Platinum system in Hainan Han and analyze the population genetic relationships between Hainan Han and other adjacent Chinese populations. The genetic polymorphisms of 23 STR loci included in the HuaxiaTM Platinum kit were evaluated from 2971 Hainan Han individuals. Comprehensive comparisons were conducted based on genetic distance, phylogenetic tree, multidimensional scaling and principal component analysis (PCA) to explore inter-population genetic relationship. The combined power of discrimination (CPD) and the combined power of exclusion (CPE) of the 23 STR loci was 0.999 999 999 999 999 999 999 999 999 819 and 0.999 999 999 625 408, respectively. The investigated Hainan Han population has high genetic similarity with geographically close Han populations, while great genetic difference with other ethnic minorities, prominently in Yunnan Miao, Xinjiang Uygurs, Xinjiang Kazakh, and Tibetans. Our study found the 23 STR loci were highly polymorphic and suitable for forensic personal identification and paternity testing in Hainan Han population. Genetic similarity widely existed among Han populations from different regions, and significant genetic divergence existed between Han populations and some ethnic minorities. The populations genetic diversity and similarity were closely associated with ethnic origin and geographical distribution.