[Objective]To explore the occurrence characteristics and risk factors of bone stress injuries(BSI)in recruits of an army training base.[Methods]The recruits were randomly selected from a training base of the army from 2021 to 2023.The data were collected through questionnaire survey and inspection,and their epidemiological characteristics were summarized and analyzed.[Results]A total of 11 627 valid questionnaires were collected,among which 1 626 recruits were diagnosed with BSI(14.0％),including 1 010 cases of tibia in-jury,accounted for 62.1％.As results of univariate comparison,the injured group proved significantly higher than the uninjured group in terms of the proportion of female[n,male/female,(1 583/43)vs(9 981/190),P=0.047],age[(21.3±2.4)y vs(21.1±2.0)y,P=0.002],BMI[(22.6±2.5)kg/m2 vs(22.4±2.3)kg/m2,P=0.004],smoking[n,yes/no,(679/947)vs(3 625/6 379),P＜0.001],PSQI score[(4.6±2.8)vs(2.3±2.3),P＜0.001]and previous sports injury before joining the army[n,yes/no,(173/1453)vs(618/9383),P＜0.001],while the former was infe-rior to the latter in terms of diet[n,good/fair/poor,(5 048/4 033/920)vs(533/829/264),P＜0.001],sleep[n,excellent/good/fair/poor,(6 063/2 782/1 026/130)vs(724/575/271/56),P＜0.001],exercise habits[n,never/occasionally/often,(673/2 611/6 717)vs(259/577/790),P＜0.001],foot arch[n,normal/abnormal,(8 938/1 063)vs(1 394/232),P＜0.001],ligament relaxation score[n,＜3/≥3,(8 397/1 604)vs(1 320/306),P=0.005],scores of 3 000 m running[n,excellent/good/fair,(1 140/4 756/4 105)vs(127/576/923),P＜0.001]and sit-ups[n,excellent/good/fair/poor,(2 473/3 604/3 479/445)vs(320/522/644/140),P＜0.001].Regarding binary multivariate logistic regression analysis,male(OR=0.630,P＜0.05),good diet(OR=0.786,P＜0.05),non-injury before enlistment(OR=0.747,P＜0.05)were the protective factor of BSI oc-currence,whereas higher PSQI score(OR=1.335,P＜0.05),less exercise before joining the army(OR=1.440,P＜0.05),abnormal foot arch(OR=1.176,P＜0.05)and poor performance at 3 000 m running(OR=1.460,P＜0.05)were the independent risk factor for the injury.[Con-clusion]The incidence of bone stress injury was 14.0％,with highest involved site of the tibia.Gender,diet quality,exercise injury before military service,exercise habits before military service,PSQI score,foot arch shape and 3 000 m running performance could be used as risk assessment indicators of bone stress injury.
bone stress injuryepidemiological investigationrisk factorsrecruit training
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