Models to predict injury, physical fitness failure and attrition in recruit training: a retrospective cohort study

Table 4 Retained predictors and associated areas under the ROC curves for the models with both courses combined

Outcome	Retained Predictors	Nagelkerke R²	AUC
Any injury	Sex, Age, BMI, Init-SU, Init-Shuttle^a, Course^b	0.11	0.66
Overuse injury	Sex, Age, BMI, Init-SU, Init-Shuttle^a, Course^b	0.11	0.68
Stress fracture	Ht, Init-Shuttle, Course^b	0.10	0.78
Neuromuscular injury	Sex, Age, BMI, Init-SU, Init-shuttle^a, Course^b	0.11	0.66
Traumatic injury	Sex, BMI, Init-SU, Init-shuttle, Init-SU^a, Course^b	0.05	0.63
Attrition	Age, Init-shuttle^a	0.02	0.59
Final BFA battery failure	Ht, Wt, Age, Init-PU^a, Init-SU^a, Init-Shuttle^a, Course^b	0.14	0.70

AUC Area under the ROC curve, Init-PU Push-up repetitions obtained upon arrival at the basic training site, Init-SU Sit-up repetitions obtained upon arrival at the basic training site, Init-shuttle Shuttle run level obtained upon arrival at the basic training site, Ht Height in cm, Wt Weight in kg, BMI Body mass index in kg/m², BFA Basic Fitness Assessment; ^aFailure. Dichotomized pass/fail version of the predictor variable; ^bCourse number

ISSN: 2054-9369