TABLE 2.

Associations of Age, BMI, Menarcheal Status, and Activity With a History of Stress Fracture Among the Girls in GUTS

OR, Adjusted for Age (95% CI)OR, Adjusted for All Covariates in Model (95% CI)
Age1.28 (1.12–1.46)
BMI z score0.91 (0.78–1.07)0.97 (0.81–1.16)
Postmenarcheal0.61 (0.40–0.95)0.62 (0.38–0.99)
<4 h/wk of activity*1.00 (referent)1.00 (referent)
4–7.9 h/wk of activity0.71 (0.41–1.21)0.66 (0.39–1.14)
8–11.9 h/wk of activity0.94 (0.55–1.60)0.90 (0.53–1.52)
12–15.9 h/wk of activity0.94 (0.53–1.70)0.89 (0.50–1.60)
≥16 h/wk of activity1.86 (1.16–3.00)1.88 (1.18–3.03)
  • There were 146 cases among 5219 girls with complete data. The ORs are from a generalized estimating equation model that adjusted for the covariates listed in the table. Information on correlates came from the 1998 GUTS questionnaire.

  • * Sum of basketball, baseball, biking, dance/aerobics, hockey, running, swimming, skating, skateboarding, soccer, tennis, cheerleading, lifting weights, volleyball, and karate.