Examining Measures of Weight as Risk Factors for Sport-Related Injury in Adolescents

Table 1

Baseline characteristics by sex.

	Boys	Girls
Frequency, %	427 (41.0)	613 (58.9)
Age (median, IQR)	13 (12-13)	13 (12-13)
BMI (mean, 95% CI)	19.5 (19.2–19.8)	19.3 (19.1–19.5)
Missing ()	9	9
Unhealthy BMI (%, 95% CI)	15.3 (11.9–18.9)	9.0 (6.7–11.2)
WC (mean, 95% CI)	69.2 (68.4–70.1)	66.5 (66.0–67.1)
Missing ()	7	9
Unhealthy WC (%, 95% CI)	24.8 (20.7–28.9)	22.7 (19.4–26.0)
Sport participation (median, IQR)	52.0 (32.0–80.0)	52.0 (31.0–77.0)
Aerobic fitness (mean, 95% CI)	42.6 (41.8–43.3)	36.8 (36.3–37.3)
Missing ()	11	25
Vertical jump (cm)	36.9 (36.1–37.8)	31.2 (30.7–31.7)
Missing ()	28	39
Previous injury^† (%, 95% CI)	23.5 (19.5–27.6)	22.4 (19.1–25.8)
Missing ()	6	7

BMI: body mass index (kg/m²). WC: waist circumference (cm).
Total sport participation over study period (hours). Indirect measure of aerobic fitness. ^†Injury reported in the previous 12 months (frequency).