Table 1.

Characteristics of the Study Sample at Baseline

	All (N = 784)	Males (n = 361)	Females (n = 423)
Age (years), mean (SD)	11.0 (4.60)	11.0 (4.56)	11.0 (4.64)
Tanner I, n (%)	408 (52.0)	195 (54.0)	213 (50.4)
Tanner II–IV, n (%)	192 (24.5)	76 (21.1)	116 (27.4)
Tanner V, n (%)	184 (23.5)	90 (24.9)	94 (22.2)
Genetic risk score, mean (SD), %
Overall adult	50.1 (4.04)	49.9 (4.13)	50.3 (3.95)
Fracture	49.4 (7.92)	48.9 (8.24)	49.9 (7.61)
WNT	48.4 (11.30)	47.9 (11.56)	48.8 (11.06)
Mesenchymal	53.2 (19.64)	52.7 (19.63)	53.6 (19.66)
RANK-RANKL-OPG	42.0 (19.21)	42.8 (19.33)	41.3 (19.09)
Pediatric	41.5 (11.4)	41.4 (11.38)	41.6 (11.48)

The descriptive data are for the participants with total body less head bone mineral content data (TBLH-BMC) at baseline. The overall adult and subtype GRS did not differ between males and females (p > 0.05).