Table 1 Participant characteristics

Age (N)

 12 years old

716

461

171

 13 years old

1,926

1,565

333

 14 years old

1,545

1,367

71

 15 years old

787

791

10

Height (cm)^a

160.24 ± 8.91

155.14 ± 5.42

151.18 ± 6.11

Weight (kg)^a

50.25 ± 11.23

48.57 ± 7.64

38.84 ± 5.18

Body mass index (kg/m²)^a

19.4 ± 3.2

20.2 ± 2.8

17.0 ± 1.7

OSI^a

2.72 ± 0.31

2.80 ± 0.31

2.56 ± 0.24

Milk intake per day during PS (mL)^b

257.14

178.57

178.57

Current milk intake per day (mL)^b

242.85

178.57

171.42

Exercise habits, N (%)

 None

380 (7.6)

980 (23.4)

103 (17.6)

 Only during PS

174 (3.5)

458 (10.9)

52 (8.9)

 Only current

1,132 (22.8)

1,006 (24.0)

163 (27.9)

 Both during PS and currently

3,288 (66.1)

1,740 (41.6)

267 (45.6)

Bone fracture during the preceding year, N (%)

 Yes

437 (8.8)

192 (4.6)

24 (4.1)

 No

4,537 (91.2)

3,992 (95.4)

561 (95.9)