Fig. 2

Differences in TBLH BMC and lean mass in females aged 15-17 years based on physical activity at age 6-9 years or age 9-11 years and age 15-17 years. Values are adjusted means (95% CI). Estimates for TBLH BMC are for a female at Tanner stage 4 in the control group with sex-specific mean levels of age, stature, lean mass and fat mass at measured at age 15 to 17 years, and TBLH BMC measured at age 6 to 9 years or age 9 to 11 years. Estimates for TBLH lean mass at age 15 to 17 years are for a female at Tanner stage 4 in the control group with sex-specific mean levels of age, stature, and fat mass at measured at age 15 to 17 years, and TBLH lean mass measured at age 6 to 9 years or age 9 to 11 years. a and c are for age 6 to 9 years to age 15 to 17 years. b and d are for age 9 to 11 years to age 15 to 17 years. For age 6 to 9 to age 15 to 17 years, the median split is based on 9 minutes at age 6 to 9 years and 15 minutes at age 15 to 17 years. For age 9 to 11 to age 15 to 17 years, the median split is based on 9 minutes at age 9 to 11 years and 14 minutes at age 15 to 17 years. For age 6 to 9 to age 15 to 17 years, n = 102 (persistently inactive n = 38, decreasingly active n = 13, increasingly active n = 26, persistently active n = 25). For age 9 to 11 to age 15 to 17 years, n = 103 (persistently inactive n = 36, decreasingly active n = 16, increasingly active n = 20, persistently active n = 31). BMC, bone mineral content; LM, lean mass; TBLH, total body less head