Table 2 Tracking of device-measured physical activity from 9 to 24 years of age

9–24 (n = 640)

Estimate (95% CI)

Estimate (95% CI)

Estimate (95% CI)

Estimate (95% CI)

Stability Coefficient*

0.22 (0.14, 0.29)

0.22 (0.14, 0.29)

0.18 (0.09, 0.26)

0.16 (0.08, 0.24)

Odds Ratio

 Lowest Quartile

1.92 (1.33, 2.76)

2.10 (1.46, 3.01)

1.88 (1.23, 2.86)

1.87 (1.21, 2.87)

 Highest Quartile

1.44 (0.99, 2.08)

1.38 (0.97, 1.97)

1.07 (0.69, 1.66)

1.15 (0.75, 1.76)

9–15 (n = 458)

Stability Coefficient*

0.29 (0.21, 0.37)

0.28 (0.20, 0.36)

0.24 (0.15, 0.33)

0.23 (0.13, 0.32)

Odds Ratio

 Lowest Quartile

2.23 (1.47, 3.39)

2.65 (1.75, 4.03)

2.18 (1.34, 3.55)

2.41 (1.47, 3.96)

 Highest Quartile

1.83 (1.17, 2.85)

1.67 (1.10, 2.55)

1.23 (0.73, 2.08)

1.40 (0.85, 2.30)

15–24 (n = 163)

Stability Coefficient*

0.00 (− 0.15, 0.15)

0.06 (− 0.09, 0.21)

−0.05 (− 0.22, 0.12)

0.04 (− 0.14, 0.21)

Odds Ratio

 Lowest Quartile

1.54 (0.74, 3.22)

1.72 (0.86, 3.47)

1.78 (0.68, 4.68)

1.92 (0.79, 4.69)

 Highest Quartile

0.80 (0.39, 1.67)

1.75 (0.90, 3.41)

0.86 (0.34, 2.16)

1.74 (0.74, 4.08)