1-s epoch | 5-s epoch | 15-s epoch | 30-s epoch | 60-s epoch | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Model 1 | Model 2 | Model 1 | Model 2 | Model 1 | Model 2 | Model 1 | Model 2 | Model 1 | Model 2 | |||||||||||
β(95% CI) | β(95% CI) | β(95% CI) | β(95% CI) | β(95% CI) | β(95% CI) | β(95% CI) | β(95% CI) | β(95% CI) | β(95% CI) | |||||||||||
TBLH BMC (g) | ||||||||||||||||||||
Average-acceleration | 25.61 (-10.02 to 61.25) | 0.16 | 2.54 (-36.46 to 41.53) | 0.90 | 25.61 (-10.02 to 61.25) | 0.16 | 8.39 (-29.33 to 46.11) | 0.66 | 25.61 (-10.02 to 61.25) | 0.16 | 5.71 (-35.88 to 47.29) | 0.79 | 25.61 (-10.02 to 61.25) | 0.16 | 4.44 (-41.06 to 49.95) | 0.85 | 25.61 (-10.02 to 61.25) | 0.16 | 3.54 (-48.14 to 55.23) | 0.89 |
Intensity-gradient | 47.64 (24.11 to 71.17) | < 0.001 | 46.47 (18.40 to 74.55) | 0.001 | 36.32 (6.67 to 65.96) | 0.02 | 32.43 (0.20 to 64.66) | 0.05 | 36.47 (7.14 to 65.81) | 0.02 | 33.60 (-2.33 to 69.53) | 0.07 | 34.14 (3.95 to 64.32) | 0.03 | 31.50 (-8.54 to 71.54) | 0.12 | 30.77 (1.27 to 60.27) | 0.04 | 28.45 (-16.01 to 72.91) | 0.21 |
Spine aBMD (g/cm2) | ||||||||||||||||||||
Average-acceleration | 0.01 (-0.01 to 0.03) | 0.40 | 0.00 (-0.02 to 0.03) | 0.74 | 0.01 (-0.01 to 0.03) | 0.40 | 0.00 (-0.02 to 0.03) | 0.78 | 0.01 (-0.01 to 0.03) | 0.40 | 0.00 (-0.02 to 0.03) | 0.77 | 0.01 (-0.01 to 0.03) | 0.40 | 0.00 (-0.02 to 0.03) | 0.75 | 0.01 (-0.01 to 0.03) | 0.40 | 0.01 (-0.03 to 0.04) | 0.75 |
Intensity-gradient | 0.01 (-0.01 to 0.03) | 0.17 | 0.01 (-0.01 to 0.03) | 0.24 | 0.01 (-0.01 to 0.04) | 0.19 | 0.01 (-0.01 to 0.03) | 0.24 | 0.01 (-0.01 to 0.03) | 0.27 | 0.01 (-0.01 to 0.04) | 0.39 | 0.01 (-0.01 to 0.03) | 0.36 | 0.01 (-0.02 to 0.04) | 0.58 | 0.01 (-0.01 to 0.03) | 0.40 | 0.01 (-0.03 to 0.04) | 0.70 |
Spine BMC (g) | ||||||||||||||||||||
Average-acceleration | 1.09 (-0.58 to 2.75) | 0.20 | 0.57 (-1.22 to 2.35) | 0.53 | 1.09 (-0.58 to 2.75) | 0.20 | 0.30 (-1.39 to 1.99) | 0.72 | 1.09 (-0.58 to 2.75) | 0.20 | 0.21 (-1.62 to 2.03) | 0.82 | 1.09 (-0.58 to 2.75) | 0.20 | 0.20 (-1.88 to 2.28) | 0.85 | 1.09 (-0.58 to 2.75) | 0.20 | 0.43 (-1.93 to 2.8) | 0.72 |
Intensity-gradient | 1.31 (-0.12 to 2.73) | 0.07 | 1.05 (-0.05 to 2.59) | 0.18 | 1.62 (0.09 to 3.14) | 0.04 | 1.48 (-0.14 to 3.09) | 0.07 | 1.59 (-0.02 to 3.19) | 0.05 | 1.48 (-0.37 to 3.34) | 0.12 | 1.44 (-0.20 to 3.08) | 0.09 | 1.32 (-0.08 to 3.44) | 0.22 | 1.13 (-0.48 to 2.74) | 0.17 | 0.84 (-1.47 to 3.16) | 0.47 |
Total hip aBMD (g/cm2) | ||||||||||||||||||||
Average-acceleration | 0.02 (-0.00 to 0.04) | 0.09 | 0.01 (-0.01 to 0.03) | 0.44 | 0.02 (-0.00 to 0.04) | 0.09 | 0.01 (-0.01 to 0.03) | 0.45 | 0.02 (-0.00 to 0.04) | 0.09 | 0.01 (-0.02 to 0.03) | 0.63 | 0.02 (-0.00 to 0.04) | 0.09 | 0.01 (-0.02 to 0.04) | 0.70 | 0.02 (-0.00 to 0.04) | 0.09 | 0.01 (-0.03 to 0.04) | 0.74 |
Intensity-gradient | 0.02 (0.01 to 0.04) | 0.006 | 0.02 (0.00 to 0.04) | 0.05 | 0.02 (0.00 to 0.04) | 0.02 | 0.02 (-0.00 to 0.04) | 0.08 | 0.03 (0.01 to 0.04) | 0.009 | 0.02 (-0.00 to 0.04) | 0.06 | 0.02 (0.00 to 0.04) | 0.02 | 0.02 (-0.01 to 0.05) | 0.15 | 0.02 (0.00 to 0.04) | 0.04 | 0.02 (-0.01 to 0.05) | 0.25 |
Total hip BMC (g) | ||||||||||||||||||||
Average-acceleration | 0.73 (-0.21 to 1.67) | 0.12 | 0.27 (-0.77 to 1.30) | 0.61 | 0.73 (-0.21 to 1.67) | 0.12 | 0.37 (-0.63 to 1.38) | 0.47 | 0.73 (-0.21 to 1.67) | 0.12 | 0.22 (-0.91 to 1.34) | 0.71 | 0.73 (-0.21 to 1.67) | 0.12 | 0.28 (-1.01 to 1.57) | 0.67 | 0.73 (-0.21 to 1.67) | 0.12 | 0.52 (-0.94 to 1.97) | 0.48 |
Intensity-gradient | 1.06 (0.39 to 1.72) | 0.002 | 0.94 (0.17 to 1.71) | 0.02 | 0.85 (0.11 to 1.59) | 0.03 | 0.68 (-0.12 to 1.47) | 0.09 | 0.98 (0.24 to 1.72) | 0.01 | 0.87 (-0.06 to 1.80) | 0.07 | 0.84 (0.05 to 1.63) | 0.04 | 0.67 (-0.44 to 1.79) | 0.24 | 0.62 (-0.18 to 1.41) | 0.13 | 0.28 (-0.96 to 1.52) | 0.66 |
Femoral neck cross-sectional area (cm2) | ||||||||||||||||||||
Average-acceleration | 0.05 (-0.02 to 0.12) | 0.17 | 0.02 (-0.06 to 0.09) | 0.65 | 0.05 (-0.02 to 0.12) | 0.17 | 0.02 (-0.06 to 0.10) | 0.63 | 0.05 (-0.02 to 0.12) | 0.17 | 0.01 (-0.07 to 0.09) | 0.77 | 0.05 (-0.02 to 0.12) | 0.17 | 0.02 (-0.07 to 0.11) | 0.73 | 0.05 (-0.02 to 0.12) | 0.17 | 0.02 (-0.08 to 0.13) | 0.66 |
Intensity-gradient | 0.07 (0.02 to 0.13) | 0.01 | 0.06 (0.01 to 0.12) | 0.03 | 0.07 (0.01 to 0.13) | 0.03 | 0.06 (-0.00 to 0.12) | 0.07 | 0.07 (0.01 to 0.13) | 0.03 | 0.06 (-0.01 to 0.13) | 0.07 | 0.06 (-0.01 to 0.13) | 0.07 | 0.05 (-0.03 to 0.13) | 0.23 | 0.05 (-0.02 to 0.12) | 0.13 | 0.03 (-0.06 to 0.13) | 0.47 |
Femoral neck section modulus (cm3) | ||||||||||||||||||||
Average-acceleration | 0.03 (-0.01 to 0.08) | 0.14 | 0.03 (-0.02 to 0.07) | 0.30 | 0.03 (-0.01 to 0.08) | 0.14 | 0.03 (-0.02 to 0.08) | 0.22 | 0.03 (-0.01 to 0.08) | 0.14 | 0.02 (-0.03 to 0.08) | 0.37 | 0.03 (-0.01 to 0.08) | 0.14 | 0.03 (-0.03 to 0.09) | 0.31 | 0.03 (-0.01 to 0.08) | 0.14 | 0.02 (-0.04 to 0.09) | 0.52 |
Intensity-gradient | 0.03 (-0.02 to 0.07) | 0.20 | 0.02 (-0.03 to 0.06) | 0.47 | 0.02 (-0.02 to 0.06) | 0.34 | 0.00 (-0.04 to 0.05) | 0.82 | 0.03 (-0.01 to 0.07) | 0.16 | 0.02 (-0.03 to 0.06) | 0.51 | 0.02 (-0.02 to 0.06) | 0.26 | 0.00 (-0.05 to 0.06) | 0.86 | 0.03 (-0.01 to 0.07) | 0.13 | 0.02 (-0.04 to 0.07) | 0.59 |
Values are regression coefficients (ß), their 95% confidence intervals (CI), and
Model 1 includes the activity variable (average-acceleration or intensity-gradient) adjusted for age at wave 9, stature at wave 9, mass at wave 9, years from peak height velocity at wave 9, the proportion of the 24-hour cycle the accelerometer was worn, and the mean age for physical activity measures. Model 2 includes both activity variables in the same model (average-acceleration and intensity-gradient).
Bold emphasis indicates statistical significance at