Table 3 Baseline data and annual changes evaluating the effect of school transportation mode for boys, anthropometrics, bone mineral content (BMC) and bone width are included, data are presented as mean (SD).
Boys (N = 81) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
Base line | Annual changes (unadjusted) | Annual changes (adjusted) | |||||||
Walking or cycling | Car or bus | p - value | Walking or cycling | Car or bus | p - value | Walking or cycling | Car or bus | p - value | |
Numbers | N = 57 | N = 24 | N = 57 | N = 24 | N = 57 | N = 24 | |||
Age (yrs) | 8.0 (0.5) | 7.8 (0.7) | 0.21 | --- | --- | --- | |||
Weight (kg) | 28.8 (5.4) | 27.0 (4.8) | 0.15 | 3.6 (1.2) | 2.8 (1.2) | 0.01 | |||
Height (cm) | 131.1 (7.0) | 128.3 (7.3) | 0.10 | 5.8 (0.7) | 5.4 (0.7) | 0.02 | |||
Lean mass (kg) | 22.5 (3.0) | 20.9 (2.8) | 0.03 | 2.3 (0.4) | 2.0 (0.4) | <0.01 | 2.3 (0.4) | 2.1 (0.4) | 0.10 |
Fat mass (kg) | 4.0 (3.0) | 3.7 (2.8) | 0.61 | 1.3 (1.1) | 0.8 (0.9) | 0.07 | 1.3 (1.0) | 0.9 (1.0) | 0.22 |
BMC (g) | |||||||||
L2-L4 | 16.5 (3.0) | 14.7 (3.6) | 0.02 | 2.1 (0.8) | 1.8 (0.6) | 0.12 | 2.1 (0.6) | 1.9 (0.6) | 0.18 |
Third lumbar vertebra | 5.7 (1.0) | 4.9 (1.1) | <0.01 | 0.59 (0.4) | 0.67 (0.3) | 0.40 | 0.65 (0.3) | 0.65 (0.3) | 0.97 |
Femoral neck | 3.0 (0.7) | 2.6 (0.6) | 0.01 | 0.34 (0.3) | 0.42 (0.3) | 0.29 | 0.35 (0.3) | 0.40 (0.3) | 0.41 |
Ward | 1.4 (0.6) | 1.1 (0.3) | 0.06 | 0.19 (0.2) | 0.24 (0.3) | 0.36 | 0.18 (0.2) | 0.26 (0.3) | 0.19 |
Trochanter | 2.8 (1.5) | 2.7 (1.2) | 0.63 | 0.47 (0.4) | 0.45 (0.3) | 0.80 | 0.45 (0.4) | 0.48 (0.4) | 0.78 |
Bone Width (cm) | |||||||||
Third lumbar vertebra | 3.10 (0.23) | 2.99 (0.27) | 0.05 | 0.08 (0.09) | 0.10 (0.07) | 0.42 | 0.10 (0.07) | 0.09 (0.07) | 0.40 |
Femoral neck | 2.51 (0.20) | 2.43 (0.10) | 0.62 | 0.09 (0.08) | 0.10 (0.06) | 0.62 | 0.09 (0.07) | 0.11 (0.07) | 0.19 |