Table 2 Mean, standard deviation and p-value of backpack and total load by school-grade in absolute values and after normalizing for body weight
Backpack | Total load | |||
|---|---|---|---|---|
load (kg) | load·BW−1 | load (kg) | load·BW−1 | |
Load (mean) | ||||
5th year | 4.99 (1.42) | 0.130 (0.044) | 5.40 (1.54) | 0.140 (0.048) |
9th year | 4.06 (1.21) | 0.078 (0.027) | 4.41 (1.44) | 0.085 (0.032) |
p | < 0.001 | < 0.001 | < 0.001 | < 0.001 |
Max subject’s load (mean) | ||||
5th year | 6.25 (1.30) | 0.160 (0.047) | 6.83 (1.30) | 0.177 (0.052) |
9th year | 5.13 (1.13) | 0.098 (0.029) | 5.69 (1.36) | 0.111 (0.034) |
p | < 0.001 | < 0.001 | < 0.001 | < 0.001 |