From: The weight of pupils’ schoolbags in early school age and its influence on body posture
Sex (F/M) | Weight of school bags (kg) | Estimated weight of school bags (kg) | Percentage of predicted value (%) | Excess weight of school bags (kg) | Shoulder straps length difference (cm) | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|
X ± SD (Range) | Me | X ± SD (Range) | Me | X ± SD (Range) | Me | X ± SD (Range) | Me | X ± SD (Range) | Me | ||
Female (68) | 5.9 ± 0.5 (4.7–7.8) | 5.9 | 3.8 ± 0. 4 (3.1–5.9) | 3.7 | 157.0 ± 20.1 (94.1–253.6) | 155.1 | 2.1 ± 0.7 (0.1–4.7) | 2.04 | 2.8 ± 2.1 (0–9) | 2.1 | |
Male (87) | 6.7 ± 0.9 (4.7–9.0) | 6.8 | 4.06 ± 0.5 (3.2–5.9) | 4.2 | 166.0 ± 24.8 (100.7–210.1) | 167.2 | 2.6 ± 0.9 (0.1–4.6) | 2.7 | 2.3 ± 1.8 (0–9) | 3.0 | |
P - values Post-hoc | 0.0001 | 0.0001 | 0.01 | 0.0001 | 0.0001 | ||||||
{1/2} {2/1} | 0.0001 0.0001 | 0.0001 0.0001 | 0.01 0.01 | 0.0001 0.0001 | 0.0001 0.0001 |