Table 3.
Comparisons of the adolescents with recurrent non-specific low back pain and those without on relative school bag weight, BMI and CSR scores
| Variable | Outcome measure | LBP | No LBP | Statistic | p value |
|---|---|---|---|---|---|
| BMI (kg/m2) | Mean (SD)a | 24.8 (2.88) | 25.2 (3.07) | t(62) = 1.65 | 0.10 |
| School bag weight/kg | Mean (SD) | 5.27 (0.92) | 4.78 (0.89) | t(62) = −2.16 | 0.03 |
| Relative school bag weight (%) | Mean (SD) | 8.51 (2.08) | 7.78 (1.69) | t(62) = −1.55 | 0.13 |
| School bag weight (%) | <10 % bBW (light) | 23 (71.9) | 29 (90.6) | 0.11* | |
| ≥10 % BW (heavy) | 9 (29.1) | 3 (9.40 | |||
| Relative school bag weight | Mean (SD) | 8.51 (2.08) | 7.77 (1.69) | t(62) = −1.55 | 0.13 |
| CSR scores (cm) | <0 (inflexible) | 22 (68.8) | 11 (34.4) | Χ2 (1) = 7.6 | 0.006 |
| ≥0 (flexible) | 10 (31.2) | 21 (65.6) | |||
| CSR scores (cm) | Mean (SD) | −1.91 (3.47) | 0.56 (2.69) | t(62) = 3.18 | 0.002 |
*Fishers exact test, aStandard deviation, bBody weight