Table 5. Association between the perception of heaviness in carrying of schoolbags and NLBP.
| Crude OR | 95%CI | p value | ||
|---|---|---|---|---|
| All | 1.44 | 1.330–1.55 | <0.001 | |
| Sex | ||||
| Girls | 1.36 | 1.23–1.51 | <0.001 | |
| Boys | 1.27 | 1.13–1.43 | <0.001 | |
| Age | ||||
| 10–11 years | 1.35 | 0.96–1.89 | 0.081 | |
| 12–13 years | 1.58 | 1.26–1.98 | <0.001 | |
| 14–15 years | 1.21 | 1.05–1.40 | <0.01 | |
| 16–17 years | 1.30 | 1.16–1.47 | <0.001 | |
| 18–19 years | 1.45 | 1.23–1.72 | <0.001 |
Notes.
- NLBP
- non-specific low back pain
- OR
- odds ratio
- CI
- confidence intervals
The association between the perception of heaviness in carrying of schoolbags (no = 0, yes = 1) and NLBP (no = 0, yes = 1) was analysed by univariate logistic regression with the calculation of the corresponding OR and 95% CI. Statistical significance was set at p < 0.05.