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Characteristics of children participating in the survey (n=204)
| Median age (years; range) | 13 (11–16) |
|---|---|
| Male (%) | 46 |
| Play regular sports (%) | 40 |
| Walk >30 min to school each way (%) | 58 |
| Dwelling region | |
| Center (%) | 50 |
| Caniço (%) | 20 |
| Periphery (%) | 30 |
| Ever had any back pain (%) | 58 |
| History of low back pain | |
| Had several episodes (%) | |
| In lifetime (%) | 28 |
| In previous year (%) | 13.5 |
| In previous month (%) | 12 |
| History of radiating pain (%) | 8 |
| Saw MD or folk healer (%) | 4 |
