Table 4. Bivariate analysis of the prevalence of low back pain according to gender, age, ethnic group and BMI of adolescents from public schools in Santa Maria, RS, Brazil, 2012 (n=343).
| n | Low back pain prevalence | OR (95%CI) | p-value | |
|---|---|---|---|---|
| Gender | ||||
| Female | 125 | 60% | 1.13 (0.93-1.37) | 0.21 |
| Male | 70 | 53% | 1.00 | |
| Age | ||||
| 12 years | 59 | 51% | 1.00 | |
| 13 years | 66 | 55% | 1.09 (0.86-1.39) | 0.48 |
| 14 years | 44 | 67% | 1.31 (1.02-1.68) | 0.039 |
| 15 years | 20 | 63% | 1.23 (0.89-1.70) | 0.24 |
| Ethnic Group | ||||
| Caucasian | 93 | 43% | 0.96 (0.83-1.21) | 0.99 |
| Other | 97 | 43% | 1.00 | |
| BMI | ||||
| Excessive lean | 15 | 39% | 0.66 (0.43-0.99) | 0.01 |
| Normal | 138 | 59% | 1.00 | |
| Over weight or obese | 34 | 67% | 1.14 (0.91-1.42) | 0.29 |
OR: odds ratio; CI: confidence interval; p-value <0.05.