Table 1 Point prevalence of low back pain and extracurricular sports activities among boys by grade
Variable | E4 | E5 | E6 | J1 | J2 | J3 |
|---|---|---|---|---|---|---|
ECSA (−) | ||||||
n (%) | 607 (28.0) | 701 (27.0) | 883 (34.3) | 377 (13.6) | 439 (16.5) | 2186 (83.9) |
LBP (+) /LBP (−) | 15/592 | 23/678 | 42/841 | 22/355 | 35/404 | 180/2006 |
LBP (+) /n (%) | 2.5 | 3.3 | 4.8 | 5.8 | 8.0 | 8.2 |
ECSA (+) | ||||||
n (%) | 1564 (72.0) | 1891 (73.0) | 1684 (65.6) | 2394 (86.4) | 2220 (83.5) | 421 (16.1) |
LBP (+) /LBP (−) | 44/1520 | 63/1828 | 98/1586 | 171/2223 | 215/2005 | 64/357 |
LBP (+) /n (%) | 2.8 | 3.3 | 5.8 | 7.1 | 9.7 | 15.2 |
Odds ratio | 1.14 | 1.02 | 1.24 | 1.24 | 1.24 | 2.00 |
(95% CI) | (0.63–2.07) | (0.63–1.65) | (0.85–1.79) | (0.79–1.96) | (0.85–1.80) | (1.47–2.71)** |
PAF (%) | 9.1* | 1.1 | 12.8 | 16.2 | 15.2 | 12.0 |