Table 2 Characteristics of low back pain
Low back pain | Total n = 1215 | Age group by years | |||
|---|---|---|---|---|---|
≤ 10 n = 195 | 11–12 n = 290 | 13–14 n = 320 | 15–16 n = 410 | ||
Previous episodes, n (%) | 305 (25.1) | 7 (3.6) | 39 (13.5) | 84 (26.3) | 175 (42.7) |
Seasonal pain with required rest, n (%) | |||||
Total | 255 (21.0) | 6 (3.1) | 37 (12.8) | 71 (22.2) | 142 (34.6) |
Grade 1 (< 1 week of rest) | 192 (15.8) | 5 (2.6) | 33 (11.4) | 49 (15.3) | 105 (25.6) |
Grade 2 (1–4 weeks of rest) | 46 (3.8) | 1 (0.5) | 3 (1.0) | 18 (5.6) | 24 (5.9) |
Grade 3 (≥ 4 weeks of rest) | 17 (1.4) | 0 (0.0) | 1 (0.3) | 4 (1.3) | 12 (2.9) |
Low back pain on day of checkup, n (%) | 146 (12.0) | 10 (5.1) | 18 (6.2) | 41 (12.8) | 77 (18.8) |
Pain at lumbar flexion | 38 (3.1) | 4 (2.1) | 3 (1.0) | 11 (3.4) | 20 (4.9) |
Pain at lumbar extension | 136 (11.2) | 8 (4.1) | 17 (5.9) | 36 (11.3) | 75 (18.3) |