Table 2 Proportion of episodes according to length of episodes of upper and lower extremity pain, from a cohort of Danish school-children
Length of episodes | Study year 1 (44 weeks) | Study year 2 (47 weeks) | Study year 3 (46 weeks) | ||||
|---|---|---|---|---|---|---|---|
Upper extremity | n | % (95% CI) | N | % (95% CI) | N | % (95% CI) | |
1 week | 197 | 60.6 (55.1–65.9) | 283 | 66.3 (61.6–70.6) | 180 | 50.9 (45.5–56.2) | |
2–3 weeks | 86 | 26.5 (21.7–31.6) | 86 | 20.1 (16.4–24.3) | 107 | 30.2 (25.5–35.3) | |
4–11 weeks | 40 | 12.3 (8.9–16.4) | 55 | 12.9 (9.9–16.4) | 55 | 15.5 (11.9–19.7) | |
≥ 12 weeks | 2 | 0.6 (0.1–2.2) | 3 | 0.7 (0.1–2.0) | 12 | 3.4 (1.8–5.8) | |
Totala | 325 | 100.0 | 427 | 100.00 | 354 | 100.0 | |
Median | |||||||
(25%–75%) | 1 (1–2) | 1 (1–2) | 1 (1–3) | ||||
Mean (95% CI) | 2.0 (1.8–2.2) | 2.1 (1.9–2.3) | 2.8 (2.4–3.1) | ||||
Lower extremity | 1 week | 814 | 51.3 (48.8–53.8) | 816 | 50.9 (48.4–53.4) | 615 | 48.0 (45.3–50.8) |
2–3 weeks | 403 | 25.4 (23.3–27.6) | 407 | 25.4 (23.3–27.6) | 337 | 26.3 (23.9–28.8) | |
4–11 weeks | 316 | 19.9 (18.0–22.0) | 297 | 18.5 (16.7–20.5) | 247 | 19.3 (17.2–21.6) | |
≥ 12 weeks | 54 | 3.4 (2.6–4.4) | 83 | 5.2 (4.1–6.4) | 81 | 6.3 (5.1–7.8) | |
Totala | 1587 | 100.0 | 1603 | 100.0 | 1220 | 100.0 | |
Median | |||||||
(25%–75%) | 1 (1–3) | 1 (1–3) | 2 (1–4) | ||||
Mean (95% CI) | 3.0 (2.8–3.2) | 3.3 (3.1–3.5) | 3.6(3.4–3.9) | ||||