Table 3.
Proportion of children who experienced lower extremity pain by number of pain weeks reported for each study year, from a cohort of Danish school children
| Number of pain weeks |
Study year 1 (44 weeks) | Study year 2 (47 weeks) | Study year 3 (46 weeks) | |||
|---|---|---|---|---|---|---|
| n | % (95% CI) | n | % (95% CI) | n | % (95% CI) | |
| 1 | 118 | 20.0 (16.8–23.5) | 140 | 21.8 (18.2–25.2) | 120 | 21.9 (18.5–25.6) |
| 2 | 83 | 14.1 (11.4–17.1) | 77 | 12.0 (9.6–14.8) | 77 | 14.0 (11.2–17.2) |
| 3 | 57 | 9.7 (7.4–12.3) | 74 | 11.5 (9.2–14.3) | 48 | 8.7 (6.5–11.4) |
| 4 | 40 | 6.8 (4.9–9.1) | 58 | 9.1 (6.9–11.5) | 41 | 7.5 (5.4–10.0) |
| 5 | 38 | 6.4 (4.6–8.7) | 28 | 4.4 (2.9–6.3) | 29 | 5.3 (3.6–7.5) |
| 6 | 25 | 4.2 (2.8–6.2) | 20 | 3.1 (1.9–4.8) | 29 | 5.3 (3.6–7.5) |
| 7 | 30 | 5.1 (3.5–7.2) | 27 | 4.2 (2.8–6.1) | 17 | 3.1 (1.81–4.9) |
| 8 | 16 | 2.7 (1.6–4.4) | 22 | 3.4 (2.2–5.2) | 21 | 3.8 (2.4–5.8) |
| 9 | 17 | 2.9 (1.7–4.6) | 19 | 3.0 (1.8–4.6) | 16 | 2.9 (1.7–4.7) |
| 10 | 14 | 2.4 (1.3–3.9) | 13 | 2.0 (1.1–3.4) | 15 | 2.7 (1.5–4.5) |
| 11 | 17 | 2.9 (1.7–4.6) | 12 | 1.9 (1.0–3.2) | 9 | 1.6 (0.8–3.1) |
| 12 | 12 | 2.0(1.1–3.5) | 14 | 2.2 (1.2–3.6) | 9 | 1.6 (0.8–3.1) |
| 13–45 | 123 | 20.9 (17.6–24.4) | 137 | 21.4 (18.3–24.8) | 118 | 21.5 (18.1–25.2) |
| Totala | 590 | 100.0 | 641 | 100.0 | 549 | 100.00 |
| Median | ||||||
| (25%–75%)b | 4(2-11) | 4 (2–11) | 4 (2–10) | |||
| Mean (95% CI)b | 8.3 (7.5–9.1) | 8.3 (7.5–9.1) | 8.7 (7.8–9.6) | |||
children without reported pain are not included
CI Confidence intervals
anumber of participants reporting lower extremity pain during 1 study year
bnumber of weeks