Table 3 LBP in a Danish general population at ages 40/41 (survey 1) and at 44/45 (survey 2)
Number of days with LBP in the preceding year at survey 1 (N = 412) | Number of days with LBP in the preceding year at survey 2 in relation to survey 1 (N = 348 participants +64 non-responders) % [95% CI] | |||
|---|---|---|---|---|
0 | 1-30 | >30 | Non-responders | |
(n = 112) | (n = 146) | (n = 90) | (n = 64) | |
0 (n = 123) | 44 [35–53] | 38 [29–47] | 7 [2–12] | 11 [5–17] |
1-30 (n = 187) | 24 [18–30] | 44 [37–51] | 16 [11–21] | 16 [11–21] |
>30 (n = 102) | 14 [7–21] | 16 [9–23] | 50 [40–60] | 21 [13–29] |