Frequency of low back pain at the third time point | ||||||
---|---|---|---|---|---|---|
Total | Absence | 1 | 2 | 3 | P for trend | |
Participants without sleep disturbance at the third time point | 1,385 | 868 | 276 | 166 | 75 | |
Onset of sleep disturbance at the fourth time point, n (%) | 171 (12.3) | 86 (9.9) | 41 (14.9) | 29 (17.5) | 15 (20.0) | |
Crude OR (95%CI) | 1 (Ref.) | 1.59 (1.06–2.37) | 1.93 (1.22–3.04) | 2.27 (1.24–4.18) | 0.003 | |
Adjusted OR (95%CI) | 1 (Ref.) | 1.60 (1.05–2.44) | 1.96 (1.20–3.21) | 2.17 (1.14–4.14) | 0.007 |