Table 2. Demographic and clinical data of chronic low back pain patients (N=375) according to sleeping position.
LBP: low back pain; SD: standard deviation; VAS: visual analog scale.
| Patient data | Sleeping position | P-value | |||
| Side (n=213) | Supine (n=114) | Prone (n=48) | |||
| Demographic data | Female, n (%) | 130 (61%) | 83 (73%) | 27 (56%) | 0.69 |
| Male, n (%) | 83 (39%) | 31 (27%) | 21 (44%) | ||
| Age in years, mean ± SD | 54 ± 17 | 50 ± 16 | 42 ± 15 | <0.001 | |
| BMI (kg/m2), mean ± SD | 28.4 ± 5.9 | 27.2 ± 6.0 | 28.8 ± 9.0 | 0.70 | |
| Clinical data | LBP (VAS), mean ± SD | 63 ± 24 | 62 ± 24 | 60 ± 24 | 0.36 |
| Leg pain (VAS), mean ± SD | 61 ± 28 | 52 ± 28 | 50 ± 30 | 0.007 | |
| Oswestry, mean ± SD | 41 ± 17 | 36 ± 17 | 33 ± 18 | <0.001 | |
| Aggravates LBP | Standing, n (%) | 151 (71%) | 74 (65%) | 24 (50%) | 0.007 |
| Walking, n (%) | 124 (58%) | 61 (54%) | 22 (46%) | 0.11 | |
| Sitting, n (%) | 142 (67%) | 72 (63%) | 36 (75%) | 0.54 | |
| Working, n (%) | 114 (54%) | 67 (59%) | 30 (63%) | 0.19 | |
| Leisure, n (%) | 49 (23%) | 24 (21%) | 12 (25%) | 0.94 | |
| Lying, n (%) | 49 (23%) | 17 (15%) | 12 (25%) | 0.63 | |
| LBP occurs | Sleeping, n (%) | 164 (77%) | 87 (76%) | 38 (79%) | 0.84 |
| Getting up, n (%) | 187 (88%) | 99 (87%) | 41 (85%) | 0.64 | |