Table 1. Baseline characteristics, compared between the participants with lumbar spinal stenosis who did and did not complete the 3-year follow-up.
| Participants | Drop-outs | P-value | |
|---|---|---|---|
| (n = 185) | (n = 89) | ||
| Age (years), mean (SD) | 70.7 (7.4) | 71.7 (7.6) | 0.28 |
| BMI (kg/m2), mean (SD) | 23.4 (3.1) | 23.2 (3.1) | 0.53 |
| Gender (%) | |||
| Female | 77 (41.6) | 46 (51.7) | 0.12 |
| Educational background | |||
| At least a high school graduate | 134 (72.4) | 64 (71.9) | 0.93 |
| Cauda equina symptoms | 78 (42.2) | 44 (49.4) | 0.26 |
| Degenerative spondylolisthesis/scoliosis | 99 (53.5) | 47 (47.5) | 0.91 |
| Duration of illness (months) | |||
| <12 | 48 (26.0) | 23 (25.8) | 0.99 |
| 12–59 | 80 (43.2) | 38 (42.7) | |
| ≥60 | 57 (30.8) | 28 (31.5) | |
| Hypertension | 120 (64.9) | 57 (64.0) | 0.89 |
| GDS score (tertiles) | |||
| 0–2 | 73 (39.5) | 27 (30.3) | 0.13 |
| 3–6 | 64 (34.6) | 29 (32.6) | |
| ≥7 | 48 (25.9) | 33 (37.1) |
BMI, body mass index; SD, standard deviation; GDS, Geriatric Depression Scale
The values are reported as n (%), unless indicated.