Table 3.
Univariate Analysis Between Overlapped and Non-overlapped Groups
| Variables | Overlap (+) (n = 267) | Overlap (-) (n = 492) | P-value |
|---|---|---|---|
| Male | 81 (30.3%) | 164 (33.3%) | 0.417 |
| Smoking | 23 (8.6%) | 49 (10.0%) | 0.546 |
| Drinking | 101 (37.8%) | 211 (42.9%) | 0.176 |
| Hypertension | 63 (23.6%) | 104 (21.1%) | 0.435 |
| DM | 37 (13.9%) | 62 (12.6%) | 0.624 |
| HNP | 9 (3.4%) | 5 (1.0%) | 0.021 |
| CVA history | 3 (1.1%) | 5 (1.0%) | 0.890 |
| Presence of pulmonary disease | 8 (3.0%) | 4 (0.8%) | 0.021 |
| Inadequate fiber intake | 65 (24.3%) | 84 (17.1%) | 0.016 |
| Ingestion of laxatives | 171 (64.0%) | 243 (49.4%) | < 0.001 |
| Age (mean ± SD, years) | 54.6 ± 17.2 | 51.1 ± 18.2 | 0.009 |
| BMI (mean ± SD, kg/m2) | 22.6 ± 3.1 | 22.4 ± 2.9 | 0.428 |
DM, diabetes mellitus; HNP, herniated nucleus pulposus; CVA, Cerebrovascular accident; BMI, body mass index.