Table 9.
Predictive factors of the occurrence of LSS-positive during the one-year follow-up period
| Category 1 | Category 2 | OR | 95%CI | p-value |
|---|---|---|---|---|
| Gender | Female | 1.051 | 0.755–1.463 | 0.7674 |
| Age (years) | 40–49 | Reference | ||
| 50–59 | 2.249 | 0.821–6.159 | 0.1150 | |
| 60–69 | 1.486 | 0.569–3.883 | 0.4189 | |
| 70–79 | 1.716 | 0.657–4.483 | 0.2702 | |
| ≥80 | 1.928 | 0.671–5.537 | 0.2226 | |
| BMI (kg/m2) | <18.5 | Reference | ||
| 18.5–25.0 | 1,561 | 0.662–3.682 | 0.3090 | |
| 25.1–30.0 | 1.865 | 0.585–5.942 | 0.2919 | |
| ≥30.1 | 2.087 | 0.334–13.036 | 0.4314 | |
| LSS in 2004 | Positive | 3.808 | 2.664–5.444 | <0.0001 |
| RDQ score | 1.049 | 1.013–1.086 | 0.0065 | |
| Knee OA | Positive | 1.385 | 0.995–1.928 | 0.0536 |
| Hip OA | Positive | 1.106 | 0.558–2.191 | 0.7738 |
| Comorbidities | Respiratory | 0.079 | 0.190–6.118 | 0.9315 |
| Diabetes mellitus | 1.833 | 0.930–3.611 | 0.0800 | |
| Cardiovascular | 0.781 | 0.477–1.278 | 0.3250 | |
| Cerebrovascular | 0.742 | 0.256–2.147 | 0.5815 | |
| Hypertension | 1.322 | 0.964–1.812 | 0.0829 | |
| Smoking | Pack-year | 1.000 | 0.908–1.102 | 0.9970 |
| Depressive Symptoms | Severe | Reference | ||
| Moderate | 1.370 | 0.672–2.792 | 0.3856 | |
| Mild | 1.613 | 0.840–3.099 | 0.1510 | |
| None | 1.492 | 0.081–2.527 | 0.1365 |
Notes: LSS-positive status and RDQ score in the initial analysis appeared to be predictive factors of the occurrence and/or presence of LSS-positive during the one-year follow-up period.
Abbreviations: LSS, lumbar spinal stenosis; BMI, body mass index; RDQ, Roland–Morris Disability Questionnaire; OA, osteoarthritis.