Table 3.
ORs for the determinants of reduced self-reported walking time
| Determinant | OR for self-reported walking time <30 min/day (95% CI) | P-value |
|---|---|---|
| mMRC dyspnea score | ||
| 0–1 | 1.00 | |
| 2 | 1.86 (1.57–2.20) | <0.001 |
| 3 | 3.57 (2.92–4.37) | <0.001 |
| 4 | 16.35 (11.07–24.13) | <0.001 |
| FEV1 levels | ||
| ≧80% predicted | 1.00 | |
| ≧50% and <80% predicted | 0.74 (0.53–1.03) | 0.080 |
| ≧30% and <50% predicted | 1.11 (0.80–1.54) | 0.522 |
| <30% predicted | 1.64 (1.15–2.34) | 0.006 |
| COPD admissions¶ | ||
| 0 | 1.00 | |
| 1 | 1.41 (1.17–1.70) | <0.001 |
| 2 | 2.47 (1.99–3.06) | <0.001 |
| >2 | 3.16 (2.53–3.95) | <0.001 |
| CAT | ||
| <10 | 1.00 | |
| 10–20 | 1.63 (1.14–2.34) | 0.008 |
| 20–30 | 2.85 (2.01–4.03) | <0.001 |
| >30 | 5.25 (3.52–7.84) | <0.001 |
| GOLD groups | ||
| A | 1.00 | |
| B | 2.57 (1.20–5.47) | 0.015 |
| C | 1.55 (0.63–3.85) | 0.344 |
| D | 4.17 (2.03–8.56) | <0.001 |
| BODEx index | ||
| 0–1 | 1.00 | |
| 2 | 1.52 (1.19–1.93) | 0.001 |
| 3–4 | 2.10 (1.70–2.60) | <0.001 |
| >4 | 5.08 (4.06–6.37) | <0.001 |
| Charlson index | ||
| 1 | 1.00 | |
| 2 | 1.15 (0.96–1.37) | 0.131 |
| 3 | 1.47 (1.21–1.80) | <0.001 |
| ≧4 | 2.53 (2.01–3.18) | <0.001 |
Note:
¶
Number of events in the previous 12 months.
Abbreviations: 95% CI, 95% confidence interval; BODEx, body mass index, airway obstruction, dyspnea, exacerbation; CAT, COPD assessment test; COPD, chronic obstructive pulmonary disease; FEV1, forced expiratory volume in the first second; GOLD, Global Initiative for Chronic Obstructive Lung Disease; mMRC, modified Medical Research Council dyspnea scale; OR, odds ratio.