Table 3.
Logistic regression analysis assessing risk factors associated with FEV1/FVC <70%.a
| Factors | Odds ratio | 95% CIb | P value |
|---|---|---|---|
| Age, years | |||
| <60 | Reference | ||
| ≥60 | 3.20 | 1.82–5.63 | 0.000 |
| Body mass index, kg/m2 | |||
| <25 | Reference | ||
| ≥25 | 0.27 | 0.13–0.59 | 0.001 |
| HbA1c, % | |||
| <5.6% | Reference | ||
| ≥5.6% | 2.04 | 1.23–3.40 | 0.006 |
| Smoking status | |||
| Never | Reference (or 1.00) | ||
| Former | 1.98 | 1.07–3.67 | 0.031 |
| Current | 3.24 | 1.71–6.15 | <0.001 |
CI, confidence interval; FVC, forced vital capacity; FEV1, forced expiratory volume in 1 s; HbA1c, glycated hemoglobin.
a
FEV1/FVC, ratio of FEV1:FVC.
b
Logistic regression was used for analysis; Hosmer–Lemeshow test, p = 0.498.