Table 3.
Multivariate Logistic Regression Analysis of COPD Development During Follow-Up
| Odds Ratio | 95% Confidence Interval | p-value | |
|---|---|---|---|
| Income, quartile | |||
| 1st quartile | 1.044 | 0.507–2.150 | 0.908 |
| 2nd quartile | 0.901 | 0.457–1.776 | 0.763 |
| 3rd quartile | 0.988 | 0.512–1.907 | 0.971 |
| 4th quartile | Reference | ||
| Education level | |||
| Elementary school | 1.879 | 1.124–3.141 | 0.016 |
| Middle school | 1.143 | 0.702–1.862 | 0.591 |
| High school | 1.469 | 0.883–2.442 | 0.138 |
| College | Reference |
Note: The data are adjusted by age, sex, body mass index, smoking (pack-year), white blood cell count, occupation, and residence.
Abbreviation: COPD, chronic obstructive pulmonary disorder.