Table 3.
Ordinal logistic regression model for association between SRH, number of nearby coal facilities, and covariates.
| Covariate | OR | 95% Wald confidence limits | p value | |
|---|---|---|---|---|
| Age | 0.98 | 0.97 | 0.99 | <0.01∗∗ |
| BMI | 0.91 | 0.88 | 0.94 | <0.01∗∗ |
| Sex | 0.20 | |||
| Female | 1.00 | |||
| Male | 1.29 | 0.87 | 1.92 | |
| Smoking status | <0.01∗∗ | |||
| Not at all | 1.00 | |||
| Some days | 0.96 | 0.45 | 2.03 | |
| Every day | 0.37 | 0.21 | 0.64 | |
| Income level | <0.01∗∗ | |||
| Under $25,000 | 1.00 | |||
| $25,000 up to $49,999 | 1.23 | 0.70 | 2.14 | |
| $50,000 up to $74,999 | 2.73 | 1.52 | 4.90 | |
| $75,000 or more | 2.19 | 1.26 | 3.81 | |
| Education level | <0.01∗∗ | |||
| High school or less | 1.00 | |||
| Some college/associates | 1.11 | 0.69 | 1.78 | |
| Bachelors or more | 2.52 | 1.51 | 4.21 | |
| Number of coal facilities nearby | 0.31 | |||
| 0 | 1.00 | |||
| 1 or 2 | 0.91 | 0.53 | 1.55 | |
| 3 or 4 | 0.74 | 0.43 | 1.28 | |
| 5 or 6 | 0.60 | 0.34 | 1.06 | |
∗∗Statistically significant at p < 0.01.