Table 5.
Multiple linear regression showing the association between mean PM2.5 (μg/m3) from 2006 to 2011 and SOX2 promoter methylation
| Variable | β | P value |
|---|---|---|
| PM2.5 (μg/m3) | 0.00042 | < .0001 |
| Sex (women: reference) | ||
| Men | 0.00144 | 0.4793 |
| Age | 0.00028 | < .0001 |
| Exposure to SHS (no: reference) | ||
| Yes | 0.00142 | 0.3030 |
| Exercise (no: reference) | ||
| Yes | − 0.00145 | 0.1062 |
| Drinking (never: reference) | ||
| Former | − 0.00319 | 0.4290 |
| Current | − 0.00074 | 0.7543 |
| Body fat (%) | − 0.00030 | 0.0513 |
| BMI (kg/m2) | 0.00047 | 0.0854 |
| Waist-hip ratio | − 0.00411 | 0.6063 |
| Asthma | − 0.00153 | 0.4076 |
| Emphysema | − 0.00073 | 0.7800 |