Table 3.
Subgroup analysis of the correlation between Log2HbEtO levels and CB.
| Characteristics | CB [β (95%CI)] | P-value | P for interaction |
|---|---|---|---|
| Age | 0.568 | ||
| ≤ 60 years | 1.20 (1.08, 1.33) | < 0.001 | |
| >60 years | 1.25 (1.11, 1.41) | < 0.001 | |
| Gender | 0.262 | ||
| Female | 1.26 (1.14, 1.40) | < 0.001 | |
| Male | 1.17 (1.04, 1.31) | 0.008 | |
| Race/ethnicity | 0.274 | ||
| Mexican American | 0.79 (0.52, 1.21) | 0.280 | |
| Other Hispanic | 1.15 (0.79, 1.68) | 0.459 | |
| Non-Hispanic White | 1.26 (1.13, 1.40) | < 0.001 | |
| Non-Hispanic Black | 1.22 (1.00, 1.49) | 0.050 | |
| Other race | 1.32 (0.98, 1.79) | 0.069 | |
| PIRs | 0.135 | ||
| < 1.3 | 1.31 (1.14, 1.49) | < 0.001 | |
| 1.3–3.5 | 1.23 (1.10, 1.39) | < 0.001 | |
| >3.5 | 1.01 (0.80, 1.26) | 0.955 | |
| BMI (kg/m2) | 0.503 | ||
| < 25 | 1.25 (1.05, 1.48) | 0.013 | |
| 25–30 | 1.29 (1.12, 1.49) | < 0.001 | |
| > 30 | 1.16 (1.04, 1.30) | 0.010 | |
| Smoking status | 0.400 | ||
| Yes | 1.20 (1.10, 1.30) | < 0.001 | |
| No | 1.33 (1.05, 1.69) | 0.017 | |
| Alcohol consumption | 0.778 | ||
| < 4 drinks/day | 1.21 (1.10, 1.33) | < 0.001 | |
| ≥4 drinks/day | 1.24 (1.07, 1.45) | 0.006 | |
| Diabetes | 0.313 | ||
| Yes | 1.33 (1.12, 1.57) | 0.001 | |
| No | 1.20 (1.09, 1.32) | < 0.001 | |
| Hypertension | 0.364 | ||
| Yes | 1.26 (1.13, 1.41) | < 0.001 | |
| No | 1.17 (1.05, 1.31) | 0.006 | |
| Sedentary time, h | 0.838 | ||
| < 3 h | 1.25 (1.03, 1.52) | 0.026 | |
| 3–6 h | 1.18 (1.04, 1.35) | 0.013 | |
| >6 h | 1.24 (1.11, 1.40) | < 0.001 |
PIRs, poverty-to-income ratios; Log2HbEtO, Natural Log2-transformed hemoglobin adducts of ethylene oxide; BMI, body mass index; CB, chronic bronchitis.