Table 3.
The results of multiple linear regression analysis for the effects of beverage intake and smoking status on FEV1/FVC.
| Variables | Crude β (95% CI 2) |
Fully Adjusted β 1
(95% CI 2) |
|---|---|---|
| Soda Intake Frequency | ||
| Per 10 times increasing of monthly intake | 0.0011 (0.0006, 0.0016) | −0.0008 (−0.0012, −0.0003) |
| Never | Ref. | Ref. |
| ≤4 times/week | 0.0070 (0.0036, 0.0103) | 0.0013 (−0.0017, 0.0043) |
| 4–7 times/week | 0.0147 (0.0092, 0.0201) | −0.0016 (−0.0065, 0.0033) |
| >7 times/week | 0.0101 (0.0062, 0.0141) | −0.0052 (−0.0092, −0.0013) |
| p for trend | <0.001 | 0.016 |
| Coffee Intake Frequency | ||
| Per 10 times increasing of monthly intake | −0.0006 (−0.0011, −0.0002) | −0.0006 (−0.0010, −0.0001) |
| Never | Ref. | Ref. |
| ≤4 times/week | 0.0013 (−0.0025, 0.0051) | 0.0021 (−0.0013, 0.0056) |
| 4–7 times/week | −0.0045 (−0.0087, −0.0002) | −0.0013 (−0.0052, 0.0027) |
| >7 times/week | −0.0045 (−0.0082, −0.0007) | −0.0042 (−0.0079, −0.0005) |
| p for trend | 0.003 | 0.031 |
| Green Tea Intake Frequency | ||
| Per 10 times increasing of monthly intake | 0.0022 (0.0013, 0.0031) | 0.0009 (0.0007, 0.0017) |
| Never | Ref. | Ref. |
| ≤4 times/week | 0.0086 (0.0057, 0.0115) | −0.0003 (−0.0029, 0.0023) |
| 4–7 times/week | 0.0131 (0.0073, 0.0189) | 0.0047 (−0.0006, 0.0010) |
| >7 times/week | 0.0146 (0.0075, 0.0217) | 0.0075 (0.0006, 0.0143) |
| p for trend | <0.001 | 0.029 |
| Smoking Status | ||
| Never | Ref. | Ref. |
| Past-smoker | −0.0356 (−0.0391, −0.0320) | −0.0126 (−0.0170, −0.0082) |
| Current-smoker | −0.0373 (−0.0417, −0.0330) | −0.0222 (−0.0273, −0.0171) |
1 Fully adjusted model was adjusted for sex, age, monthly income, education level, drinking status, smoking status, beverage intake, and BMI. 2 CI, confidence interval.