Table 3.
Univariate and multivariate odds ratio of asthma control (Partly controlled and uncontrolled combined)* according to asthma risk factors and smoking variables
| Variables | Univariate Odds Ratio (95% CI) | P value | Multivariate Odds Ratio (95% CI) | P value |
| Gender | ||||
| Female | 1.00 | |||
| Male | 1.19 (0.61-2.32) | P = 0.61 | ||
| Age | 1.06 (1.00-1.12) | P = 0.06 | ||
| Model 1 (n = 56) | 0.53 (0.16-1.78) | P = 0.30 | 0.53 (0.16-1.81) | P = 0.31 |
| Passive Smoking | ||||
| Model 2 (n = 140) | ||||
| Current or Former | 5.18 (2.47-10.90) | P < 0.0001 | 5.18 (2.43-11.02) | P < 0.0001 |
| Smoker | ||||
| Model 3 (n = 114) | ||||
| Packs per Year | ||||
| Never Smoker 0 | 1.00 | 1.00 | ||
| 1-10 packs 1 | 4.69 (1.55-14.13) | P = 0.006 | 5.51 (1.73-17.54) | P = 0.004 |
| >10 packs 2 | 15.03 (5.25-43.03) | P < 0.0001 | 13.38 (4.57-39.19) | P < 0.0001 |
| Model 4 (n = 130) | ||||
| Smoking Status | ||||
| Never Smoker 0 | 1.00 | 1.00 | ||
| Former Smoker 1 | 1.64 (0.51-5.30) | P = 0.41 | 1.70 (0.52-5.58) | P = 0.38 |
| Current Smoker 2 | 9.46 (4.03-22.24) | P = <0.0001 | 9.54 (3.98-22.88) | P < 0.0001 |
Model 1: Reference group are nonsmokers not exposed to passive smoking. Past and current smokers excluded.
Model 2: Reference group are nonsmokers. No exclusions.
Model 3: Past smokers and those who quit during follow up excluded.
Model 4: Those who quit smoking during follow up excluded
* Uncontrolled combined with Partly Controlled because only 18 individuals were in the Uncontrolled category. Now we have 70 individuals in the Controlled category and 70 individuals in the Uncontrolled and Partly Controlled categories combined.