Table 3. Multivariate logistic regression model to predict a poor quality of life in bronchial asthma.
Abbreviations: BMI, body mass index; CI, confidence interval; OR, odds ratio; SE, standard error.
Dependent variable = Quality of Life (Poor, Better)
Model Summary: Model Accuracy = 90.3%; -2 Log likelihood = 83.14; Cox & Snell R Square = 43.6%; Nagelkerke R Square= 62.5%
| Variables | Regression Coefficient | SE | P-value | OR | 95% CI for OR | |
| Lower | Upper | |||||
| Advance Age (≥ 40 Years) | 1.387 | .592 | .019 | 4.00 | 1.25 | 12.76 |
| Obesity (BMI ≥25 kg/m2) | .844 | .671 | .208 | 2.32 | 0.62 | 8.65 |
| Female Gender | 1.732 | .727 | .017 | 5.65 | 1.36 | 23.50 |
| Uneducated Patients | .617 | .666 | .354 | 1.85 | 0.50 | 6.84 |
| Low Socioeconomic status | .638 | .683 | .350 | 1.89 | 0.49 | 7.21 |
| Family History of Asthma (Yes) | .862 | .575 | .134 | 2.36 | 0.76 | 7.30 |
| Smoker (Yes) | 1.112 | .688 | .106 | 3.04 | 0.79 | 11.71 |
| Pet At Home(Yes) | 1.806 | .821 | .028 | 6.08 | 1.21 | 30.45 |
| Residency (Rural) | .268 | .601 | .656 | 1.30 | 0.40 | 4.24 |
| Duration of Asthma (Months) | .087 | .080 | .278 | 1.09 | 0.93 | 1.27 |
| Duration of Treatment of Asthma (weeks) | -.046 | .097 | .636 | 0.95 | 0.78 | 1.15 |
| Severity of Asthma (Moderate) | 2.617 | .672 | .0005 | 13.68 | 3.66 | 51.12 |
| Constant | -4.669 | 1.810 | .010 | .009 | ||