Table 3.
Multiple linear regression model with log-FENO as the dependent variable in relation to age, height, gender, smoking status and spirometry among 39 healthy subjects.
| Variable | Coefficient | Std. Error | t | p | [95% confidence interval] | |
| Constant | -2.13 | 0.641 | -3.32 | 0.001 | -3.394 | -0.867 |
| Age (year) | 0.00003 | 0.002 | -0.02 | 0.987 | -0.003 | 0.003 |
| Height (cm) | 0.011 | 0.003 | 3.71 | <0.001 | 0.005 | 0.017 |
| Gender: Men vs. Women | -0.098 | 0.046 | -2.14 | 0.034 | -0.188 | -0.008 |
| Smoker vs. Non-smoker | -0.227 | 0.033 | -6.94 | <0.001 | -0.292 | -0.163 |
| FEV1/FVC (% predicted) | 0.017 | 0.002 | 7.40 | <0.001 | 0.013 | 0.022 |