Factors | Statistical methods | P-values |
---|---|---|
Age | Mann-Whitney U test | 0.737 |
Gender | χ2 test | 0.200 |
Disease severity score | χ2 test | 0.266 |
Smoking history | χ2 test | 0.594 |
Dust exposure history | χ2 test | 0.916 |
Dyspnea | χ2 test | 0.886 |
Cough | χ2 test | 0.870 |
Duration | Mann-Whitney U test | 0.114 |