practically significantp < 0.0001
The statistically and practically significant differences in baseline characteristics amongst the participant categories were as expected for age ( p < 0.0001), disease duration ( p < 0.0001), ever smoker ( p = 0.0020), pack years ( p = 0.0003), antifibrotic treatment ( p < 0.0001), and immunosuppressive treatment ( p = 0.0003).