Risk ratios from Cox proportional hazard models predicting survival in patients with idiopathic interstitial pneumonia
| Parameters in model | Risk ratio (95% CI) | p-value |
| Model excluding histological subclassification | ||
| Patient age | 1.01 (0.97–1.05) | 0.73 |
| Female sex | 0.53 (0.25–1.14) | 0.11 |
| Positive smoking history | 0.43 (0.18–1.01) | 0.05 |
| Physiological CRP score | 1.07 (1.02–1.12) | 0.009 |
| Time of onset of symptoms | 1.04 (0.96–1.14) | 0.32 |
| CTfib≥2 in at least one lobe | 3.35 (1.21–9.25) | 0.02 |
| Model including histological subclassification | ||
| UIP diagnosis | 28.46 (5.47–147.98) | 0.0001 |
| Patient age | 0.99 (0.95–1.03) | 0.55 |
| Female sex | 0.31 (0.13–0.72) | 0.006 |
| Positive smoking history | 0.30 (0.13–0.72) | 0.009 |
| Physiological CRP score | 1.06 (1.01–1.11) | 0.02 |
| Time of onset of symptoms | 1.02 (0.93–1.12) | 0.73 |
| CTfib≥2 in at least one lobe | 0.77 (0.29–2.04) | 0.60 |
CI: confidence interval
CRP: clinical, radiographical and physiological [score] 7
CTfib: interstitial component of the high-resolution computed tomography (see high-resolution computed tomography section for details)
UIP: usual interstitial pneumonia