Kaplan–Meier survival curves for patients with interstitial lung disease associated with primary Sjögren’s syndrome.

<p>(a) Survival curve for the total patient population. Five-year survival rate was 87.3%. (b) Comparison of survival curves between the NSIP (n = 22) and UIP (n = 11) patients. Open circles or open squares show censored cases in NSIP group or UIP group, respectively. The prognosis between the two groups was not significantly different (<i>P</i> = 0.93 in log–rank test). UIP: usual interstitial pneumonia; NSIP: nonspecific interstitial pneumonia.</p

Examples of pathological scoring (hematoxylin–eosin, × 100).

<p>Typical images in each grade of fibroblastic foci (straight arrows) [(a): grade 1 and (b): grade 3] and bronchiolar fibrosis [(c): grade 1 and (d): grade 3] were listed.</p