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Table 1 Demographics of the study population

From: Familial and sporadic idiopathic pulmonary fibrosis: making the diagnosis from peripheral blood

        Disease severity
  N Control (%) Spoaradic (%) Familial (%) Age-yrs. (mean ± sd) Gender (%male) Mild Moderate Severe Unknown
Total 115 26 (23%) 48 (42%) 41 (36%) 66.2 ± 12.1 62 23 (26%) 44 (49%) 14 (16%) 8 (9%)
Training 76 17 (22%) 33 (43%) 26 (34%) 66.3 ± 13.4 58 15 (26%) 29 (49%) 9 (15%) 6 (10%)
Validate 39 9 (23%) 15 (38%) 15 (38%) 66.1 ± 9.4 69 8 (27%) 15 (50%) 5 (17%) 2 (7%)