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Table 2 Baseline demographics of lung cancer patients with and without idiopathic pulmonary fibrosis (IPF) from institution, and lung cancer in overall population of state of Pennsylvania

From: Characteristics of lung cancer among patients with idiopathic pulmonary fibrosis and interstitial lung disease – analysis of institutional and population data

Variables Lung cancer with IPF Lung cancer without IPF (institutional data) Lung cancer without IPF (population data) p-values column 1 vs. 3
N Results N Results N Results
Age in years, median (IQR) 31 65 (62–71) 4176 67 (60–75) 104,954 69 (61–77) 0.03
Gender (% male) 31 19 (61%) 4176 2023 (48%) 104,954 53,800 (51%) 0.16
Ethnicity (% Caucasian) 31 30 (97%) 4176 3679 (88%) 104,954 89,643 (85%) 0.07
Smoking – never 31 7 (23%) 4176 395 (10%) NA < 0.001 (column 1 vs 2)
former 24 (77%) 2362 (57%)
current 0 1361 (33%)
Mortality over observation period (%) 31 26 (84%) 4176 2644 (63%) 104,954 78,254 (75%) 0.2
Survival time in months, median (IQR) 26 5 (1–10) 4176 13 (6–26) NA NA 0.002 (column 1 vs 2)
  1. Definition of abbreviations: IQR Interquartile range. Column 1 = Lung cancer with IPF; column 2 = Lung cancer with non-IPF ILD; column 3 = Lung cancer in general population in Pennsylvania. NA not available. Survival time was calculated by the time from lung cancer diagnosis to the date of expiration, or the time of registry data review