Table 1—

Distribution of 57 cases of lung cancer and 3,749 controls according to selected characteristics

CharacteristicsLung cancer casesControls
Study
 Pilot study36 (63.2)834 (22.2)
 MILD study21 (36.8)2915 (77.8)
Sex
 Male45 (78.9)2554 (68.1)
 Female12 (21.1)1195 (31.9)
Age yrs
 <5511 (19.3)1295 (34.5)
 55–6433 (57.9)1934 (51.6)
 ≥6513 (22.8)520 (13.9)
Smoking status
 Current47 (82.5)2798 (74.7)
 Former10 (17.5)949 (25.3)
Number of cigarettes
 <205 (8.8)877 (23.4)
 20–2415 (26.3)1580 (42.1)
 25–294 (7.0)293 (7.8)
 ≥3033 (57.9)999 (26.6)
Duration of smoking yrs
 <302 (3.5)569 (15.2)
 30–348 (14.0)845 (22.6)
 35–399 (15.8)801 (21.4)
 ≥4038 (66.7)1532 (40.9)
Pack-yrs of smoking
 <356 (10.5)1568 (41.9)
 35–449 (15.8)1025 (27.4)
 ≥4542 (73.7)1151 (30.7)
  • Data are presented as n (%). MILD: Multicentric Italian Lung Detection.