Table 1.
Characteristics of study participants stratified by cohort and future lung cancer status. The mean (standard deviation) and counts (percentage) are reported for continuous and categorical variables respectively
| EPIC-Italy | NOWAC | Full population | |||
|---|---|---|---|---|---|
| Controls (N = 512) | Cases (N = 185) | Controls (N = 314) | Cases (N = 128) | ||
| Sex (women) | 331 (65%) | 81 (44%) | 314 (100%) | 128 (100%) | 854 (75%) |
| Age (years) | 54 (6.8) | 54.5 (6.3) | 51.1 (6.9) | 56 (4.2) | 53.5 (6.7) |
| Smoking status | |||||
| Never | 257 (50%) | 26 (14%) | 136 (43%) | 14 (11%) | 433 (38%) |
| Former | 143 (28%) | 59 (32%) | 97 (31%) | 34 (27%) | 333 (29%) |
| Current | 112 (22%) | 100 (54%) | 81 (26%) | 80 (62%) | 373 (33%) |
| Smoking duration (years) | 12.1 (14.2) | 27.3 (14.3) | 15.9 (16.5) | 31.6 (14.8) | 17.8 (16.6) |
| Smoking intensity (cig./day) | 6 (8.9) | 14.4 (9.4) | 5.5 (5.8) | 10.3 (5.5) | 7.7 (8.6) |
| Comprehensive Smoking Index (CSI) | 0.5 (0.7) | 1.4 (0.8) | 0.7 (0.8) | 1.4 (0.7) | 0.8 (0.8) |
| Time to diagnosis (years) | 7.2 (3.7) | 3.9 (2.0) | 5.9 (3.5) | ||
| Centre (EPIC-Italy) | |||||
| Florence | 92 (18%) | 63 (34%) | |||
| Naples | 11 (2%) | 3 (2%) | |||
| Ragusa | 29 (6%) | 14 (8%) | |||
| Turin | 246 (48%) | 60 (32%) | |||
| Varese | 134 (26%) | 45 (24%) | |||