Table 3.
Main socio-demographic characteristics and smoking status of people participating to either ISAYA (1998–2000) or GEIRD (2007–2010) in four centers
| ISAYA | GEIRD | p-value | |
|---|---|---|---|
| (n = 8931) | (n = 5162) | ||
| Centres | <0.001 | ||
| Verona | 2166 (24.3%) | 1746 (33.8%) | |
| Pavia | 2444 (27.4%) | 966 (18.7%) | |
| Turin | 2266 (25.4%) | 1205 (23.3%) | |
| Sassari | 2055 (23.0%) | 1245 (24.1%) | |
| Sex | <0.001 | ||
| Men | 4439 (49.7%) | 2397 (46.4%) | |
| Women | 4492 (50.3%) | 2765 (53.6%) | |
| Occupation | <0.001 | ||
| Clerk | 3444 (38.7%) | 2114 (41.3%) | |
| Housewife | 786 (8.8%) | 352 (6.9%) | |
| Manager | 151 (1.7%) | 90 (1.8%) | |
| Businessman | 268 (3.0%) | 153 (3.0%) | |
| Free-lancer | 901 (10.1%) | 570 (11.1%) | |
| Workman | 1381 (15.5%) | 777 (15.2%) | |
| Unemployed | 564 (6.3%) | 316 (6.2%) | |
| Student | 864 (9.7%) | 549 (10.7%) | |
| Retired | 42 (0.5%) | 20 (0.4%) | |
| Other job | 498 (5.6%) | 175 (3.4%) | |
| Smoking habits | <0.001 | ||
| Never smokers | 4356 (49.0%) | 2809 (55.4%) | |
| Ex-smokers | 1404 (15.8%) | 915 (18.0%) | |
| Current smokers | 3138 (35.3%) | 1347 (26.6%) | |
| Age (mean ± SD) | 33.4 ± 6.8 | 34.8 ± 7.1 | <0.001 |