Table 1. Select baseline characteristics of the study population (lung cancer cases and controls) recruited in the IARC case-control study (Moscow, Russia, 2006–2012).
| Characteristics | Cases | Controls | p value a |
|---|---|---|---|
| N = 100 | N = 100 | ||
| Sex | 0.010 | ||
| Female | 14 | 29 | |
| Male | 86 | 71 | |
| Age at interview, mean (SD) | 62.6 (7.5) | 60.1 (9.7) | 0.037 |
| Smoking status | <0.001 | ||
| Never | 11 | 40 | |
| Former | 27 | 12 | |
| Current | 62 | 48 | |
| Pack-years (among smokers only) mean (SD) | 47.8 (22.5) | 29.8 (15.2) | <0.001 |
| Alcohol drinking status | 0.029 | ||
| Never | 23 | 36 | |
| Former | 23 | 11 | |
| Current | 54 | 53 | |
| Body mass index (BMI) [kg/m2] mean (SD) | 26.2 (4) | 27.3 (4.7) | 0.058 |
| Histological type | |||
| Squamous cell carcinoma | 65 | ———- | |
| Adenocarcinoma | 35 | ———- | |
| Clinical stage | |||
| IA | 16 | ———- | |
| IB | 33 | ———- | |
| IIA | 6 | ———- | |
| IIB | 15 | ———- | |
| IIIA | 30 | ||
| Years of follow-up, mean (SD) | 2.48 (1.69) | ———- | |
| Vital status at the end of follow-up | |||
| Dead | 64 | ———- | |
| Alive | 36 | ———- |
a p value calculated using χ2 test for categorical variables and Student’s t-test for continuous variables.