Table 1.
Main characteristics of study population
| Cases N = 716 (%) | Controls N = 757 (%) | p | |
|---|---|---|---|
| AGE | |||
| < 50 | 95 (13.3) | 86 (11.4) | |
| [50–60[ | 196 (27.4) | 175 (23.1) | |
| [60–70[ | 309 (43.2) | 353 (46.6) | |
| ≥ 70 | 116 (16.2) | 143 (18.9) | 0.10 |
| mean (SD) | 60.9 (9.4) | 61.9 (9.5) | 0.79 |
| AREA OF RESIDENCE (‘Département’) | |||
| 75 Paris | 289 (40.4) | 315 (41.6) | |
| 77 Seine-et-Marne | 27 (3.8) | 22 (2.9) | |
| 78 Yvelines | 32 (4.5) | 30 (4.0) | |
| 91 Essonne | 24 (3.4) | 24 (3.2) | |
| 92 Hauts-de-Seine | 116 (16.2) | 124 (16.4) | |
| 93 Seine-Saint-Denis | 84 (11.7) | 73 (9.6) | |
| 94 Val-de-Marne | 130 (18.2) | 156 (20.6) | |
| 95 Val-d’Oise | 14 (2.0) | 13 (1.7) | 0.78 |
| EDUCATION | |||
| University | 336 (47.1) | 372 (49.1) | |
| High school | 117 (16.4) | 141 (18.6) | |
| Middle school | 199 (27.9) | 211 (27.9) | |
| Elementary school or less | 62 (8.7) | 33 (4.4) | 0.01 |
| BMI 2 years BEFORE THE INTERVIEW (kg/m2) | |||
| < 18.5 | 62 (8.7) | 37 (4.9) | |
| [18.5–25.0[ | 402 (56.2) | 350 (46.3) | |
| [25.0–30.0[ | 161 (22.5) | 207 (27.4) | |
| ≥ 30.0 | 90 (12.6) | 162 (21.4) | < 0.001 |
| mean (SD) | 24.2 (5.3) | 25.8 (5.7) | 0.03 |
| HISTOLOGIC TYPES | Cases N (%) | ||
| Adenocarcinoma | 514 (71.8) | – | |
| Squamous cell carcinoma | 67 (9.4) | – | |
| Large cell carcinoma | 28 (3.9) | – | |
| Small cell carcinoma | 88 (12.3) | – | |
| Others | 19 (2.6) | – | |
Abbreviations: BMI body mass index; SD standard deviation
Descriptive analysis were drawn using the Student test for continuous variables and the X2 Pearson test for categorical variables