Characteristics of the pa rticipants of the ‘Bus Santé’ study, Geneva, Switzerland, according to study period*
| Period 1 | Period 2 | Period 3 | Period 4 | Period 5 | Period 6 | p Value | |
|---|---|---|---|---|---|---|---|
| Sample size | 6403 | 1550 | 4094 | 920 | 1928 | 4068 | |
| Women (%) | 3416 (50.0) | 841 (51.0) | 2178 (49.6) | 465 (47.0) | 1003 (49.0) | 2087 (48.6) | 0.492 |
| Age (years) mean, SD | 48.6, 11.9 | 49.2, 12.1 | 48.9, 12.1 | 47.4, 11.6 | 48.8, 12.2 | 48.1, 13.5 | 0.006 |
| BMI (kg/m2) mean, SD | 24.3, 3.8 | 24.4, 3.9 | 25.6, 18.4 | 27.9, 34.2 | 25.4, 10.6 | 25.2, 7.7 | <0.001 |
| Marital status (%) | <0.001 | ||||||
| Single | 593 (11.0) | 150 (10.6) | 439 (12.5) | 90 (11.1) | 213 (12.2) | 481 (15.7) | |
| Married/cohabitating | 4789 (74.7) | 1140 (74.3) | 2961 (72.8) | 668 (72.4) | 1393 (73.5) | 2911 (70.0) | |
| Divorced | 765 (10.8) | 201 (11.7) | 522 (11.0) | 133 (13.8) | 276 (12.2) | 568 (11.9) | |
| Widowed | 256 (3.5) | 59 (3.4) | 172 (3.7) | 29 (2.7) | 46 (2.1) | 108 (2.4) | |
| Education (%) | <0.001 | ||||||
| University | 1954 (32.3) | 503 (34.2) | 1433 (37.2) | 358 (42.1) | 792 (42.2) | 1852 (47.7) | |
| Lower than university | 4449 (67.7) | 1047 (65.8) | 2661 (62.8) | 562 (57.9) | 1136 (57.8) | 2216 (52.3) | |
| Smoking status (%) | <0.001 | ||||||
| Never smoked | 2849 (43.4) | 697 (44.2) | 1840 (45.6) | 428 (47.0) | 869 (45.4) | 2011 (50.5) | |
| Ex-smoker | 1510 (25.8) | 376 (27.0) | 939 (24.2) | 212 (24.5) | 441 (23.7) | 992 (24.4) | |
| Current smoker | 2044 (30.8) | 477 (28.8) | 1315 (30.2) | 280 (28.5) | 618 (30.9) | 1065 (25.1) | |
| Country of birth (%) | <0.001 | ||||||
| Switzerland | 4647 (72.1) | 1167 (74.8) | 2917 (69.6) | 628 (66.0) | 1378 (68.6) | 2788 (66.1) | |
| Other | 1756 (27.9) | 383 (25.2) | 1177 (30.4) | 292 (34.0) | 550 (31.4) | 1280 (33.9) | |
| Total energy intake (kcal/da y) mean, SD | 2002.4, 640.7 | 2022.0, 637.7 | 1994.8, 632.6 | 1960.6, 608.6 | 1918.6, 647.2 | 1896.9, 639.8 | <0.001 |
*Figure 1 provides details on the dates of each period. Results are expressed as number of participants (percentage) or mean±SD. Proportions and means (SD) are weighted.
BMI, body mass index.