Baseline sociodemographic characteristics of participants in the NutriNet-Santé e-cohort (2009–2014, n=122 912) in comparison with 2009 national estimates for individuals aged ≥18 years in metropolitan France
| NutriNet-Santé: raw data, n (%) | Census estimates, %* | p Value† | ||
|---|---|---|---|---|
| Gender | <0.0001 | |||
| Male | 27 016 | (22.0) | 47.6 | |
| Female | 95 896 | (78.0) | 52.4 | |
| Age categories (years) | <0.0001 | |||
| 18–24 | 15 085 | (12.3) | 11.2 | |
| 25–39 | 40 862 | (33.2) | 24.9 | |
| 40–54 | 35 394 | (28.8) | 26.4 | |
| 55–64 | 23 472 | (19.1) | 15.8 | |
| 65+ | 8099 | (6.6) | 21.6 | |
| Birthplace | <0.0001 | |||
| France (including Corsica and overseas territories) | 116 704 | (94.9) | 86.5 | |
| Europe (excluding France) | 2519 | (2.1) | 4.5 | |
| Africa | 2882 | (2.3) | 6.8 | |
| Americas | 401 | (0.3) | 0.4 | |
| Asia and Oceania | 406 | (0.3) | 1.7 | |
| Marital status | <0.0001 | |||
| Single (never married, living alone) | 23 405 | (19.0) | 22.1 | |
| Widowed, divorced, separated | 12 459 | (10.1) | 15.9 | |
| Married or cohabiting | 87 048 | (70.8) | 62.0 | |
| Educational level | <0.0001 | |||
| Up to secondary | 47 344 | (38.5) | 75.1 | |
| Some college | 36 962 | (30.1) | 11.9 | |
| University degree | 38 606 | (31.4) | 13.0 | |
| Employment status | <0.0001 | |||
| Unemployed, disabled, homemaker | 15 489 | (12.6) | 8.8 | |
| Student | 10 762 | (8.8) | 4.5 | |
| Farmer, manual labour | 2173 | (1.8) | 14.9 | |
| Artisan, self-employed | 2226 | (1.8) | 3.4 | |
| Office worker, skilled labour | 44 057 | (35.8) | 31.8 | |
| Executive, professional staff | 27 180 | (22.1) | 9.1 | |
| Retired | 21 025 | (17.1) | 27.4 | |
| Presence of children <18 years in household | <0.0001 | |||
| No | 80 934 | (65.8) | 63.4 | |
| Yes | 41 978 | (34.2) | 36.6 | |
| Geographical area of residence‡ | <0.0001 | |||
| Paris metropolitan area | 26 061 | (21.2) | 18.5 | |
| Paris basin | 18 241 | (14.8) | 17.1 | |
| North | 5761 | (4.7) | 6.3 | |
| East | 10 161 | (8.3) | 8.6 | |
| East-center | 16 503 | (13.4) | 12.0 | |
| West | 17 430 | (14.2) | 13.6 | |
| Southwest | 13 495 | (11.0) | 11.2 | |
| South–Mediterranean | 15 260 | (12.4) | 12.7 | |
*Census data from INSEE (Institut national de la statistique et des études économiques).
†Results of χ2 goodness-of-fit tests comparing unweighted (raw) cohort data against Census estimates.
‡Geographical division based on the ZEAT (Zone d’études et d’aménagement du territoire) developed by INSEE.