Table 4.
Completeness of individual survey elements
| Survey elements | Completeness n (%) |
|---|---|
| Self-administered questionnaire | 1557 (99.9%)a |
| Online | 1008 (64.7%) |
| By paper | 549 (35.3%) |
| Interview with research nurse | |
| Health questionnaire (global) | 1438 (92.3%) |
| e-FFQ | 1432 (91.9%) |
| ADL/IADL | 1437 (92.2%) |
| Anthropometry | 1434 (92.0%) |
| Blood pressure | 1435 (92.1%) |
| CANTAB® | 1419 (91.1%) |
| MMSE-2 | 1436 (92.2%) |
| Tanita® | 1402 (90.0%) |
| ECG | 1428 (91.7%) |
| Complior® | 1404 (90.1%) |
| Physical tests (finger tapping test, balance test, grip strength test, chair rising test) | 1431 (91.8%) |
| Step test / Actiheart® | 1006 (64.6%) |
| Accelerometry /Actigraph® | 1190 (76.4%) |
| Blood samples | 1382 (89.0%) |
| Urine samples | 1329 (85.3%) |
| Hair samples | 857 (55.0%) |
aOne participant attended the interview but refused to fill-in the self-reported questionnaire