| Description: | Status of online questionnaire completed by participant |
| Category: | Specialist questionnaire data ⏵ Covid questionnaires ⏵ Data collection information |
| Participants | 1,572 | Value Type | Categorical (single) | Sexed | Both sexes | Debut | Sep 2024 | |||
| Item count | 2,968 | Item Type | Data | Instances | Defined (2) | Version | N/A | |||
| Stability | Complete | Strata | Primary | Array | No | Cost Tier | dX oX sX |
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Data has not been summarised because combining instances would be misleading.
Instance 31 : 2021 - Third covid questionnaire at age 75 years.
1,399 participants, 1,399 items
National Survey of Health and Development 1946 Cohort