Introduction
Methods
The Rotterdam study
The sub-study
Case definition COVID-19
Other covariates
Statistical analysis
Results
Response rates
Date sent | Paper | Digital | Total | ||||
---|---|---|---|---|---|---|---|
Number sent | Number returned | Number sent | Number returned | Number sent | Number returned | ||
Questionnaire 1 | 20th April, 2020 | 8732 | 6241* | NA | NA | 8732 | 6241* |
Questionnaire 2 | 7th May, 2020 | 8687 | 5650 | NA | NA | 8687 | 5650 |
Questionnaire 3 | 22th May, 2020 | 3182 | 2824 | 2426 | 2053 | 5608 | 4877 |
Questionnaire 4 | 24st June, 2020 | 3493 | 2741 | 2470 | 2038 | 5963 | 4779 |
Questionnaire 5 | 30th July, 2020 | 3354 | 2456 | 2508 | 1997 | 5862 | 4453 |
Questionnaire 6 | 15th October, 2020 | 3322 | 2711 | 2495 | 2002 | 5817 | 4713 |
Total | 30,770 | 22,623 | 9899 | 8090 | 40,669 | 30,713 |
Collection of data in relation to SARS-CoV-2 infection rates and governmental countermeasures
Baseline demographics
Characteristics | |
---|---|
Age (mean [SD]) | 70.16 (11.63) |
Women | 3643 (58.4) |
Education | |
Primary | 409 (6.6) |
Lower/intermediate or lower vocational | 2095 (33.6) |
Intermediate vocational or higher general | 1977 (31.7) |
Higher vocational or university | 1698 (27.2) |
Self-appreciation of health | |
Excellent | 432 (7.5) |
Very good | 1195 (20.6) |
Good | 3340 (57.6) |
Fair | 761 (13.1) |
Poor | 69 (1.2) |
Self-report of chronic diseases | 3815 (61.1)* |
Cancer | 852 (13.7) |
Cardiovascular disease | 1702 (27.3) |
Stroke | 445 (7.1) |
Chronic lung disease | 827 (13.3) |
Neurodegenerative disease | 99 (1.6) |
Diabetes | 570 (9.1) |
Mental illness | 266 (4.3) |
Other# | 1159 (18.6) |