Degree of inconsistent self-reports in a repeated survey based on two time periods (baseline and the 4-year follow-up), sorted by disease prevalence at the baseline survey
| Disease prevalence at baseline | Inconsistent self-reported diseases between two time periods | ||||
| Number of subjects* | One disease | Two diseases | Three or more diseases | ||
| Overall, n (%) | 7396 (89.8) | 3193 (43.2) | 2086 (28.2) | 748 (10.1) | 359 (4.9) |
| Disease categories (number of sub-conditions), n (%) | |||||
| Cardiovascular (8) | 4304 (52.3) | 879 (20.6) | 743 (17.4) | 118 (2.8) | 18 (0.4) |
| Rheumatological (4) | 2610 (31.8) | 761 (29.4) | 727 (28.1) | 32 (1.2) | 2 (0.1) |
| Gastrointestinal (5) | 2352 (28.6) | 512 (22.1) | 494 (21.3) | 17 (0.7) | 1 (0.0) |
| Cancer (22) | 1916 (23.3) | 455 (23.9) | 404 (21.3) | 43 (2.3) | 8 (0.4) |
| Eye (4) | 3358 (40.9) | 321 (9.7) | 300 (9.1) | 21 (0.6) | 0 (0.0) |
| Respiratory (4) | 1846 (22.5) | 320 (17.5) | 310 (17.0) | 10 (0.6) | 310 (17.0) |
| Mental health (6) | 2382 (29.0) | 640 (27.3) | 544 (23.2) | 89 (3.8) | 7 (0.3) |
| Neurological (6) | 1839 (22.4) | 382 (21.1) | 368 (20.3) | 11 (0.6) | 3 (0.2) |
| Gynaecological (1) | 488 (9.2) | 90 (18.4) | 90 (18.4) | NA | NA |
| Liver (2) | 255 (3.1) | 61 (24.6) | 58 (23.4) | 3 (1.2) | NA |
| Haematological (1) | 30 (0.003) | 15 (50.0) | 15 (50.0) | NA | NA |
*The number of subjects having at least one prevalent disease with inconsistent reporting (ie, self-reported ‘ever’ having the disease at the baseline but ‘never’ had it at the follow-up survey).
NA, not applicable.