Table 2.
Characteristics of participants and non-participants in the DanACo cohort and the LiKO-15 and DiaKO-19 studies
| DanACo cohort | LiKO-15 study | DiaKO-19 study | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Participants | Non-participants | P-value | Participants | Non-participants | P-value | Participants | Non-participants | P-value | |
| Total, n(%) | 5340 (14.3) | 32,104* (85.7) | 2611 (13.1) | 17,277 (86.9) | 2729 (12.8) | 18,632 (87.2) | |||
| Birth year, Mean(SD) | 1954.1 (3.2) | 1954.6 (3.2) | < 0.001 | 1954.4 (3.2) | 1955.0 (3.2) | < 0.001 | 1953.9 (3.1) | 1954.3 (3.1) | < 0.001 |
| Conscription board examination | |||||||||
| Age, Mean(SD) | 20.4 (2.1) | 20.0 (1.8) | < 0.001 | 20.3 (2.0) | 19.8 (1.7) | < 0.001 | 20.5 (2.2) | 20.0 (1.9) | < 0.001 |
| BPP-score, Mean(SD) | 46.6 (9.5) | 39.8 (11.3) | < 0.001 | 46.2 (9.8) | 38.9 (11.4) | < 0.001 | 47.0 (9.3) | 40.6 (11.1) | < 0.001 |
| Educational level, n(%) | < 0.001 | < 0.001 | < 0.001 | ||||||
| Low | 1492 (28.0) | 15,965 (49.8) | 782 (30.0) | 9017 (52.2) | 710 (26.0) | 8904 (47.9) | |||
| Medium | 1784 (33.5) | 9118 (28.4) | 871 (33.5) | 4856 (28.1) | 913 (33.5) | 5319 (28.6) | |||
| High | 2053 (38.5) | 6976 (21.8) | 950 (36.5) | 3392 (19.7) | 1103 (40.5) | 4370 (23.5) | |||
| Height, Mean(SD) | 179.4 (6.7) | 178.5 (7.8) | < 0.001 | 179.3 (7.1) | 178.5 (8.6) | < 0.001 | 179.5 (6.4) | 178.5 (6.6) | < 0.001 |
| Weight, Mean(SD) | 69.6 (9.2) | 69.1 (11.5) | < 0.001 | 69.0 (8.9) | 68.5 (12.6) | 0.012 | 70.3 (9.5) | 69.5 (10.0) | < 0.001 |
| Information from hospital registers | |||||||||
| Admission to a psychiatric ward, n(%) | 112501 (21.1) | 8814 (27.5) | < 0.001 | 863 (33.1) | 8068 (46.7) | < 0.001 | 262 (9.6) | 3007 (16.1) | < 0.001 |
| Charlson Comorbidity Index score, Mean(SD) | 1.0 (1.7) | 1.3 (2.0) | < 0.001 | 0.9 (1.6) | 1.3 (2.1) | < 0.001 | 1.1 (1.7) | 1.3 (1.9) | < 0.001 |
Abbreviations: DanACo Danish Aging and Cognition cohort, LiKO-15 Lifestyle and Cognition Follow-up study 2015, DiaKO-19 Diabetes and Cognition Follow-up study 2019, SD Standard deviation, BPP Børge Prien’s Prøve (the military intelligence test)
*3,805 non-participants from the LiKO-15 study were also invited to the DiaKO-19 study. Consequently, the total number of non-participants in the DanACo cohort (n = 37,444) is equal to the combined number of non-participants from the LiKO-15 and DiaKO-19 studies (35,909) minus the 3,805 participants that were invited twice