Table 1 Participants’ characteristics values are shown as n (%) or mean ± standard deviation
|  | Total (N = 426,282) | Past history of scrub typhus (n = 71,047) | Non-history of scrub typhus (n = 355,235) | P value |
|---|---|---|---|---|
Age | Â | Â | Â | Â |
 Mean age (years ± SD) | 70.6 ± 7.0 | 70.6 ± 7.0 | 70.6 ± 7.0 | > 0.999 |
 60–69 (n, %) | 200,580 (47.1) | 33,430 (47.1) | 167,150 (47.1) | > 0.999 |
 70–89 (n, %) | 225,702 (52.9) | 37,617 (52.9) | 188,085 (52.9) |  |
Sex | Â | Â | Â | Â |
 Male (n, %) | 159,126 (37.3) | 26,521 (37.3) | 132,605 (37.3) | > 0.999 |
 Female (n, %) | 267,156 (62.7) | 44,526 (62.7) | 222,630 (62.7) |  |
Comorbidity (n, %) | Â | Â | Â | Â |
 Stroke | 78,923 (18.5) | 13,804 (19.4) | 65,119 (18.3) | < 0.001 |
 Central degenerative disease | 33,325 (7.8) | 6876 (9.7) | 26,449 (7.4) | < 0.001 |
 Diabetes mellitus | 219,506 (51.5) | 40,010 (56.3) | 179,496 (50.5) | < 0.001 |
 Hypertension | 286,724 (67.3) | 47,067 (66.2) | 239,657 (67.5) | < 0.001 |
 Major depressive disorder | 108,146 (25.4) | 20,291 (28.6) | 87,855 (24.7) | < 0.001 |
Dementia subtype | Â | Â | Â | Â |
 All (n, %) | 53,425 (12.5) | 10,460 (14.7) | 42,965 (12.1) | < 0.001 |
 Alzheimer (n, %) | 38,828 (9.1) | 7770 (10.9) | 31,058 (8.7) |  |
 Vascular (n, %) | 947 (0.2) | 163 (0.2) | 784 (0.2) |  |
 Others (n, %) | 13,650 (3.2%) | 2527 (3.6%) | 11,123 (3.1%) |  |
 Follow-up duration (years ± SD) | 5.6 ± 2.9 | 5.7 ± 2.8 | 5.6 ± 2.9 | < 0.001 |