Table 2.
Annual conversion rate from MCI to dementia and annual reversion rate from MCI to cognitive normal
| Type | Baseline |
Follow-up |
||||
|---|---|---|---|---|---|---|
| Dementia |
Cognitive normal |
|||||
| n | Person-years | n | Rate, per 100 person-years (95%CI) | n | Rate, per 100 person-years (95%CI) | |
| MCI | 362 | 1314.2 | 79 | 6.0 (4.7–7.3) | 102 | 7.8 (6.3–9.2) |
| aMCI | 238 | 859.7 | 59 | 6.9 (5.2–8.6) | 77 | 9.0 (7.1–10.9) |
| aMCI-SD | 156 | 564.1 | 17 | 3.0 (1.6–4.4) | 71 | 12.6 (9.9–15.3) |
| aMCI-MD | 82 | 295.6 | 42 | 14.2 (10.2–18.2) | 6 | 2.0 (0.4–3.6) |
| naMCI | 124 | 454.5 | 20 | 4.4 (2.5–6.3) | 25 | 5.5 (3.4–7.6) |
| naMCI-SD | 91 | 328.4 | 9 | 2.7 (1.0–4.5) | 24 | 7.3 (4.5–10.1) |
| naMCI-MD | 33 | 126.1 | 11 | 8.7 (3.8–13.7) | 1 | 0.8 (−0.8 to 2.3) |
Abbreviations: MCI, mild cognitive impairment; aMCI-SD, amnestic mild cognitive impairment single domain; aMCI-MD, amnestic mild cognitive impairment multiple domains; naMCI-SD, non-amnestic mild cognitive impairment single domain; naMCI-MD, non-amnestic mild cognitive impairment multiple domains.