Table 1.
Demographic Characteristics at Baseline
| Normal Stayers | MCI INCIDENCE | Overall Sample | |||||
|---|---|---|---|---|---|---|---|
|
| |||||||
| MCI Overall | Subgroups
|
||||||
| aMCI | naMCI | Dementia (MCI Skippers)* | |||||
| Frequency | 5883 | 1143 | 763 | 253 | 127 | 7026 | |
| Age (mean+std) | 75.2(9.9) | 80.5(9.3) | 81.2(9.3) | 77.5(9.4) | 82.4(7.5) | 76.0(10.0) | |
| Age Categories | |||||||
| • Age≥90 | 4.90% | 13.60% | 15.80% | 6.80% | 13.30% | 6.30% | |
| • Age between 80 and 89 | 25.60% | 38.50% | 38.50% | 33.60% | 49.10% | 27.60% | |
| • Age between 70 and 79 | 39.30% | 34.30% | 33.90% | 36.50% | 32.40% | 38.50% | |
| • Age between 60 and 69 | 23.60% | 11.50% | 10.00% | 19.40% | 4.20% | 21.60% | |
| • Age between 50 and 59 | 5.40% | 1.50% | 1.00% | 3.40% | 1.00% | 4.80% | |
| • Age<50 | 1.30% | 0.60% | 0.70% | 0.40% | 0.00% | 1.20% | |
| Women | 67.20% | 60.50% | 61.10% | 56.50% | 65.40% | 66.10% | |
| Years of Education (mean+std) | 15.7 (3.0) | 15.3 (3.2) | 15.4 (3.0) | 15.2 (3.6) | 14.8 (3.5) | 15.7 (3.0) | |
| Non-white | 17.60% | 15.40% | 15.20% | 17.80% | 11.80% | 17.20% | |
| Missing Race | 0.20% | 0.30% | 0.50% | 0.00% | 0.00% | 0.20% | |
*
: Those who received diagnosis of dementia without observing MCI incidence within 4 years from baseline. These subjects were included when outcome is overall MCI, assuming that they experienced MCI stage within 4 years, before having the diagnosis of dementia.