Table 1.
Characteristics of the study sample at baseline by incident MCI status (N = 864)
| Total sample (N = 864) |
Cognitively Normal (N = 792) |
Incident MCI (N = 72) |
Test statistic§, p-value |
|
|---|---|---|---|---|
| Age, mean (SD) | 78.3 (6.8) | 77.9 (6.7) | 82.0 (6.8) | 4.74, <0.0001 |
| Gender, n (%) Female | 547 (63.3) | 497 (62.8) | 50 (69.4) | 1.27, 0.2593 |
| Education, n (%) > HS | 403 (46.6) | 381 (48.1) | 22 (30.6) | 8.17, 0.0043 |
| Race, n (%) Non-white | 35 (4.1) | 31 (3.9) | 4 (5.6) | 0.5252 |
| MMSE Score, mean (SD) | 27.9 (1.9) | 28.0 (1.8) | 26.8 (2.3) | −5.06, <0.0001 |
| Depression Symptoms (N = 863), n (%) ≥ 1 symptoms | 125 (14.5) | 113 (14.3) | 12 (16.7) | 0.30, 0.5826 |
| Self-rated Health (N = 863), n (%) very good/excellent | 370 (42.9) | 349 (44.1) | 21 (29.2) | 6.03, 0.0141 |
| Prescription Medications, n (%) ≥ 4 medications | 479 (55.4) | 432 (54.6) | 47 (65.3) | 3.08, 0.0794 |
| Waist-to-hip Ratio, mean (SD) (N = 828) | 0.899 (0.087) | 0.898 (0.086) | 0.900 (0.100) | −0.25, 0.7999 |
| Cognitive Activity, mean (SD) | 44.0 (9.2) | 44.4 (9.1) | 39.2 (8.8) | −4.57, <0.0001 |
| Cognitive Activity, n (%) High | 422 (48.8) | 404 (51.0) | 18 (25.0) | 17.87, <0.0001 |
| Physical Activity, n (%) Yes | 597 (69.1) | 564 (71.2) | 33 (45.8) | 19.91, <0.0001 |
§
The continuous variables were examined by the Wilcoxon rank sum test and the categorical variables were examined by the Chi-squared test or Fisher's exact test when appropriate.