Table 1.
Characteristics of participants by MCI status.
| Total | Non-MCI | MCI | p-Value a | |
|---|---|---|---|---|
| N (n, %) | 1006 | 845 (84.0) | 161 (16.0) | |
| Age, years, mean (SD) | 63.7 (5.1) | 63.1 (4.9) | 66.5 (5.2) | <0.001 |
| Female (%) | 855 (85.0) | 718 (85.0) | 137 (85.1) | 0.968 |
| Living alone, n (%) | 71 (7.1) | 57 (6.8) | 14 (8.7) | 0.747 |
| Marital status, n (%) | ||||
| Married | 870 (86.5) | 734 (86.9) | 136 (84.5) | 0.416 |
| Single/widowed/divorced | 136 (13.5) | 111 (13.1) | 25 (15.5) | |
| Education level, n (%) | ||||
| Less than middle school | 107 (10.6) | 50 (5.9) | 57 (35.4) | <0.001 |
| Middle and high school | 762 (75.8) | 665 (78.7) | 97 (60.3) | |
| College or higher | 137 (13.6) | 130 (15.4) | 7 (4.4) | |
| Annual per capital income, n (%) | ||||
| <CNY 20,000 | 224 (22.3) | 177 (21.0) | 47 (29.2) | <0.001 |
| CNY 20,000–40,000 | 491 (48.8) | 403 (47.7) | 88 (54.7) | |
| >CNY 40,000 | 291 (28.9) | 265 (31.4) | 26 (16.2) | |
| BMI, n (%) | ||||
| <18.5 | 13 (1.3) | 9 (1.1) | 4 (2.5) | 0.056 |
| 18.5–23.9 | 454 (45.1) | 392 (46.4) | 62 (38.5) | |
| 24.0–27.9 | 424 (42.2) | 356 (42.1) | 68 (42.2) | |
| ≥28.0 | 103 (10.2) | 78 (9.2) | 25 (15.5) | |
| Smoking (current), n (%) | 59 (5.9) | 51 (6.0) | 8 (5.0) | 0.859 |
| Alcohol intake (current), n (%) | 201 (20.0) | 166 (19.6) | 35 (21.7) | 0.420 |
| Meeting physical activity recommendation, n (%) | 632 (62.8) | 550 (65.1) | 82 (50.9) | <0.001 |
| Retired, n (%) | 854 (84.9) | 729 (86.3) | 125 (77.6) | 0.005 |
| Hypertension, n (%) | 548 (54.5) | 447 (52.9) | 101 (62.7) | 0.022 |
| Diabetes, n (%) | 72 (7.2) | 61 (7.2) | 11 (6.8) | 0.862 |
| AVLT, score, mean (SD) | 28.8 (9.4) | 28.1 (9.6) | 18.9 (9.7) | <0.001 |
| VFT, score, mean (SD) | 16.6 (4.3) | 17.2 (4.1) | 13.0 (3.8) | <0.001 |
| DSST, score, mean (SD) | 30.6 (8.4) | 30.7 (8.4) | 18.9 (7.9) | <0.001 |
| TMT-B, seconds, mean (SD) | 56.3 (29.1) | 49.6 (19.4) | 91.6 (42.84) | <0.001 |
| Mg2+ (mg/L), mean (SD) | 36.4 (9.8) | 36.7 (9.7) | 34.7 (9.8) | 0.017 |
Data are expressed as the mean (SD) or n (%). Abbreviations: SD, standard deviation; MCI, mild cognitive impairment; AVLT, auditory verbal learning test; VFT, verbal fluency test; DSST, digit symbol substitution test; TMT-B, trail-making test B; BMI, body mass index; a p-value for a chi-square test or one-way analysis of variance.