Table 2.
Comparison of demographic characteristics of participants in the mild cognitive impairment and normal cognition function subsets in the training set (579/827, 70% of the data set).
| Characteristics | Normal cognition function subset (n=402) | Mild cognitive impairment subset (n=177) | χ2 (df)/Z | P value |
|
|
| Age (year)a | 64.5 (60.00-70.00) | 66.00 (62.00-71.00) | 1.974 (1) | .048 |
|
|
| Sex, n (%) |
|
|
0.170 (1) | .68 |
|
|
|
|
Male | 148 (36.8) | 62 (35.0) |
|
|
|
| Female | 254 (63.2) | 115 (65.0) |
|
|
||
| Education (year)a | 12.00 (9.00-14.00) | 9.00 (9.00-12.00) | –6.818 (1) | <.001 |
|
|
| BMI (kg/m2)a | 23.30 (21.48-25.59) | 23.74 (21.70-25.29) | 0.137 (1) | .89 |
|
|
| Concomitant chronic disease, n (%) |
|
|
4.130 (2) | .12 |
|
|
|
|
Nil | 205 (51.0) | 78 (44.1) |
|
|
|
| n=1 | 140 (34.8) | 63 (35.6) | ||||
| n≥2 | 57 (14.2) | 36 (20.3) | ||||
| Smoking, n (%) |
|
|
0.176 (1) | .68 |
|
|
|
|
Yes | 30 (7.5) | 15 (8. 5) |
|
|
|
| No | 372 (92.5) | 162 (91.5) | ||||
| Drinking, n (%) |
|
|
0.743 (1) | .39 |
|
|
|
|
Yes | 78 (19.4) | 29 (16.4) |
|
|
|
| No | 324 (80.6) | 148 (83.6) | ||||
| Proficiency using electronic devices, n (%)b |
|
|
23.156 (1) | <.001 |
|
|
|
|
Yes | 334 (83.1) | 115 (65.0) |
|
|
|
| No | 68 (16.9) | 62 (35.0) | ||||
aA 2-sample rank test was used because the data did not conform to a normal distribution. Median values (25th percentile-75th percentile) instead of mean values were used to describe results.
bThe cutoff for yes/no was the average time of using an electronic device (eg, smartphone) for 1 hour or more/day.