Table 1.
Characteristics of participants at T1 (N = 2,228)
| Characteristics | Mean (SD)/n(%)a | Min | Max |
|---|---|---|---|
| Global cognition | −0.37 (0.95) | −3.12 | 1.63 |
| Perceptual speed | −0.42 (1.03) | −2.36 | 3.16 |
| Episodic memory | −0.36 (1.09) | −2.85 | 1.29 |
| Working memory | −0.20 (0.95) | −2.15 | 2.94 |
| C_MMSE | −0.50 (1.37) | −5.72 | 1.02 |
| Overall sleep quality - PSQI | 4.13 (3.05) | 0 | 12 |
| Subjective sleep quality | 1 | 4 | |
| Very good | 226 (11.94) | ||
| Fairly good | 1,101 (49.42) | ||
| Fairly bad | 673 (30.21) | ||
| Very bad | 188 (8.44) | ||
| Sleep latency | 1 | 4 | |
| <=15 mins | 875 (39.27) | ||
| <15 to =< 30 mins | 691 (31.01) | ||
| >30 to =<60 mins | 405 (18.18) | ||
| >60 mins | 257 (11.54) | ||
| Sleep efficiency | 1 | 4 | |
| >=85% | 1,347 (60.76) | ||
| >=75% to <85% | 346 (15.61) | ||
| >=65% to <75% | 212 (9.56) | ||
| <65% | 312 (14.07) | ||
| Sleep duration | 1 | 4 | |
| >=7h | 1,058 (47.64) | ||
| < 7 to >= 6h | 489 (22.02) | ||
| <6 to >=5h | 354 (15.94) | ||
| <5h | 320 (14.41) | ||
| Insomnia | 5.50 (4.24) | 0 | 16 |
| Daytime sleepiness | 1 | 5 | |
| Never | 1,064 (47.78) | ||
| Rarely | 299 (13.43) | ||
| Sometimes | 468 (21.01) | ||
| Often | 253 (11.36) | ||
| Almost always | 143 (6.42) | ||
| Age | 77.42 (7.57) | 65 | 103 |
| Female | 1,331 (59.74) | 0 | 1 |
| Married status | 1,437 (64.50) | 0 | 1 |
| Education | 8.84 (5.00) | 0 | 26 |
| Income | 2.03 (1.08) | 1 | 10 |
| Years living in the US | 24.54 (12.01) | 5.71 | 95.67 |
| Acculturation | 14.57 (3.83) | 12 | 54 |
| Alcohol use | 0.02 (0.07) | 0 | 1.02 |
| Physical activity | 5.95 (5.60) | 0 | 20 |
| BMIa | |||
| Normal | 1,585 (71.36) | 1 | 3 |
| Overweight | 553 (24.90) | ||
| Obese | 83 (3.74) | ||
| Depression | 1.50 (2.78) | 0 | 22 |
| IADL | 6.42 (7.85) | 0 | 36 |
Note.
a
Frequencies and percentages were reported for categorical variables.