Factors associated with the knowledge that sleep disturbances increase the risk of dementia
| Factors | AOR | 95% CI | P value |
| Sex | <0.001 | ||
| Men | 1 | ||
| Women | 1.47* | 1.24 to 1.75 | |
| Age (years) | <0.001 | ||
| <40 | 1 | ||
| 40–65 | 0.46* | 0.39 to 0.56 | |
| ≥ 65 | 0.35* | 0.22 to 0.56 | |
| Education level (years) | <0.001 | ||
| Primary school or illiteracy (≤6) | 1 | ||
| Middle or high school (6–12) | 1.33 | 0.75 to 2.35 | |
| College or university (12–16) | 1.92* | 1.07 to 3.46 | |
| Postgraduate (≥16) | 2.45* | 1.32 to 4.53 | |
| Type of job | <0.001 | ||
| Nonmanual | 1 | ||
| Manual | 0.86 | 0.65 to 1.13 | |
| Retired | 0.55* | 0.41 to 0.74 | |
| Income groups (yuan/month) | 0.858 | ||
| 0–2000 | 1 | ||
| 2000–5000 | 0.95 | 0.71 to 1.27 | |
| 5000–10 000 | 0.99 | 0.74 to 1.33 | |
| >10 000 | 0.90 | 0.65 to 1.25 | |
| Type of residence | 0.348 | ||
| City | 1 | ||
| Town | 0.83 | 0.62 to 1.09 | |
| Rural area | 0.86 | 0.58 to 1.26 | |
| Dementia contact | <0.001 | ||
| Yes | 1 | ||
| No | 0.65* | 0.54 to 0.78 | |
| Unclear | 0.83 | 0.65 to 1.06 | |
| Shift work | <0.001 | ||
| Yes | 1 | ||
| No | 0.57* | 0.46 to 0.71 | |
| Sleep duration in the past 1 month (hours) | 0.082 | ||
| 6–8 | 1 | ||
| <6 | 1.07 | 0.88 to 1.30 | |
| >8 | 0.71* | 0.51 to 0.99 | |
| Self-reported sleep quality in the past 1 month | 0.999 | ||
| Very good/pretty good | 1 | ||
| Very bad/pretty bad | 1.00 | 0.83 to 1.20 | |
| Self-reported diagnosis of sleep disturbances, neurological or psychiatric disorders | 0.005 | ||
| At least one | 1 | ||
| None | 0.76* | 0.62 to 0.92 |
* indicates statistically significant.
AOR, adjusted odds ratio; CI, confidence interval.