Table 4.
Relationship between cognitive impairment and risk factors
| Variable | β | SE | Wald | P | OR | 95% CI |
|---|---|---|---|---|---|---|
| Age* | 0.057 | 0.007 | 63.764 | < 0.001 | 1.059 | 1.044–1.074 |
| Educational level* | ||||||
| Illiteracy | Reference | |||||
| Primary school | –0.856 | 0.263 | 10.614 | 0.0011 | 0.425 | 0.254–0.711 |
| Junior high school | –1.886 | 0.235 | 64.317 | < 0.001 | 0.152 | 0.096–0.241 |
| High school | –2.863 | 0.302 | 89.747 | < 0.001 | 0.057 | 0.032–0.103 |
| University and above | –3.531 | 0.386 | 83.616 | < 0.001 | 0.029 | 0.014–0.062 |
| Arterial hypertension* | 0.51 | 0.192 | 7.052 | 0.008 | 1.665 | 1.143–2.427 |
| Passive smoking* | 0.089 | 0.192 | 0.212 | 0.645 | 1.093 | 0.750–1.593 |
| Alcohol consumption* | ||||||
| Never | Reference | |||||
| Less than two standard drinks | –0.513 | 0.187 | 7.525 | 0.006 | 0.599 | 0.415–0.864 |
| Equal or more than two standard drinks | 0.505 | 0.276 | 3.33 | 0.068 | 1.656 | 0.963–2.847 |
| Drinking, but not quantities | 0.099 | 0.459 | 0.047 | 0.828 | 1.105 | 0.449–2.717 |
*: Screening out meaningful single-factor indicators (P < 0.05). SE: Standard error; Wald: chi-square value; OR: odds ratio; CI: confidence interval.