Table 4.
Multivariate logistic regression analysis of factors associated with long sleep duration
| Factors | β | χ 2 | P | OR | 95% CI | ||||
|---|---|---|---|---|---|---|---|---|---|
| Sex | |||||||||
| Male | −0. | 176 | 3. | 595 | 0. | 058 | 0. | 839 | (0.700, 1.006) |
| Female | 0 | 1 | |||||||
| Age | |||||||||
| Young | 0 | 5. | 853 | 0. | 054 | 1 | |||
| Middle age | −0. | 216 | 5. | 595 | 0. | 018 | 0. | 806 | (0.674, 0.964) |
| Elderly | −0. | 127 | 1. | 081 | 0. | 299 | 0. | 881 | (0.694, 1.119) |
| Ethnicity | |||||||||
| Han | 0. | 272 | 3. | 177 | 0. | 075 | 1. | 312 | (0.973, 1.769) |
| Others | 0 | 1 | |||||||
| Place of residence | |||||||||
| Urbanite | 0. | 326 | 9. | 952 | 0. | 002 | 1. | 386 | (1.131, 1.697) |
| Countryside | 0 | 1 | |||||||
| Occupation | |||||||||
| Mental worker | 0 | 13. | 321 | 0. | 001 | 1 | |||
| Manual worker | 0. | 160 | 1. | 264 | 0. | 261 | 1. | 174 | (0.888, 1.552) |
| Others | 0. | 538 | 10. | 017 | 0. | 002 | 1. | 713 | (1.227, 2.392) |
| Educational level | |||||||||
| Primary school or below | 0 | 12. | 837 | 0. | 005 | 1 | |||
| Junior middle school | −0. | 190 | 3. | 230 | 0. | 072 | 0. | 827 | (0.672, 1.017) |
| Senior middle school | −0. | 443 | 11. | 895 | 0. | 001 | 0. | 642 | (0.499, 0.826) |
| Undergraduate or above | −0. | 450 | 6. | 741 | 0. | 009 | 0. | 607 | (0.416, 0.885) |
| Average monthly earnings (¥) | |||||||||
| < 500 | 0 | 5. | 201 | 0. | 074 | 1 | |||
| 500- | −0. | 223 | 5. | 093 | 0. | 024 | 0. | 800 | (0.658, 0.971) |
| 3000- | −0. | 153 | 0. | 583 | 0. | 445 | 0. | 858 | (0.579, 1.271) |
| Physical exercise | |||||||||
| Never | 0 | 11. | 150 | 0. | 004 | 1 | |||
| Sometimes | −0. | 025 | 0. | 051 | 0. | 821 | 0. | 975 | (0.782, 1.215) |
| Often | −0. | 300 | 9. | 991 | 0. | 002 | 0. | 741 | (0.616, 0.893) |
| BMI | |||||||||
| Normal | 0 | 8. | 822 | 0. | 032 | 1 | |||
| Underweight | 0. | 129 | 0. | 358 | 0. | 550 | 1. | 138 | (0.745, 1.737) |
| Overweight | −0. | 234 | 6. | 927 | 0. | 008 | 0. | 791 | (0.664, 0.942) |
| Obesity | −0. | 034 | 0. | 098 | 0. | 754 | 0. | 967 | (0.781, 1.196) |
1:the reference cell