Table 1 Population characteristics
Characteristics | Total (n = 6434) | Without cognitive decline (n = 2530) | Cognitive decline (n = 3904) | P-value |
|---|---|---|---|---|
Age, years | 58.89 ± 8.64 | 59.37 ± 8.81 | 58.14 ± 8.31 | < 0.001 |
Sex |  |  |  | < 0.001 |
 Female | 3404(52.91) | 1405(55.53) | 1999(51.20) |  |
 Male | 3030(47.09) | 1125(44.47) | 1905(48.80) |  |
Birthplace |  |  |  | < 0.001 |
 Rural | 4356(67.70) | 1633(64.55) | 2723(69.75) |  |
 Urban | 2078(32.30) | 897(35.45) | 1181(30.25) |  |
Education level | Â | Â | Â | 0.002 |
 Junior high school and below | 4646(72.21) | 1881(74.35) | 2765(70.82) |  |
 High school and above | 1788(27.79) | 649(25.65) | 1139(29.18) |  |
Sleep time per day, hours | 6.00(5.00,8.00) | 6.00(5.00,8.00) | 6.00(5.00,8.00) | 0.599 |
Smoking | 2526(39.26) | 912(36.05) | 1614(41.34) | < 0.001 |
Cooking fuel use | Â | Â | Â | 0.003 |
 Clean fuel | 2557(39.74) | 1063(42.02) | 1494(38.27) |  |
 Solid fuel | 3877(60.26) | 1467(57.98) | 2410(61.73) |  |
Heating fuel use |  |  |  | < 0.001 |
 Clean fuel | 2613(40.61) | 1109(43.83) | 1504(38.52) |  |
 Solid fuel | 3821(59.39) | 1421(56.17) | 2400(61.48) |  |
Brain injury | 147(2.28) | 60(2.37) | 87(2.23) | 0.709 |
Hearing lossa | 495(7.69) | 181(7.16) | 314(8.05) | 0.194 |
Alcohol consumption | Â | Â | Â | 0.814 |
 > 1 time/month | 4322(67.17) | 1710(67.59) | 2612(66.91) |  |
 < 1 time/month | 495(7.69) | 195(7.71) | 300(7.68) |  |
 Never | 1617(25.13) | 625(24.70) | 992(25.41) |  |
Physical Activitya | Â | Â | Â | 0.828 |
 0 | 278(4.32) | 119(8.94) | 159(8.87) |  |
 1 | 645(10.02) | 265(19.91) | 380(21.21) |  |
 2 | 933(14.50) | 398(29.90) | 535(29.85) |  |
 3 | 1267(19.69) | 549(41.25) | 718(40.07) |  |
Number of chronic diseases | Â | Â | Â | 0.244 |
 0 | 2000 (31.10) | 752(29.72) | 1248(31.97) |  |
 1 | 1955 (30.40) | 773(30.55) | 1182(30.28) |  |
 2 | 1297 (20.20) | 522(20.63) | 775(19.85) |  |
 ≥ 3 | 1182 (18.40) | 483(19.09) | 699(17.90) |  |
Regional Per Capita GDP(CNY) | 35711.00(29608.00 , 52763.00) | 33480.00(29608.00 , 51768.00) | 33480.00(29608.00 , 51768.00) | 0.160 |