Characteristics | Urban (n = 195) | Rural (n = 597) | p- value | Western (n = 162) | Central (n = 242) | Eastern (n = 388) | p - value | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
n | % | mean (SD) | n | % | mean (SD) | Â | n | % | mean (SD) | n | % | mean (SD) | n | % | Mean (SD) | ||
Gender | Â | Â | NA | Â | Â | NA | 0.00 | Â | Â | NA | Â | Â | NA | Â | Â | NA | 0.35 |
 Male | 116 | 59.49 |  | 423 | 70.85 |  |  | 110 | 67.90 |  | 173 | 71.49 |  | 256 | 65.98 |  |  |
 Female | 79 | 40.51 |  | 174 | 29.15 |  |  | 52 | 32.10 |  | 69 | 28.51 |  | 132 | 34.02 |  |  |
Age | Â | Â | 64.75 (14.42) | Â | Â | 64.01 (12.78) | 0.49 | Â | Â | 61.15 (12.86) | Â | Â | 64.29 (13.35) | Â | Â | 65.42 (13.06) | 0.01 |
 Age < 45 | 15 | 7.69 |  | 44 | 7.37 |  |  | 20 | 12.35 |  | 18 | 7.44 |  | 21 | 5.41 |  |  |
 Age 45–54 | 37 | 18.97 |  | 77 | 12.90 |  |  | 28 | 17.28 |  | 33 | 13.64 |  | 53 | 13.66 |  |  |
 Age 55–64 | 40 | 20.51 |  | 174 | 29.15 |  |  | 53 | 32.72 |  | 65 | 26.86 |  | 96 | 24.74 |  |  |
 Age 65–74 | 48 | 24.62 |  | 169 | 28.31 |  |  | 36 | 22.22 |  | 71 | 29.34 |  | 110 | 28.35 |  |  |
 Age 75- | 55 | 28.21 |  | 133 | 22.28 |  |  | 25 | 15.43 |  | 55 | 22.70 |  | 108 | 27.84 |  |  |
Marriages | Â | Â | NA | Â | Â | NA | 0.08 | Â | Â | NA | Â | Â | NA | Â | Â | NA | 0.02 |
 Married | 156 | 80 |  | 501 | 83.92 |  |  | 144 | 88.89 |  | 204 | 84.30 |  | 309 | 79.64 |  |  |
 Other (unmarried/widowed/divorced) | 39 | 20 |  | 96 | 16.08 |  |  | 18 | 11.11 |  | 38 | 15.70 |  | 79 | 20.36 |  |  |
Nation | Â | Â | NA | Â | Â | NA | 0.22 | Â | Â | NA | Â | Â | NA | Â | Â | NA | Â |
 Han | 188 | 96.41 |  | 562 | 94.14 |  |  | 125 | 77.16 |  | 240 | 99.17 |  | 385 | 99.20 |  | 0.00 |
 Minority | 7 | 3.59 |  | 35 | 5.86 |  |  | 37 | 22.84 |  | 2 | 0.83 |  | 3 | 0.77 |  |  |
Residence | Â | Â | NA | Â | Â | NA | NA | Â | Â | NA | Â | Â | NA | Â | Â | NA | 0.00 |
 Urban | NA | NA |  | NA | NA |  |  | 47 | 29.01 |  | 28 | 11.57 |  | 120 | 30.93 |  |  |
 Rural | NA | NA |  | NA | NA |  |  | 115 | 70.99 |  | 214 | 88.43 |  | 268 | 69.07 |  |  |
Occupation | Â | Â | NA | Â | Â | NA | 0.00 | Â | Â | NA | Â | Â | NA | Â | Â | NA | 0.00 |
 Farmer | 37 | 18.97 |  | 476 | 79.73 |  |  | 106 | 65.43 |  | 178 | 73.55 |  | 229 | 59.02 |  |  |
 Steady workers | 27 | 13.85 |  | 42 | 7.04 |  |  | 12 | 7.41 |  | 21 | 8.68 |  | 36 | 9.28 |  |  |
 Non-regular workers | 55 | 28.21 |  | 55 | 9.21 |  |  | 19 | 11.73 |  | 28 | 11.57 |  | 63 | 16.24 |  |  |
 The retired | 76 | 38.97 |  | 24 | 4.02 |  |  | 25 | 15.43 |  | 15 | 6.20 |  | 60 | 15.46 |  |  |
Annual per-capita income ($)a | Â | Â | 28.05 (31.29) | Â | Â | 10.78 (14.06) | 0.00 | Â | Â | 16.91 (17.50) | Â | Â | 8.90 (17.13) | Â | Â | 18.07 (23.67) | 0.00 |
 Low income level (≤ $421) | 14 | 7.18 |  | 165 | 27.64 |  |  | 15 | 9.26 |  | 83 | 34.30 |  | 81 | 20.88 |  |  |
 Below average level($422–$1505) | 42 | 21.54 |  | 283 | 47.40 |  |  | 76 | 46.91 |  | 117 | 48.35 |  | 132 | 34.02 |  |  |
 Average level ($1506–$4015) | 61 | 31.28 |  | 80 | 13.40 |  |  | 40 | 24.69 |  | 24 | 9.92 |  | 77 | 19.85 |  |  |
 Above average level (≥$4016) | 78 | 40.00 |  | 69 | 11.56 |  |  | 31 | 19.14 |  | 18 | 7.43 |  | 98 | 25.26 |  |  |
The nearest medical institutions | Â | Â | NA | Â | Â | NA | 0.00 | Â | Â | NA | Â | Â | NA | Â | Â | NA | 0.00 |
 Village clinics | 1 | 0.51 |  | 283 | 47.40 |  |  | 58 | 35.80 |  | 67 | 27.69 |  | 159 | 40.98 |  |  |
 Town health center | 5 | 2.56 |  | 113 | 18.93 |  |  | 11 | 6.79 |  | 67 | 27.69 |  | 40 | 10.31 |  |  |
 County hospital | 53 | 27.18 |  | 120 | 20.10 |  |  | 55 | 33.95 |  | 33 | 13.64 |  | 85 | 21.91 |  |  |
 Municipal level or above hospitals | 110 | 56.41 |  | 5 | 0.84 |  |  | 28 | 17.28 |  | 14 | 5.79 |  | 73 | 18.81 |  |  |
 Private clinic | 1 | 0.51 |  | 57 | 9.55 |  |  | 0 | 0.00 |  | 56 | 23.14 |  | 2 | 0.52 |  |  |
 Other | 25 | 12.82 |  | 19 | 3.18 |  |  | 0 | 0.00 |  | 5 | 2.07 |  | 0 | 0.00 |  |  |
Distance to the nearest medical institutions | Â | Â | 2.77 (2.58) | Â | Â | 2.70 (4.19) | 0.83 | Â | Â | 3.62 (5.86) | Â | Â | 3.10 (3.77) | Â | Â | 2.11 (2.50) | 0.00 |
 < 1 km | 29 | 14.87 |  | 195 | 32.66 |  |  | 37 | 22.84 |  | 44 | 18.18 |  | 143 | 36.86 |  |  |
 1-5 km | 137 | 70.26 |  | 301 | 50.42 |  |  | 93 | 57.41 |  | 146 | 60.33 |  | 199 | 51.29 |  |  |
 >5 km | 29 | 14.87 |  | 100 | 16.92 |  |  | 32 | 19.75 |  | 52 | 21.49 |  | 46 | 11.85 |  |  |