Table 1.
Characteristics of Chinese Adults 80 Years of Age or Older in Seven Wave Survey in CLHLS
| Characteristic | 1998 | 2000 | 2002 | 2005 | 2008 | 2011 | 2014 | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (n = 8,938) | (n = 11,123) | (n = 11,128) | (n = 10,620) | (n = 12,238) | (n = 6,503) | (n = 3,848) | ||||||||
| Mean age, y | 92.25 | 91.27 | 92.57 | 92.76 | 92.82 | 92.13 | 90.87 | |||||||
| Genders | ||||||||||||||
| Male | 3,563 | 39.9% | 4,624 | 41.6% | 4,389 | 39.4% | 4,183 | 39.4% | 4,726 | 38.6% | 2,628 | 40.4% | 1,656 | 43.0% |
| Female | 5,375 | 60.1% | 6,499 | 58.4% | 6,739 | 60.6% | 6,437 | 60.6% | 7,512 | 61.4% | 3,875 | 59.6% | 2,192 | 57.0% |
| Age, y | ||||||||||||||
| 80–82 | 1,179 | 13.2% | 1,602 | 14.4% | 1,192 | 10.7% | 828 | 7.8% | 1,243 | 10.2% | 695 | 10.7% | 570 | 14.8% |
| 83–85 | 1,092 | 12.2% | 1,556 | 14.0% | 1,390 | 12.5% | 1,102 | 10.4% | 1,173 | 9.6% | 905 | 13.9% | 541 | 14.1% |
| 86–88 | 946 | 10.6% | 1,341 | 12.1% | 1,271 | 11.4% | 1,523 | 14.3% | 1,326 | 10.8% | 797 | 12.3% | 615 | 16.0% |
| 89–91 | 1,023 | 11.4% | 1,567 | 14.1% | 1,280 | 11.5% | 1,588 | 15.0% | 1,917 | 15.7% | 806 | 12.4% | 505 | 13.1% |
| 92–94 | 915 | 10.2% | 1,271 | 11.4% | 1,432 | 12.9% | 1,312 | 12.4% | 1,653 | 13.5% | 905 | 13.9% | 409 | 10.6% |
| 95–97 | 806 | 9.0% | 851 | 7.7% | 928 | 8.3% | 1,037 | 9.8% | 1,069 | 8.7% | 708 | 10.9% | 422 | 11.0% |
| 98–100 | 1,494 | 16.7% | 1,230 | 11.1% | 1,391 | 12.5% | 1,185 | 11.2% | 1,356 | 11.1% | 485 | 7.5% | 250 | 6.5% |
| 101–103 | 1,153 | 12.9% | 1,261 | 11.3% | 1,648 | 14.8% | 1,354 | 12.7% | 1,677 | 13.7% | 618 | 9.5% | 231 | 6.0% |
| 104–106 | 252 | 2.8% | 360 | 3.2% | 500 | 4.5% | 571 | 5.4% | 661 | 5.4% | 439 | 6.8% | 183 | 4.8% |
| 107–109 | 78 | 0.9% | 84 | 0.8% | 96 | 0.9% | 120 | 1.1% | 163 | 1.3% | 145 | 2.2% | 122 | 3.2% |
| Residence | ||||||||||||||
| Urban | 3,373 | 37.7% | 5,808 | 52.2% | 4,981 | 44.8% | 4,663 | 43.9% | 4,716 | 38.5% | 2,178 | 33.5% | 1,231 | 32.0% |
| Rural | 5,565 | 62.3% | 5,315 | 47.8% | 6,147 | 55.2% | 5,957 | 56.1% | 7,522 | 61.5% | 4,325 | 66.5% | 2,617 | 68.0% |
| Education | ||||||||||||||
| Illiteracy | 6,036 | 67.5% | 7,167 | 64.4% | 7,567 | 68.0% | 7,360 | 69.3% | 8,760 | 71.6% | 4,450 | 68.4% | 2,472 | 64.2% |
| Literacy | 2,902 | 32.5% | 3,956 | 35.6% | 3,561 | 32.0% | 3,260 | 30.7% | 3,478 | 28.4% | 2,053 | 31.6% | 1,376 | 35.8% |
| Activities of daily living | ||||||||||||||
| Normal | 6,781 | 75.9% | 8,773 | 78.9% | 8,411 | 75.6% | 8,406 | 79.2% | 9,934 | 81.2% | 4,983 | 76.6% | 2,995 | 77.8% |
| Impairment | 2,119 | 23.7% | 2,317 | 20.8% | 2,669 | 24.0% | 2,210 | 20.8% | 2,303 | 18.8% | 1,515 | 23.3% | 845 | 22.0% |
| Missing | 38 | 0.4% | 33 | 0.3% | 48 | 0.4% | 4 | <0.1% | 1 | <0.1% | 5 | <0.1% | 8 | 0.2% |
| Physical performance | ||||||||||||||
| Normal | 6,363 | 71.2% | 7,691 | 69.1% | 6,885 | 61.9% | 6,530 | 61.5% | 6,826 | 55.8% | 3,945 | 60.7% | 2,350 | 61.1% |
| Impairment | 2,446 | 27.4% | 3,362 | 30.2% | 4,164 | 37.4% | 4,060 | 38.2% | 5,405 | 44.2% | 2,539 | 39.0% | 1,485 | 38.6% |
| Missing | 129 | 1.4% | 70 | 0.6% | 79 | 0.7% | 30 | 0.3% | 7 | <0.1% | 19 | 0.3% | 13 | 0.3% |
| Cognitive function | ||||||||||||||
| Normal | 4,737 | 53.0% | 6,395 | 57.5% | 5,236 | 47.1% | 5,244 | 49.4% | 5,374 | 43.9% | 3,145 | 48.4% | 2,006 | 52.1% |
| Impairment | 4,105 | 45.9% | 4,684 | 42.1% | 5,884 | 52.9% | 5,376 | 50.6% | 6,864 | 56.1% | 3,322 | 51.1% | 1,839 | 47.8% |
| Missing | 96 | 1.1% | 44 | 0.4% | 8 | <0.1% | 0 | 0 | 0 | 0 | 36 | 0.6% | 3 | <0.1% |
Notes: Data are years, cases or proportion %. Activities of daily living (ADL) measured by six questions, physical performance measured by three tests and cognitive function measured by Mini-Mental State Examination (MMSE).