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Table 1 Subjects by ethnic group, and examination status, by age and gender

From: Prevalence and causes of blindness, visual impairment among different ethnical minority groups in Xinjiang Uygur autonomous region, China

Ethnicity Population in study areas People selected People examined Not available Refused Unable Total examined
  n % n % n % n % n % n % n %
Han 641,783 (46.2) 1775 42.8 1712 (96.5) 45 (2.5) 8 (0.5) 10 (0.6) 1712 100
Kazak 551,318 (39.7) 1837 (44.3)* 1747 (95.1) 80 (4.4)** 6 (0.3) 4 (0.2) 1747 100
Yugur 51,467 (3.7) 108 (2.6) 105 (97.2) 3 (2.8) 0 0.0 0 0.0 105 100
Other 145,862 (10.5) 430 (10.4) 413 (96.1) 11 (2.6) 2 (0.5) 4 (I0.9) 413 100
Total 1,390,430 (100) 4150 (100) 3977 (95.8) 139 (3.4) 16 (0.4) 18 (0.4) 3977 100
  Male Female Total   
Age Population in study areas People Examined Population in study areas People Examined Population in study areas People Examined   
  n % n % n % n % n % n %   
50–59 years 11,771 45.4 727 40.2 11,730 44.1 905 41.7 23,501 44.8 1632 41.0   
60–69 years 8495 32.8 585 32.3 8822 33.2 749 34.5 17,317 33.0 1334 33.5   
70–79 years 4675 18.0 381 21.1 5020 18.9 387 17.9 9695 18.5 768 19.3   
80+ years 985 3.8 116 6.4 1012 3.8 127 5.9 1997 3.8 243 6.1   
Total 25,926 100 1809 100 26,584 100 2168 100 52,510 100 3977 100   
  1. *It seemed we selected less Han Chinese and more Khazak compared their proportion of total population in study areas (p < 0.5)
  2. **p < 0.01 Khazak people had highest rate of “not available” as they were mostly nomadic