Table 3

Visual impairment in NDNS subjects according to WHO and USA criteria in different age, domicile, and sex groups

WHO low vision (<6/18) or blindness
All
No
n 65–74 years No n 75–84 years No n 85+ years No n p Value
All subjects1362195  (14.3%)50816  (3.1%)519 60 (11.6%)335119 (35.5%)<0.01
Community1126111 (9.9%)47512 (2.5%)429 33 (7.7%)222 66 (29.7%)<0.01
Institution 236 84 (35.6%) 33 4 (12.1%) 90 27 (30.0%)113 53 (46.9%)<0.01
WHO low vision (<6/18) or blindness
All
No
n 65–74 years No n 75–84 years No n 85+ years No n p Value
Men 690 72 (10.4%)272 5 (1.8%)283 28 (9.9%)135 39 (28.9%)<0.01
Women 672123 (18.3%)23611 (4.7%)236 32 (13.6%)200 80 (40.0%)<0.01
USA visual impairment (<6/12) or blindness
All
No
n 65–74 years No n 75–84 years No n 85+ years No n p Value
All subjects1362386 (28.3%)50850 (9.8%)519134 (25.8%)335202 (60.3%)<0.01
Community1126252 (22.4%)47541 (8.6%)429 87 (20.3%)222124 (55.9%)<0.01
Institution 236134 (56.8%) 33 9 (27.3%) 90 47 (52.2%)113 78 (69.0%)<0.01
  • Total number of subjects measured in that group.

  • Number of subjects in that group who were visually impaired.

  • Mantel-Haenzel test for linear association.