Vietnam, Thanh Hoa (2011)

Viet Nam, 2011
Thanh Hoa
Principal Investigator
Robert Finger
Trainer
Anna-Lena Arnold
Sample size
5000
Response rate
97.5%
RAAB version
RAAB5
Diabetic retinopathy
No
Disability module
No

Survey comparison

Vision impairment

Prevalence (age-sex adjusted)

Female
Male
Total
Extrapolated magnitude
%
95% CI
Extrapolated magnitude
%
95% CI
Extrapolated magnitude
%
95% CI
Blind
19218
6.6
5.3 - 8.0
8712
3.8
2.8 - 4.8
27930
5.4
4.4 - 6.5
Severe
13109
4.5
3.6 - 5.5
4831
2.1
1.4 - 2.9
17940
3.5
2.7 - 4.2
Moderate
38092
13.2
11.5 - 14.8
24864
11.0
9.2 - 12.7
62956
12.2
10.8 - 13.6

Cataract

Cataract surgical coverage (CSC) (age-sex adjusted)

Female
Male
Total
%
95% CI
%
95% CI
%
95% CI
<3/60
-
39.1
31.0 - 47.1
-
36.5
25.2 - 25.2
-
38.4
31.0 - 45.7
<6/60
-
29.2
23.2 - 35.2
-
27.5
18.5 - 36.6
-
28.7
23.1 - 34.4
<6/18
-
18.8
14.8 - 22.8
-
16.0
10.9 - 21.1
-
17.9
14.4 - 21.5

Unmet need for cataract surgery: magnitude & prevalence (age-sex adjusted)

Female
Male
Total
Extrapolated magnitude
%
95% CI
Extrapolated magnitude
%
95% CI
Extrapolated magnitude
%
95% CI
<3/60
12699
4.4
3.3 - 5.5
5188
2.3
1.5 - 3.1
17887
3.5
2.6 - 4.3
<6/60
21490
7.4
5.9 - 9.0
8119
3.6
2.5 - 4.7
29609
5.7
4.5 - 7.0
<6/18
42298
14.6
12.4 - 16.8
19365
8.6
6.7 - 10.4
61664
12.0
10.1 - 13.8

Notes

Vision impairment categories defined according to WHO thresholds using presenting visual acuity in the better eye.

All prevalence and coverage estimates are adjusted to the age and gender distribution of the population 50 years and older in the survey area.

All 95% confidence intervals adjusted to account for the cluster design of the survey.

Effective cataract surgical coverage (eCSC) and cataract surgical coverage (CSC) are calculated according to the 2022 definition; eCSC is only reported where 6/12 data available.

Refractive error results, including effective refractive error coverage (eREC), only reported where 6/12 data available. RAAB6 surveys measured presenting visual acuity (not uncorrected visual acuity) so the alternative calculation for eREC is used.