Vietnam, Quang Tri (2015)

Viet Nam, 2015
Quang Tri
Principal Investigator
Quynh Nga Pham
Trainer
Hans Limburg
Sample size
1998
Response rate
100%
RAAB version
RAAB6
Diabetic retinopathy
No
Disability module
No

Vision impairment

Prevalence (age-sex adjusted)

Female
Male
Total
Extrapolated magnitude
%
95% CI
Extrapolated magnitude
%
95% CI
Extrapolated magnitude
%
95% CI
Blind
1 922
2.7
1.3 - 4.1
857
1.5
0.5 - 2.5
2 779
2.2
1.2 - 3.2
Severe
1 903
2.7
1.5 - 3.9
1 030
1.8
0.6 - 3.0
2 933
2.3
1.4 - 3.1
Moderate
8 303
11.7
9.1 - 14.2
5 710
9.9
7.3 - 12.5
14 014
10.9
8.9 - 12.8
Mild
10 045
14.1
11.2 - 17.0
8 011
13.9
10.2 - 17.5
18 056
14.0
11.3 - 16.7

Cataract

Operable cataract prevalence (age-sex adjusted)

Female
Male
Total
Extrapolated magnitude
%
95% CI
Extrapolated magnitude
%
95% CI
Extrapolated magnitude
%
95% CI
<3/60
1 337
1.9
0.7 - 3.1
255
0.4
0.0 - 1.1
1 592
1.2
0.4 - 2.1
<6/60
2 128
3.0
1.4 - 4.6
829
1.4
0.4 - 2.5
2 958
2.3
1.1 - 3.5
<6/18
6 655
9.4
6.5 - 12.2
3 162
5.5
3.5 - 7.5
9 817
7.6
5.5 - 9.8
<6/12
13 243
18.6
14.9 - 22.4
7 846
13.6
9.9 - 17.3
21 089
16.4
13.2 - 19.6

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

Female
Male
Total
%
95% CI
%
95% CI
%
95% CI
CSC<3/60
-
71.3
60.0 - 82.6
-
79.0
66.7 - 66.7
-
72.9
60.5 - 82.1
CSC<6/60
-
62.1
51.2 - 73.1
-
54.8
42.2 - 67.5
-
60.3
52.2 - 72.1
CSC<6/18
-
35.3
27.9 - 42.6
-
26.1
18.3 - 33.9
-
32.6
28.6 - 42.0
CSC<6/12
-
24.1
18.8 - 29.4
-
15.0
9.9 - 20.1
-
21.0
19.4 - 28.8

Effective cataract surgical coverage (eCSC) (age-sex adjusted)

The RAAB research team are in the process of concluding a formal analysis of eCSC with the World Health Organization and the Vision Loss Expert Group. eCSC results will be available on the repository in 2022.

Refractive error

Vision impairing refractive error is defined as presenting VA less than 6/12 improving to 6/12 with pinhole. Use of presenting VA accounts for the prevalence of uncorrected or undercorrected refractive error only.

Vision impairing refractive error prevalence (age-sex adjusted)

Female
Male
Total
Extrapolated magnitude
%
95% CI
Extrapolated magnitude
%
95% CI
Extrapolated magnitude
%
95% CI
Blind
0
0.0
0.0 - 0.0
0
0.0
0.0 - 0.0
0
0.0
0.0 - 0.0
Severe
0
0.0
0.0 - 0.0
0
0.0
0.0 - 0.0
0
0.0
0.0 - 0.0
Moderate
1 350
1.9
0.9 - 2.9
912
1.6
0.5 - 2.7
2 262
1.8
0.9 - 2.6
Mild
4 833
6.8
5.2 - 8.4
4 152
7.2
4.7 - 9.7
8 985
7.0
5.5 - 8.5

Effective refractive error coverage (eREC) (age-sex adjusted)

The RAAB research team are in the process of concluding a formal analysis of eREC with the World Health Organization and the Vision Loss Expert Group. eREC results will be available on the repository in 2022.

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.