Tanzania, Morogoro (2016)

Tanzania, 2016
Morogoro
Principal Investigator
George Kabona
Trainer
Amir Berdi
Sample size
3000
Response rate
96.1%
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
3 787
3.0
2.1 - 3.8
2 913
2.3
1.4 - 3.3
6 699
2.7
2.0 - 3.3
Severe
3 372
2.7
1.7 - 3.6
3 794
3.1
1.8 - 4.3
7 166
2.9
2.0 - 3.7
Moderate
12 493
9.8
7.6 - 12.0
15 021
12.1
9.9 - 14.4
27 514
11.0
9.2 - 12.8
Mild
13 312
10.5
8.8 - 12.1
11 911
9.6
7.8 - 11.4
25 223
10.0
8.8 - 11.3

Cataract

Operable cataract prevalence (age-sex adjusted)

Female
Male
Total
Extrapolated magnitude
%
95% CI
Extrapolated magnitude
%
95% CI
Extrapolated magnitude
%
95% CI
<3/60
1 838
1.4
0.8 - 2.1
1 009
0.8
0.3 - 1.4
2 847
1.1
0.7 - 1.6
<6/60
3 616
2.8
1.8 - 3.9
2 027
1.6
0.8 - 2.5
5 642
2.2
1.5 - 3.0
<6/18
9 181
7.2
5.6 - 8.9
7 740
6.2
4.2 - 8.3
16 921
6.7
5.2 - 8.3
<6/12
14 451
11.4
9.2 - 13.6
12 549
10.1
7.5 - 12.8
27 001
10.8
8.7 - 12.8

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

Female
Male
Total
%
95% CI
%
95% CI
%
95% CI
CSC<3/60
-
46.9
29.2 - 64.6
-
66.1
47.6 - 47.6
-
55.8
32.7 - 61.1
CSC<6/60
-
31.0
16.5 - 45.4
-
50.4
31.9 - 68.9
-
39.5
18.6 - 43.4
CSC<6/18
-
16.4
9.0 - 23.7
-
23.2
13.0 - 33.4
-
19.6
9.9 - 22.8
CSC<6/12
-
12.5
7.4 - 17.6
-
17.8
10.5 - 25.2
-
15.0
7.9 - 17.0

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
235
0.2
0.0 - 0.5
223
0.2
0.0 - 0.4
458
0.2
0.0 - 0.4
Moderate
2 880
2.3
1.2 - 3.3
4 629
3.7
2.8 - 4.7
7 508
3.0
2.2 - 3.7
Mild
10 318
8.1
6.6 - 9.6
9 669
7.8
6.3 - 9.3
19 987
8.0
6.8 - 9.1

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.