Prevalence of trachoma in the Afar Region of Ethiopia: results of seven population-based surveys from the Global Trachoma Mapping Project

Figures & data

Figure 1. Administrative woredas and evaluation units, Global Trachoma Mapping Project, Afar, Ethiopia, 2013.

Table 1. Individuals enumerated in seven trachoma prevalence surveys, Global Trachoma Mapping Project, Afar, Ethiopia, 2013.

				Individuals
Evaluation unit	Total Population	Kebeles (n)	Households (n)	Total residents (n)	Absent (n)	Refused (n)	Examined (n,%)
Berahle, Aba’ala	116,844	25	732	2763	228	24	2511 (90.9)
Mile, Ada’ar	90,673	23	770	2869	169	25	2675 (93.2)
Dupti, Kurri	95,994	27	706	2578	179	40	2359 (91.5)
Elidihare, Ayesayeta, Afamboo	133,043	26	724	2592	174	29	2389 (92.2)
Bure Mudaitu, Gewane, Amibara, Dulecho	146,577	25	720	2579	82	18	2479 (96.1)
Dalolo, Konebo	138,128	26	725	2518	167	11	2340 (92.9)
Telalak, Dalefage, Dewe, Hadele Ele	116,521	26	688	2278	114	12	2152 (94.5)
Total	837,780	178	5065	18177	1113	159	16905 (93.0)

Table 2. Prevalence of trachomatous inflammation –follicular (TF) in children aged 1–9 years, Global Trachoma Mapping Project, Afar, Ethiopia, 2013.

Evaluation unit	Examined (n)	TF cases (n)	Unadjusted^a TF (%)	Adjusted^b TF (%)	95% CI^c
Berahle, Aba’ala	1041	117	11.2	8.7	[5.2–12.4]
Mile, Ada’ar	1007	41	4.1	4.1	[2.1–6.8]
Dupti, Kurri	861	73	8.5	7.2	[4.1–11.5]
Elidihare, Ayesayeta, Afamboo	807	57	7.1	6.3	[3.4–10.2]
Bure Mudaitu, Gewane, Amibara, Dulecho	915	74	8.1	6.5	[3.8–9.6]
Dalolo, Konebo	925	87	9.4	7.7	[5.1–11.2]
Telalak, Dalefage, Dewe, Hadele Ele	843	162	19.2	17.1	[9.4–25.5]
Total	6399	611	9.5	8.2	-

^acrude prevalence estimate (total cases/total examined)

^badjusted at cluster-level for age in one year age bands, with the overall adjusted prevalence being the mean of all such estimates in a given evaluation unit

^c95% confidence interval obtained by bootstrapping adjusted cluster-level proportions over 10,000 iterations, and taking the 2.5^th and 97.5^th centiles.

Figure 2. Prevalence of trachomatous inflammation–follicular (TF) in children aged 1–9 years, Global Trachoma Mapping Project, Afar, Ethiopia, 2013.

Table 3. Prevalence of trichiasis in those aged 15 years or greater, Global Trachoma Mapping Project, Afar, Ethiopia, 2013.

Evaluation unit	Examined (n)	Trichiasis cases (n)	Unadjusted^a trichiasis (%)	Adjusted^b trichiasis (%)	95%CI^c
Berahle, Aba’ala	1243	14	1.1	0.5	[0.2–1.0]
Mile, Ada’ar	1370	8	0.6	0.2^d	[0.0–0.5]
Dupti, Kurri	1308	6	0.5	0.1	[0.0–0.4]
Elidihare, Ayesayeta, Afamboo	1408	7	0.5	0.2^e	[0.1–0.4]
Bure Mudaitu, Gewane, Amibara, Dulecho	1329	26	2	1.2	[0.6–1.6]
Dalolo, Konebo	1219	13	1.1	0.3	[0.1–0.5]
Telalak, Dalefage, Dewe, Hadele Ele	1135	29	2.6	1.2	[0.6–2.0]
Total	9012	103	1.1	0.5	-

^acrude prevalence estimate (total cases/total examined)

^badjusted at cluster-level for sex and age in 5 year age bands, with the overall adjusted prevalence being the mean of all such estimates in a given evaluation unit

^c95% confidence interval obtained by bootstrapping adjusted cluster-level proportions over 10,000 iterations, and taking the 2.5^th and 97.5^th centiles.

^drounded down to 0.2%; ^erounded up to 0.2%

Figure 3. Prevalence of trichiasis in those aged 15 years or greater, Global Trachoma Mapping Project, Afar, Ethiopia, 2013.