Prevalence of Trachoma in Kogi State, Nigeria: Results of four Local Government Area-Level Surveys from the Global Trachoma Mapping Project

Figures & data

Table 1. Number of 1–9-year-olds and number of ≥15-year-olds resident, examined, absent and refused, by Local Government Area (LGA), Global Trachoma Mapping Project, Kogi State, Nigeria, June 2014.

	First 25 villages per LGA (original sample)						All villages
	Number of 1–9-year-olds		Number of ≥15-year-olds				Number of 1–9-year-olds				Number of ≥15-year-olds
LGA	Resident	Examined	Resident	Examined	Number of villages added	Total number of villages included	Resident	Examined	Absent	Refused	Resident	Examined	Absent	Refused
Bassa	728	704	1525	1443	2	27	805	781	0	23	1639	1557	62	19
Omala	1003	981	1422	1376	0	25	1003	981	5	17	1422	1376	33	12
Yagba East	552	534	1499	1393	12	37	1025	998	6	20	2052	1929	93	29
Yagba West	570	539	1333	1128	10	35	1162	1124	6	32	1744	1519	104	77
Totals						124	3995	3884	17	92	6857	6381	292	137

Table 2. Prevalence of trachomatous inflammation–follicular (TF) in 1–9-year-olds and prevalence of trichiasis in ≥15-year-olds, by Local Government Area, Global Trachoma Mapping Project, Kogi State, Nigeria, June 2014.

Local Government Area	Number of 1–9-year-olds with TF	Age-adjusted TF prevalence in 1–9-year-olds (%) [95% CI]	Number of ≥15-year-olds with trichiasis	Age- and gender-adjusted trichiasis prevalence in ≥15-year-olds (%) [95% CI]
Bassa	13	0.4 (0.1–0.8)	0	0.00
Omala	22	1.0 (0.3–1.9)	1	0.02 (0.00–0.07)
Yagba East	25	0.9 (0.0–2.6)	0	0.00
Yagba West	23	0.4 (0.0–1.0)	0	0.00

Figure 1. Prevalence of trachomatous inflammation-follicular (TF) in 1–9-year-old children, Global Trachoma Mapping Project, Kogi State, Nigeria, June 2014.

Table 3. Household-level access to water and sanitation, by Local Government Area (LGA), Global Trachoma Mapping Project, Kogi State, Nigeria, June 2014.

LGA	Number of households surveyed	Improved washing water source, n (%)	Washing water source <1km, n (%)	Improved sanitation facility, n (%)
Bassa	663	202 (30)	502 (76)	66 (10)
Omala	614	338 (55)	471 (77)	164 (27)
Yagba East	936	762 (81)	787 (84)	230 (25)
Yagba West	868	817 (94)	761 (88)	285 (33)

Figure 2. Prevalence of trachomatous inflammation–follicular (TF) among 1–9-year-olds, by age, Global Trachoma Mapping Project, Kogi State, Nigeria, June 2014.

Table 4. Univariable analysis of associations of trachomatous inflammation–follicular in 1–9-year-olds, Global Trachoma Mapping Project, Kogi State, Nigeria, June 2014.

Variable		Univariable OR^a (95% CI)^b	P-value^c
Age, years	1–3	0.49 (0.12–1.99)	0.3
	4–6	2.57 (1.06–6.21)	0.04
	7–9	1	–
Children aged 1–9 years in household, n	1–3	1	–
	≥4	2.35 (1.06–5.17)	0.03
Gender	Male	1	–
	Female	1.06 (0.51–2.18)	0.9
Open defecation (no facilities, bush, or field)	Yes	4.53 (0.46–44.71)	0.2
	No	1	–
Surface water used as drinking source	Yes	3.43 (0.83–14.22)	0.09
	No	1	–
Surface water used for face-washing	Yes	3.14 (0.83–11.82)	0.09
	No	1	–
Time to main source of drinking water, minutes	<30	1	–
	≥30	2.41 (0.67–8.67)	0.2
Time to main source of water used for face-washing, minutes	<30	1	–
	≥30	1.93 (0.51–7.28)	0.3
Altitude, metres above sea level	<250	1	–
	≥250	1.46 (0.51–4.20)	0.5

^aUnivariable random effects regression accounting for clustering at village- and LGA-level.

^bWald’s 95% confidence interval.

^cWald’s test.

OR, odds ratio; CI, confidence interval.

Table 5. Multivariable analysis of risk factors related to trachomatous inflammation–follicular in 1–9-year-olds, Global Trachoma Mapping Project, Kogi State, Nigeria, June 2014.

Variable		Multivariable OR^a (95% CI)^b	P-value^c
Age, years			0.004
	1–3	0.49 (0.12–1.98)	–
	4–6	2.59 (1.07–6.26)	–
	7–9	1	–
Children aged 1–9 years in household, n			0.03
	1–3	1	–
	≥4	2.39 (1.08–5.30)	–

^aMultivariable random effects regression accounting for clustering at village- and LGA-level. Multivariable ORs are adjusted for sex, age and number of children aged 1–9 years in household.

^bWald’s 95% confidence interval.

^cLikelihood ratio test of inclusion/exclusion of variable in final model.

OR, odds ratio; CI, confidence interval.