Mapping Trachoma in the Solomon Islands: Results of Three Baseline Population-Based Prevalence Surveys Conducted with the Global Trachoma Mapping Project

Figures & data

Table 1. Sampled population, Global Trachoma Mapping Project, Solomon Islands, September–November 2013.

	Province
	Choiseul	Western	Rennell-Bellona/Temotu	Total
Sampled, n	2709	3129	4053	9891
Examined, n (%)	2634 (97.2)	2914 (93.1)	3676 (90.7)	9224 (93.3)
Absent, n (%)	56 (2.1)	213 (6.8)	340 (8.4)	609 (6.2)
Refused, n (%)	19 (0.7)	2 (0.1)	36 (0.9)	57 (0.6)
Age, median years (range)	17 (1–99)	17 (1–95)	19 (1–100)	18 (1–100)
Female, n (%)	1165 (43.0)	1458 (46.6)	1964 (48.5)	4587 (46.3)
Households, n	742	751	955	2448

Figure 1. Coordinates of villages sampled in the three evaluation units surveyed, Global Trachoma Mapping Project, Solomon Islands, September–November 2013, and trachomatous inflammation – follicular (TF) prevalence estimates in five other provinces.¹⁰ Shapefile source: Global administrative areas (gadm.org).

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

Evaluation unit	Examined, n	TF, n (%)	Adjusted^a TF, % (95% CI)
Choiseul	881	66 (7.5)	6.1 (4.1–8.6)
Western	996	226 (22.7)	20.4 (15.6–26.3)
Rennell-Bellona/Temotu	1136	296 (26.1)	22.0 (18.5–26.0)

^aAdjusted by age in 1-year bands.

CI, confidence interval.

Table 3. Prevalence of trichiasis in those aged 15 years or older, Global Trachoma Mapping Project, Solomon Islands, September–November 2013.

Evaluation unit	Examined, n (%)		Trichiasis, n (%)		Adjusted^a trichiasis, % (95% CI)
	Male	Female	Male	Female
Choiseul	533 (36.9)	913 (63.1)	0 (0.0)	0 (0.0)	0.0 (0.0–0.2)
Western	712 (42.4)	967 (57.6)	3 (0.4)	3 (0.3)	0.16 (0.0–0.5)
Rennell-Bellona/Temotu	1064 (45.5)	1275 (54.5)	0 (0.0)	2 (0.2)	0.04 (0.0–0.3)

^aAdjusted for sex and age in 5-year bands.

CI, confidence interval.

Figure 2. Trachomatous inflammation – follicular (TF) prevalence in children aged 1–9 years, Global Trachoma Mapping Project, Solomon Islands, September–November 2013. Shapefile source: Global administrative areas (gadm.org).

Figure 3. Trichiasis prevalence in those aged 15 years and older, Global Trachoma Mapping Project, Solomon Islands, September–November 2013. Shapefile source: Global administrative areas (gadm.org).

Table 4. Multilevel univariable random effects logistic regression of factors against the outcome of trachomatous inflammation – follicular (TF) in children aged 1–9 years, Global Trachoma Mapping Project, Solomon Islands, September–November 2013.

WASH variable	Odds ratio (95% CI)	p-value
Use of improved drinking source	1.31 (0.96–1.80)	0.084
Use of improved washing source	1.01 (0.69–1.47)	0.972
Household private latrine	0.87 (0.54–1.41)	0.576
Household improved latrine	0.79 (0.50–1.25)	0.306
Overall latrine category (open defecation vs unimproved vs improved latrine)		0.29
Open defecation	1.0 (reference)
Unimproved latrine	0.89 (0.71–1.12)
Improved latrine	0.76 (0.53–1.11)
Time to get to washing water		0.13
All face washing done at water source	1.0 (reference)
Water source in the yard	0.73 (0.37–1.43)
Less than 30 minutes	1.21 (0.62–2.32)
Between 30 minutes and 1 hour	0.98 (0.47–2.03)
More than 1 hour	1.19 (0.44–3.17)
Time to get to drinking water		0.579
Water source in the yard	1.0 (reference)
Less than 30 minutes	1.28 (0.86–1.90)
Between 30 minutes and 1 hour	1.18 (0.70–2.00)
More than 1 hour	1.48 (0.77–2.84)

CI, confidence interval.

International Association for the Prevention of Blindness. Trachoma Mapping in the Pacific, 2013.

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