Table 4.

Baseline, midterm and endline STH prevalence (%) and relative reduction (RR) by county among Kenyan school-aged children, 2012–2017

	STH combined				Hookworm				A. lumbricoides				T. trichiura
County	Y1 baseline	Y3 midterm	Y5 endline	RR (%)	Y1 baseline	Y3 midterm	Y5 endline	RR (%)	Y1 baseline	Y3 midterm	Y5 endline	RR (%)	Y1 baseline	Y3 midterm	Y5 endline	RR (%)
Overall	32.3	16.4	13.5	58.2*	15.4	2.3	1.3	91.6*	18.1	11.9	9.6	46.8*	6.7	4.5	4.1	38.4*
Bomet	29.7	23.3	18.1	39.1*	0.2	0.1	0.1	49.9	27.9	20.9	15.2	45.5*	3.9	5.7	4.5	+
Bungoma	49.5	10.9	7.3	85.2*	44.0	1.8	0.9	98.0*	30.7	9.7	6.6	78.6*	0.8	0	0.2	73.5*
Busia	36.1	25.7	16.9	53.3*	20.9	3.1	2.7	87.1*	14.4	15.1	7.2	49.9*	12.5	14.1	10.1	18.9
Homa Bay	30.3	16.4	11.5	62.0*	14.7	5.2	2.7	81.9*	17.3	11.4	7.8	55.2*	5.8	2.9	2.9	50.4*
Kakamega	31.4	15.9	9.8	68.8*	23.1	0.8	0.5	97.7*	23.1	15.0	9.3	59.6*	0.7	0.7	0.3	61.1
Kericho	29.2	16.7	21.0	27.9*	5.7	0.1	0.2	97.2*	24.5	14.6	18.1	26.1*	4.7	4.0	4.8	+
Kilifi	33.5	2.9	2.9	91.3*	28.1	1.4	0.8	97.2*	2.0	0.4	0.5	75.0	6.5	1.4	1.9	70.8*
Kisii	46.8	26.2	23.7	49.4*	11.1	1.4	0.9	92.1*	39.7	25.4	22.8	42.4*	1.3	1.1	1.0	26.9
Kisumu	17.4	4.7	4.0	76.8*	8.4	0.5	0.7	92.2*	7.8	2.4	1.8	77.0*	4.1	2.0	2.0	51.6
Kwale	33.6	11.1	4.8	85.7*	27.7	9.6	3.3	88.1*	0.8	0.4	0.2	75.0	8.9	2.4	1.7	80.9*
Migori	22.3	2.1	2.2	90.2*	20.1	0.7	0.4	98.2*	3.4	1.4	1.7	49.4	0.7	0.1	0.2	65.1
Mombasa	18.1	2.5	1.8	90.1*	5.5	0.8	0.4	92.7*	1.2	0	0.4	66.7*	15.6	1.8	1.0	93.6*
Narok	53.0	39.7	43.1	18.7*	5.0	0.8	1.2	75.0*	29.3	20.3	19.7	32.7*	30.2	26.6	28.6	5.1
Nyamira	31.6	19.1	17.6	44.4*	1.9	0.4	0.1	95.1*	27.6	18.8	17.4	37.0*	3.1	0.5	0.4	87.6*
Taita Taveta	2.5	0.4	0.9	60.0*	0.9	0.1	0.4	55.6*	0.4	0	0.3	25.0	1.4	0.3	0.3	78.6*
Vihiga	50.2	35.9	32.8	34.7*	16.0	1.8	2.2	86.1*	44.4	33.9	30.0	32.5*	9.9	7.2	6.7	32.2

*Statistically significant (P < 0.05) relative reduction in prevalence

+ indicates an increase rather than relative reduction in prevalence