Table 2.

The prevalence rate of S. haematobium infection of children of sentinel primary schools at Al Jabalain and El Salam district at baseline and 8 months after MDA

District	Variable	Baseline survey			Follow-up survey			Reduction rate (%)	95% CI	P-value
		No. exam	No. positive	%	No. exam	No. positive	%
Al Jabalain	Unit
	Al Jabalain	291	80	27.5	312	17	5.4	80.2	0.09–026	<0.001
	Assalaya	250	28	11.2	300	7	2.3	79.2	0.08–0.44	<0.001
	Jazeera Aba	129	4	3.1	148	0	0.0	100		0.996
	Joda	300	3	1.0	305	1	0.3	67.2	0.03–3.15	0.332
	Kenana	451	18	4.0	300	2	0.7	83.3	0.04–0.70	0.015
	Rabak	211	16	7.6	307	3	1.0	87.1	0.04–0.42	<0.001
	Subtotal	1,632	149	9.1	1,672	30	1.8	80.3	0.12–0.27	<0.001
El Salam	Unit
	Al Rawat	188	83	44.1	301	25	8.3	81.2	0.07–0.19	<0.001
	Al Zelit	291	131	45.0	315	5	1.6	96.5	0.01–0.05	<0.001
	Al Naeem	312	105	33.7	300	31	10.3	69.3	0.15–0.35	<0.001
	Al Kewaik	150	33	22.0	304	2	0.7	97.0	0.01–0.10	<0.001
	Al Migainis	211	54	25.6	305	21	6.9	73.1	0.13–0.37	<0.001
	Subtotal	1,152	406	35.2	1,525	84	5.5	84.4	0.08–0.14	<0.001
Total	Gender
	Boys	2,127	424	19.9	2,328	88	3.8	81.0	0.12–0.20	<0.001
	Girls	657	131	19.9	869	26	3.0	85.0	0.08–0.19	<0.001
	Age group
	≤9–year-old	1,032	188	18.2	1,157	28	2.4	86.7	0.07–0.17	<0.001
	10~12-year-old	1,048	218	20.8	1,313	57	4.3	79.1	0.13–0.23	<0.001
	≥13-year-old	704	149	21.2	727	29	4.0	81.2	0.10–0.23	<0.001
Total		2,784	555	19.9	3,197	114	3.6	82.1	0.12–0.18	<0.001

^*The follow-up survey was conducted at 8 months after MDA. 95% CI; 95% confidence intervals.

Reduction Rate=(prevalence at baseline survey-prevalence at follow-up survey)/prevalence at baseline survey×100.