Table 5. Prevalence of any infection and moderate-to-heavy intensity infections before and after quality control on data entry.

For each country and species of soil-transmitted helminth, the prevalence of any infection and moderate-to-heavy intensity (MHI) infections and the egg reduction rates (ERRs) following single albendazole treatment were calculated. This was done using the raw duplicate Kato-Katz data provided by data entry person 1 (P1), data entry person 2 (P2) and the dataset corrected for possible data entry errors (Corrected). The ERRs were classified into satisfactory (green), doubtful (yellow) or reduced (red) according to albendazole efficacy thresholds set by the World Health Organization [2]. Values that differ from the values obtained by analyzing the corrected database are highlighted in bold.

		Prevalence (%)			MHI prevalence (%)			ERR (%) & WHO classification
		Pre-data entry QC		Post data-entry QC	Pre-data entry QC		Post data-entry QC	Pre-data entry QC		Post data-entry QC
Country	STH species	P1	P2		P1	P2		P1	P2
Brazil	Ascaris	12.2	12.2	12.2	9.3	9.3	9.3	_	_	_
	Trichuris	0.0	0.0	0.0	0.0	0.0	0.0	_	_	_
	hookworm	7.3	7.3	7.3	0.0	0.0	0.0	_	_	_
Ethiopia	Ascaris	33.3	33.3	33.3	11.5	11.5	11.3	99.9	99.9	99.9
	Trichuris	33.3	33.5	33.5	0.8	0.8	1.0	43.5	44.9	47.7
	hookworm	22.2	22.4	22.2	0.6	0.6	0.4	95.9	95.8	95.9
Lao PDR	Ascaris	23.2	23.2	23.5	9.4	9.4	9.4	99.4	99.2	99.2
	Trichuris	24.1	24.1	24.5	1.3	1.5	1.3	40.2	49.0	40.5
	hookworm	58.0	57.1	58.2	12.8	12.8	13.0	96.2	96.3	96.2
Tanzania	Ascaris	58.7	59.0	58.1	39.1	39.1	39.1	97.4	97.3	97.4
	Trichuris	98.4	98.4	98.4	67.3	67.9	67.3	-19.4	-16.6	-18.1
	hookworm	38.1	38.1	37.8	1.6	1.6	1.6	87.2	86.0	85.6