Table 2. Prevalence of any infection and moderate-to-heavy intensity infections before and after quality control on fecal egg counts.

The prevalence of each soil-transmitted helminth in each study site was calculated based on the duplicate Kato-Katz results at baseline using both the original dataset (Pre-QC FEC dataset) as well as that dataset after adjusting for discrepancies detected during quality control (QC) on the fecal egg counts (Post-QC FEC dataset). The infection intensity in both datasets was classified into light and moderate-to-heavy intensity (MHI) according to the thresholds set by the World Health Organization [10]. Values that differ between both datasets are highlighted in bold font.

		Pre-QC FEC			Post-QC FEC
Country	STH species	Any intensity (%)	Light (%)	MHI (%)	Any intensity (%)	Light (%)	MHI (%)
Brazil	Ascaris	12.2	2.8	9.3	12.2	2.8	9.3
n = 246	Trichuris	0.0	0.0	0.0	0.0	0.0	0.0
	Hookworm	7.3	7.3	0.0	7.3	7.3	0.0
Ethiopia	Ascaris	33.3	22.0	11.3	33.1	21.6	11.5
n = 495	Trichuris	33.5	32.5	1.0	33.3	32.5	0.8
	Hookworm	22.2	21.8	0.4	22.0	21.4	0.6
Lao PDR	Ascaris	23.5	14.1	9.4	23.5	14.1	9.4
n = 469	Trichuris	24.5	23.2	1.3	24.5	23.2	1.3
	Hookworm	58.2	45.2	13.0	58.2	45.2	13.0
Tanzania	Ascaris	58.1	19.0	39.1	58.4	19.4	39.1
n = 315	Trichuris	98.4	31.1	67.3	98.4	30.8	67.6
	Hookworm	37.8	36.2	1.6	37.8	34.0	3.8