Table 3.

Comparison of the geometric means of the urinary metabolite concentrations for the intervention and control communities at baseline (year 1) and follow-up (year 4).

	Year	GM (μg/L)	GSD	Fold difference (year 4/year 1)	p-Value	Fold difference int (year 4/year 1)/ctl (year 4/year 1)	p-Value
Adult DMP						0.6	0.26
Intervention	1	1.7	7.1	1.2	0.33
	4	2.1	9.0
Control	1	0.9	7.5	2.0	0.11
	4	1.8	7.0
Adult DMTP						1.3	0.21
Intervention	1	12.3	4.9	6.6	< 0.005
	4	81.4	6.0
Control	1	9.7	4.9	5.0	< 0.005
	4	48.3	3.1
Adult DMDTP						2.0	0.06
Intervention	1	0.9	8.8	8.8	< 0.005
	4	8.1	6.6
Control	1	1.1	5.7	4.4	< 0.005
	4	5.0	7.9
Child DMP						1.3	0.29
Intervention	1	2.8	2.8	1.3	0.23
	4	3.4	1.9
Control	1	2.6	3.4	0.9	0.43
	4	2.5	2.8
Child DMTP						1.1	0.35
Intervention	1	4.5	3.4	4.0	< 0.005
	4	18.2	4.3
Control	1	6.1	3.8	3.6	< 0.005
	4	21.9	3.1
Child DMDTP						1.8	0.07
Intervention	1	0.8	4.4	4.1	< 0.005
	4	3.2	3.9
Control	1	1.0	5.1	2.3	< 0.005
	4	2.2	4.2

Abbreviations: ctl, control; GM, geometric mean; GSD, geometric standard deviation; int, intervention.