Table 3.

Erreygers Concentration Index for access to drinking water in Peruvian households, ENAHO 2008–2018

Year	General population (excluding rural areas)		City size
			401 to 10,000 households		10,001 to 100,000 households		≥ 101,001 households
	ECI	SE	ECI	SE	ECI	SE	ECI	SE
2008	0.305	0.0145	0.045	0.0172	0.092	0.0220	0.087	0.0267
2009	0.373	0.0132	0.111	0.0112	0.075	0.0198	0.043	0.0283
2010	0.356	0.0123	0.085	0.0099	0.067	0.0203	0.026	0.0258
2011	0.383	0.0113	0.102	0.0091	0.073	0.0170	0.051	0.0232
2012	0.365	0.0114	0.103	0.0099	0.082	0.0177	0.023	0.0248
2013	0.436	0.0097	0.103	0.0076	0.107	0.0191	0.067	0.0204
2014	0.416	0.0100	0.096	0.0087	0.110	0.0183	0.107	0.0211
2015	0.382	0.0104	0.089	0.0079	0.106	0.0181	0.016	0.0216
2016	0.381	0.0096	0.113	0.0090	0.120	0.0180	−0.022	0.0209
2017	0.367	0.0097	0.110	0.0077	0.073	0.0178	−0.007	0.0215
2018	0.405	0.0092	0.140	0.0095	0.073	0.0185	0.018	0.0194
P-value*	< 0.001		< 0.001		0.517		0.036

ECI Erreygers Concentration Index; SE standard error

* For differences between 2018 ECI vs. 2008 ECI