Table 3.

Changes in inequalities measured by means of the concentration index of access to oral health services during the last year in Peruvian children under 12 years of age between 2017 and 2021

Characteristic	2017		2021		Diff	p-value*
	n	ECI	n	ECI	2021–2017
Overall	38787	0.2203	36729	0.1239	-0.0963	< 0.001
Age
Until 2 years	12724	0.2084	11641	0.0626	-0.1457	< 0.001
3 to 5 years	10923	0.2359	11064	0.1107	-0.1252	< 0.001
6 to 11 years	15140	0.2344	14024	0.1606	-0.0737	< 0.001
Sex
Female	19273	0.2345	18156	0.1323	-0.1022	< 0.001
Male	19514	0.2068	18573	0.1163	-0.0905	< 0.001
Area of residence
Urban	26580	0.1657	24050	0.1406	-0.0250	0.157
Rural	12207	0.1924	12679	0.0957	-0.0967	< 0.001
Region
Coast	15784	0.1808	14851	0.1646	-0.0162	0.465
Highlands	12246	0.1969	11947	0.1414	-0.0554	0.030
Jungle	10757	0.2765	9931	0.1368	-0.1397	< 0.001
Health insurance
Yes	33286	0.2157	33414	0.1221	-0.0936	< 0.001
Does not have/does not know	5501	0.2940	3315	0.1501	-0.1439	< 0.001
Mother’s language
Native	9011	0.1784	8459	0.0448	-0.1336	< 0.001
No native	29776	0.2355	28270	0.1403	-0.0951	< 0.001
Tutor educational level
Until primary	10806	0.1657	8800	0.0414	-0.1243	< 0.001
Secondary	17573	0.1222	17359	0.0155	-0.1067	< 0.001
Higher	10408	0.1109	10570	0.1393	0.0283	0.313

ECI Erreygers concentration index, Diff differences between ECI 2017 and ECI 2021

^*p-value indicates the probability of non-significant change in inequalities according to the concentration index from 2017 to 2021

^aAll estimates took into account the ENDES sample design