Table 1.

Distribution and evolution of demographic, socio-economic, environmental and health characteristics related to children aged 6–60 months from Alagoas State, Northeast Brazil, 2005–2015

	Survey I, 2005 (n 666)		Survey II, 2015 (n 782)
Variable	n	%	n	%	Variation (%)	P value
Age of child (months)
≤24	299	44·9	295	37·7	−16·0	0·006
>24	367	55·1	487	62·3	13·1
Sex of child
Male	317	47·6	388	49·6	4·2	0·444
Female	349	52·4	394	50·4	−3·8
Age of mother (years)
≤20	94	15·7	49	6·8	−56·7	<0·001
>20	506	84·3	673	93·2	10·6
Age of the first maternal pregnancy (years)
≤20	393	66·9	425	62·0	−7·3	0·064
>20	194	33·1	261	38·0	14·8
Origin of water used to drink
Inadequate (river, well, rain, etc.)	185	27·8	252	32·3	16·2	0·061
Adequate (public network or bottled water)	481	72·2	527	67·7	−6·2
Number of rooms in the house
≤4	266	39·9	154	19·8	−50·4	<0·001
>4	400	60·1	625	80·2	33·4
Number of rooms used to sleep
≤2	485	72·8	538	69·1	−5·1	0·116
>2	181	27·2	241	30·9	13·6
Possession of durable consumer goods (television, car, washing machine or refrigerator)
≤2	579	86·9	436	55·8	−35·9	<0·001
>2	87	13·1	346	44·2	237·4
Place of residence
Rural	203	30·5	219	28·0	−8·2	0·293
Urban	462	69·5	563	72·0	3·6
Per capita income†
≤$US 57/month	483	77·3	199	27·9	−63·9	<0·001
>$US 57/month	142	22·7	515	72·1	217·6
Maternal education (number of years of study)
≤8	441	74·7	391	54·5	−27·0	<0·001
>8	149	25·3	327	45·5	79·8
Family size (number of people)
>4	375	56·5	326	41·7	−26·2	<0·001
≤4	289	43·5	456	58·3	34·0
Family using a government assistance programme
Yes	190	28·7	510	65·5	128·2	<0·001
No	472	71·3	269	34·5	−51·6
Child with diarrhoea‡
Yes	152	22·8	163	20·9	−8·3	0·384
No	514	77·2	616	79·1	2·5

^†$US 1·00=R$2·25 in January 2006 (Survey I); $US 1·00=R$2·63 in January 2015 (Survey II).

^‡Diarrhoea on the same day or up to 15 d before the interview.