Table 2. Prevalence of CKD according to sociodemographic characteristics and life habits of older adults in Rio Branco, state of Acre, 2014.

Variable	Total		CKD						p
			Yes			No
	n	N	n	N	%	n	N	%
Sex									0.519
Female	577	12,496	123	2,570	20.6	454	9,926	79.4
Male	406	10,920	96	2,409	22.1	310	8,511	77.9
Age group (years)									< 0.001
60–69	475	13,394	75	2,134	15.9	400	11,260	84.1
70–79	339	6,687	80	1,586	23.7	259	5,101	76.3
80 and more	169	3,335	64	1,259	37.8	105	2,076	62.2
Skin color									0.158
White	241	5,601	62	1,374	24.5	179	4,227	75.5
Brown	634	15,221	140	3,217	21.1	494	12,004	78.9
Other	108	2,594	17	388	15.0	91	2,206	85.0
Education level*									0.804
Higher education	38	954	10	231	24.2	28	723	75.8
High school	112	2,828	21	528	18.7	91	2,300	81.3
Elementary school	360	8,721	76	1,807	20.7	284	6,914	79.3
Illiterate/Literate	465	10,712	109	2,344	21.9	356	8,368	78.1
Marital status*									0.011
Married	365	9,144	80	1,994	21.8	285	7,150	78.2
Single	178	4,356	28	591	13.6	150	3,765	86.4
Widow/Widower	317	6,793	85	1,754	25.8	232	5,039	74.2
Separated/Divorced	117	2,980	25	616	20.7	92	2,365	79.3
Physical activity									0.153
Yes	149	3,654	26	593	16.2	123	3,061	83.8
No	834	19,762	193	4,386	22.2	641	15,376	77.8
Smoking									0.148
Non-smoker	282	6,696	71	1,618	24.2	211	5,078	75.8
Ex-smoker	537	12,541	119	2,689	21.4	418	9,852	78.6
Smoker	164	4,179	29	672	16.1	135	3,507	83.9
Consumption of alcoholic beverage									0.149
No	857	20,138	185	4,131	20.5	672	16,007	79.5
Yes	80	2,175	23	600	27.6	57	1,575	72.4

N: expanded n from sampling weights and design; %: proportion from N; χ ² = p: Pearson’s chi-squared test; CKD: chronic kidney disease

* The differences in relation to the total are due to the lack of information in the variable.