Study of Chronic Diseases (Edoc): methodological aspects

Amaral, Thatiana Lameira Maciel; Amaral, Cledir de Araújo; Portela, Margareth Crisóstomo; Monteiro, Gina Torres Rego; Vasconcellos, Maurício Teixeira Leite de

doi:10.11606/S1518-8787.2019053000847

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Original Article • Rev. Saúde Pública 53 • 2019 • https://doi.org/10.11606/S1518-8787.2019053000847 copy

Study of Chronic Diseases (Edoc): methodological aspects

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

OBJECTIVE:

Describe the sampling design and other methodological aspects of the Study of Chronic Diseases (Edoc).

METHODS:

Edoc comprises two household surveys with distinct populations, one with adults aged 18 to 59 years (Edoc-A) and another with older adults aged 60 years or more (Edoc-I), living in Rio Branco, Acre. The selection of the participants used complex samples by clusters in two stages of selection, census enumeration areas (CEA) and household. In the first stage, common to both surveys, 40 CEAs were selected with probability proportional to size, and in the second stage, independent for each survey, households were selected with equal probability, and all the residents eligible for each survey were selected. Sampling weights were estimated by the inverse of the product of inclusion probabilities at each stage and then calibrated to produce unbiased population estimates. Interviews were held with questionnaires about socioeconomic and demographic conditions, life habits and health conditions. Anthropometric measures focused on measures of body height, girths and mass, while the vital signs analyzed were blood pressure, heart rate and respiratory rate. Blood and urine samples were collected for analysis.

RESULTS:

The Edoc comprised 1,701 participants, 685 of Edoc-A and 1,016 of Edoc-I. Considering the loss of information of some participants and the need of studying specific themes with production of population inferences, 16 subsamples of complete information by theme were generated and two subsamples were exclusive of Edoc-I.

CONCLUSIONS:

The Edoc has as important developments the analyses of epidemiological profile of the population from the capital of the state of Acre, contributing to the production of knowledge in public health with useful information for decisions in public health policies.

DESCRIPTORS:
Adult; Aged; Chronic Disease; Epidemiology; Health Surveys; Methods

Survey, sex and age group			Population projection (July 1, 2014)	Effective sample size	Initial weight		Calibrated weight
Survey, sex and age group			Population projection (July 1, 2014)	Effective sample size	Estimate	Relative error (%)	Estimate	Relative error (%)
Edoc			235,318	1,701	183,381	-22.07	235,318	0.00
	Women		122,798	1,071	123,212	0.34	122,798	0.00
	Men		112,520	630	60,169	-46.53	112,520	0.00
Edoc-A			211,902	685	149,883	-29.27	211,902	0.00
	Women		110,278	473	103,496	-6.15	110,278	0.00
		18 to 29 years	45,290	160	35,009	-22.70	45,290	0.00
		30 to 39 years	30,714	103	22,537	-26.62	30,714	0.00
		40 to 49 years	20,983	100	21,881	4.28	20,983	0.00
		50 to 59 years	13,291	110	24,069	81.09	13,291	0.00
	Men		101,624	212	46,387	-54.35	101,624	0.00
		18 to 29 years	42,443	57	12,472	-70.61	42,443	0.00
		30 to 39 years	28,000	56	12,253	-56.24	28,000	0.00
		40 to 49 years	19,059	45	9,846	-48.34	19,059	0.00
		50 to 59 years	12,122	54	11,816	-2.52	12,122	0.00
Edoc-I			23,416	1,016	33,498	43.06	23,416	0.00
	Women		12,520	598	19,716	57.48	12,520	0.00
		60 to 69 years	7,118	301	9,924	39.42	7,118	0.00
		70 to 79 years	3,611	200	6,594	82.61	3,611	0.00
		80 years or more	1,791	97	3,198	78.56	1,791	0.00
	Men		10,896	418	13,782	26.49	10,896	0.00
		60 to 69 years	6,276	194	6,396	1.91	6,276	0.00
		70 to 79 years	3,076	147	4,847	57.57	3,076	0.00
		80 years or more	1,544	77	2,539	64.44	1,544	0.00

Survey, sex and age group			Total	Alcohol	WC	HGS	SAP	Obes	Smoking	FA	Depr
Edoc			1,701	1,631	1,612	1,609	1,638	1,598	1,695	1,011	1,008
	Women		1,071	1,034	1,017	1,015	1,035	1,010	1,067	595	595
	Men		630	597	595	594	603	588	628	416	413
Edoc-A			685	659	645	643	644	641	679	–	–
	Women		473	456	447	446	447	445	469	–	–
		18 to 29 years	160	151	147	146	144	146	158	–	–
		30 to 39 years	103	103	96	96	96	97	102	–	–
		40 to 49 years	100	95	98	98	100	97	99	–	–
		50 to 59 years	110	107	106	106	107	105	110	–	–
	Men		212	203	198	197	197	196	210	–	–
		18 to 29 years	57	55	51	51	49	49	56	–	–
		30 to 39 years	56	52	49	49	50	49	56	–	–
		40 to 49 years	45	45	44	44	44	44	45	–	–
		50 to 59 years	54	51	54	53	54	54	53	–	–
Edoc-I			1,016	972	967	966	994	957	1,016	1,011	1,008
	Women		598	578	570	569	588	565	598	595	595
		60 to 69 years	301	292	286	285	292	284	301	299	299
		70 to 79 years	200	192	191	191	200	188	200	199	199
		80 years or more	97	94	93	93	96	93	97	97	97
	Men		418	394	397	397	406	392	418	416	413
		60 to 69 years	194	185	182	183	186	181	194	194	192
		70 to 79 years	147	138	142	140	144	138	147	146	145
		80 years or more	77	71	73	74	76	73	77	76	76

Survey, sex and age group			Total	Alb	TC	Sc	DM	DLP	Hb	MS
Edoc			1,701	1,615	1,631	1,632	1,637	1,632	1,626	1,617
	Women		1,071	1,018	1.029	1.029	1,035	1,030	1,026	1,018
	Men		630	597	602	603	602	602	600	599
Edoc-A			685	637	649	649	651	649	649	642
	Women		473	441	451	451	453	451	451	446
		18 to 29 years	160	146	150	150	150	150	150	146
		30 to 39 years	103	92	97	97	98	97	97	97
		40 to 49 years	100	98	98	98	98	98	98	98
		50 to 59 years	110	105	106	106	107	106	106	105
	Men		212	196	198	198	198	198	198	196
		18 to 29 years	57	51	51	51	51	51	51	50
		30 to 39 years	56	49	50	50	50	50	50	49
		40 to 49 years	45	44	44	44	44	44	44	44
		50 to 59 years	54	52	53	53	53	53	53	53
Edoc-I			1,016	978	982	983	986	983	977	975
	Women		598	577	578	578	582	579	575	572
		60 to 69 years	301	288	289	289	291	290	287	288
		70 to 79 years	200	196	195	195	196	195	194	192
		80 years or more	97	93	94	94	95	94	94	92
	Men		418	401	404	405	404	404	402	403
		60 to 69 years	194	183	185	186	185	185	185	184
		70 to 79 years	147	143	144	144	144	144	142	144
		80 years or more	77	75	75	75	75	75	75	75

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[1] Correspondence: Thatiana Lameira Maciel Amaral Campus Universitário Centro de Ciências da Saúde e do Desporto BR 364 km 4 Distrito Industrial Caixa postal 500 69920-900 Rio Branco, AC, Brasil E-mail: thatianalameira27@gmail.com