Table 3.

Decomposition results: contributions of determinants to concentration indices (absolute value and percentage of total explanatory variables)^a

	Asthma (n = 622)		Hypertension (n = 2741)		Peptic ulcer (n = 1277)		Musculoskeletal pain (n = 1580)
Crude concentration indexb	−0.089		−0.068		−0.131		−0.176
Demographic characteristics
Age-sex	CCI	%c	CCI	%	CCI	%	CCI	%
Males aged 30-44	−0.001	0.7	0.002		0.001		0.005
Males aged 45-59	0.000		0.006		0.003		0.011
Males aged 60+	−0.028	21.4	−0.037	20.0	−0.013	7.8	−0.052	13.2
Females aged 15-29	−0.001	0.6	0.000		0.002		−0.001	0.3
Females aged 30-44	0.002		0.004		0.007		0.007
Females aged 45-59	0.000	0.2	−0.002	1.2	−0.001	0.4	−0.003	0.7
Females aged 60+	−0.014	10.9	−0.076	40.7	−0.025	15.6	−0.109	27.9
Household
One-person male household	0.000	0.4	0.000		0.002		0.001
One-person female household	−0.001	0.5	0.000	0.3	−0.004	2.5	−0.004	1.0
Household with elderly	−0.002	1.4	0.002		0.009		0.009
Household with only dependents	0.009		−0.008	4.4	0.004		−0.015	3.9
Socioeconomic characteristics
Education
Education: primary level or less	−0.036	27.3	−0.031	16.8	−0.030	18.5	−0.061	15.5
Education: secondary level	0.007		0.002		0.001		0.004
Occupation
Work: agriculture and fishery	0.030		0.019		0.002		−0.024	6.1
Work: elementary occupation	0.000	0.0	−0.001	0.6	0.000		0.000	0.1
Not in workforce: housewife	0.000	0.2	−0.001	0.5	0.001		0.000	0.1
Not in workforce: disabled	−0.003	2.6	−0.004	2.2	0.002		−0.011	2.8
Not in workforce: others, such as students	0.001		−0.006	3.4	0.006		−0.009	2.4
Geographic characteristics
Bangkok	−0.007	5.0	−0.011	5.7	0.001		0.020
Rural Central	0.004		0.002		0.003		0.000
Urban North	0.000		0.001		0.002		0.002
Rural North	−0.013	10.2	−0.007	3.9	−0.033	20.3	−0.059	15.0
Urban Northeast	0.001		−0.001	0.3	0.002		0.000
Rural Northeast	−0.023	17.3	0.050		−0.055	34.1	−0.040	10.3
Urban South	0.005		0.002		0.001		0.001
Rural South	−0.002	1.3	0.001		−0.001	0.7	−0.002	0.6
Total explained	−0.073	100	−0.096	100	−0.114	100	−0.329	100
Residuals (unexplained)	−0.017		0.028		−0.018		0.154

CCI = Contribution to Concentration Index.

^aReference groups were males aged 15–29; household with no elderly; work status: others including professionals, technicians, or service workers; and urban Central excluding Bangkok. Elementary occupations include the likes of street vendors, domestics, and nonagricultural laborers.

^bCrude concentration indices are not adjusted for age and sex.

^cPercentages shown are proportional contributions to the total explained negative concentration index.