Association between social group participation and perceived health among elderly inhabitants of a previously methylmercury-polluted area

Table 2 Association between perceived health and social group membership

	Odds ratio (95 % CI)
	Model 1^a	Model 2^b	Model 3^c
Group memberships
Community-related group	1.24 (0.77–2.00)	1.14 (0.68–1.91)	1.00 (0.56–1.79)
Business-related group	0.86 (0.46–1.61)	0.92 (0.47–1.79)	0.99 (0.47–2.10)
Hobby- and volunteer-related group	1.87 (1.07–3.27)*	1.82 (1.01–3.26)*	1.97 (1.02–3.80)*
Belief-related group	1.22 (0.71–2.08)	1.05 (0.59–1.86)	1.30 (0.68–2.48)
Age
65–69			1
70–74			1.47 (0.80–2.72)
75 and above			1.91 (0.97–3.77)
Sex
Male			1
Female			0.91 (0.52–1.61)
Living arrangement
Living alone			1
Living with a spouse only			3.74 (1.38–10.14)*
Living with a spouse and family members			4.31 (1.40–13.24)*
Educational level
Less than high school			1
High school			0.53 (0.30–0.96)*
More than high school			0.27 (0.11–0.66)**
Annual income per capita
<750,000			1
750,000–910,000			1.55 (0.61–3.96)
920,000–1,490,000			1.91 (0.67–5.49)
>1,500,000			3.00 (0.97–9.34)
Chronic disease		0.37 (0.22–0.62)**	0.28 (0.15–0.52)**
ADL scores		0.84 (0.77–0.92)**	0.82 (0.74–0.91)**

* <0.05, ** <0.01
^aUnadjusted odds ratio
^bAdjusted for the variables of physician contact by chronic disease and ADL scores
^cAdjusted for the variables of age, sex, living arrangement, education level, annual income per capita, physician contact by chronic disease, and ADL scores

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