Table 3

Odds ratios (ORs (95% CIs)) for risk of disability in activities of daily living among elderly people in Taiwan by social class indicated by occupation

Social class indicated by longest held occupation in a lifetime		Controls n		Cases n	Crude estimates		Adjusted estimates
		Controls n		Cases n	OR (95% CI)	p Value	OR^3-150 (95% CI)	p Value
Higher level white collar workers^3-151	75	22	1.0		1.0
Lower level white collar workers	31	10	1.2 (0.5 to 2.6)	0.73	1.0 (0.4 to 2.5)	0.98
Skilled blue collar workers	49	19	1.4 (0.7 to 2.7)	0.33	1.4 (0.7 to 2.9)	0.34
Unskilled blue collar workers	241	120	1.8 (1.1 to 2.8)	0.01	1.8 (1.1 to 3.0)	0.02
Total	396	171			p for trend=0.03

↵3-150 Odds ratios were calculated from unconditional logistic regression models with adjustment for age, sex, education level, marital status, cigarette and alcohol consumption, exercise, co-morbidity and duration of employment for longest held occupation in a lifetime.
↵3-151 Reference category.