Table 6

Comparability of study areas in zones A, B, and C and living circumstances (%)

		Zone^6-150
		A	B	C
Respondents (n)	1539	1464	1485
Socioeconomic characteristics:
Unemployment:
Men	30	32	33
Women	12	15	14
No access to a car	45	53	51
Population stability, same address for most of life	57	58	59
Occupational exposure:
Worked in dusty industry for most of working life:
Men	31	28	23
Women	7	8	7
Smoking history:
Current smokers:
Men	37	39	35
Women	35	43	45
Duration of years smoked (smokers only):
Men	28	27	24
Women	24	24	24
Indoor air pollution exposure:
Gas cooker	73	69	74
Gas or coal fire	42	40	48
Causes of worry or stress over past year:
Air pollution	26	10	8
Smells outside	17	6	4