TABLE 4.

Relative risk Estimates for the Control and the Exposed Area (with and without dose estimates) for Different Periods for Cardiovascular Disease, for Heart diseas and for Stroke, Adjusted for Gender, Attained Age, and Ethnicity with No Lag time

	1960–1969	1970–1979		1980–1989		1990–1999
Control area
Person-years	91,161	81,232		69,608		56,480
	RR	RR	CI	RR	CI	RR	CI
CVD	1.00	1.65	(1.34; 1.95)	1.65	(1.40; 1.93)	1.44	1.23; 1.68)
Cases	261	311		386		400
Heart	1.00	1.71	(1.38; 2.12)	1.71	(140; 2.10)	1.54	(1.26 1.88)
Cases	162	188		236		257
Stroke	1.00	1.36	(1.01; 1.84)	1.19	(0.89; 1.59)	1.03	(0.77; l.38)
Cases	88	94		101		103
Exposed area, with dose estimates
Person-years	72,545	62,408		51,695		37,110
	RR	RR	CI	RR	CI	RR	CI
CVD	1.00	l.56	(1.34; 1.82)	1.57	(1.35; 1.82)	2.14	(1.85 2.47)
Cases	326	373		375		136
Heart	1.00	1.46	(1.19; l.78)	1.56	(128; 1.90)	2.28	(1.89; 2.74)
Cases	194	206		217		328
Stroke	1.00	1.58	(1.21; 2.07)	1.51	(1.15; 1.98)	2.05	(1.59; 2.65)
Cases	103	117		113		161
Exposed area, without dose estimates
Person-years	20,051	16,861		13,884		9,690
	RR	RR	CI	RR	CI	RR	CI
CVD	1.00	1.17	(0.84; 1.63)	0.94	(0.79; 1.28)	1.40	(1.06; 1.85)
Cases	88	64		85		135
Heart	1.00	1.22	(0.80; 1.85)	0.92	(0.62; 1.36)	1.17	(0.96; 1.95)
Cases	54	41		52		84
Stroke	1.00	1.14	(0.64; 2.04	0.84	(0.49; 1.45)	1.24	(0.75; 2.03)
Cases	30	21		25		39