Table 2

Number of AMI cases, population at risk, and the AMI incidence per year by age and water hardness among 35 to 74 year old men in Finland in 1983, 1988, and 1993 (pooled data)

Age	Water hardness (°dH)
	<1.7	(n = 688)	AMI incidence	1.71< = <5.2	(n = 1389)	AMI incidence	⩾5.2	(n = 692)	AMI incidence
	AMI cases	Population at risk	AMI incidence	AMI cases	Population at risk	AMI incidence	AMI cases	Population at risk	AMI incidence
35–39	49	68730	71.3	282	506395	55.7	9	17615	51.1
40–44	124	62520	198.3	675	468014	144.2	20	16430	121.7
45–49	180	55485	324.4	1144	409953	279.1	47	14447	325.3
50–54	332	50500	657.4	1662	350975	473.5	63	12443	506.3
55–59	447	51842	862.2	2446	341606	716	71	12189	582.5
60–64	487	52081	935.1	2820	333483	845.6	97	12030	806.3
65–69	533	47996	1110.5	3139	306651	1023.6	101	11402	885.8
70–74	606	42334	1431.5	3181	271337	1172.3	105	10394	1010.2
Age standardised	2758	431488	562.1	15349	2988414	469.5	513	106950	437.6