Table 7. Gender-specific incidence of acute myocardial infarction per day-of-the-week, with sub-group analyses for quartiles of age.

Day-of-the-week	Overall	Statistical parameter	Male	Statistical parameter	Female	Statistical parameter
Age group: ≤55
Monday	63	X 2 = 10.340 p = 0.111	56	X 2 = 9.170 p = 0.164	7	X 2 = 7.556 p = 0.273
Tuesday	60		53		7
Wednesday	59		57		2
Thursday	38		35		3
Friday	42		38		4
Saturday	52		48		4
Sunday	57		48		9
Age group: 56–65
Monday	52	X 2 = 2.128 p = 0.908	46	X 2 = 2.227 p = 0.898	6	X 2 = 4.212 p = 0.648
Tuesday	51		40		11
Wednesday	56		44		12
Thursday	53		41		12
Friday	51		42		9
Saturday	49		43		6
Sunday	62		52		10
Age group: 66–74
Monday	58	X 2 = 6.350 p = 0.385	47	X 2 = 5.858 p = 0.439	11	X 2 = 8.133 p = 0.228
Tuesday	69		48		21
Wednesday	65		48		17
Thursday	55		42		13
Friday	55		35		20
Saturday	52		43		9
Sunday	46		32		14
Age group: ≥75
Monday	51	X 2 = 17.826 p = 0.007	32	X 2 = 10.760 p = 0.096	19	X 2 = 8.990 p = 0.174
Tuesday	38		25		13
Wednesday	31		23		8
Thursday	52		36		16
Friday	51		37		14
Saturday	64		43		21
Sunday	35		25		10