Seasonal dynamics of myocardial infarctions in regions with different types of a climate: a meta-analysis

Kuzmenko, Nataliya V.; Tsyrlin, Vitaliy A.; Pliss, Mikhail G.; Galagudza, Mikhail M.

doi:10.1186/s43044-022-00322-5

The Egyptian Heart Journal

Table 3 Dependence of myocardial infarction risk on the season

From: Seasonal dynamics of myocardial infarctions in regions with different types of a climate: a meta-analysis

Compared seasons		Number of studies	Total	Odds ratio	I²%	Overall effect test
Season 1 / total	Season 2 / total	Number of studies	Total	Odds ratio	I²%	Z	P
All
Winter / 1,055,200	Summer / 969,524	26	4,096,659	1.16 [1.08, 1.25]	99	4.17	0.0001
Winter / 1,055,200	Spring / 1,047,486	25	4,089,906	1.04 [0.98, 1.10]	99	1.18	0.24
Winter / 1,055,200	Autumn / 1,023,992	25	4,089,906	1.07 [1.03, 1.11]	97	3.63	0.0003
Autumn / 1,023,992	Summer / 969,524	25	4,089,906	1.08 [1.03, 1.14]	99	3.11	0.002
Spring / 1,047,486	Summer / 969,524	25	4,089,906	1.13 [1.09, 1.18]	98	6.24	0.00001
Spring / 1,047,486	Autumn / 1,023,992	25	4,089,906	1.04 [1.00, 1.08]	98	1.97	0.05
Men
Winter / 637,493	Summer / 593,271	10	2,494,030	1.14 [1.03, 1.26]	100	2.60	0.009
Winter / 637,493	Spring /639818	10	2,494,030	1.03 [0.97, 1.10]	99	0.93	0.35
Winter / 637,493	Autumn / 623,448	10	2,494,030	1.03 [0.99, 1.06]	96	1.52	0.13
Autumn / 623,448	Summer / 593,271	10	2,494,030	1.12 [1.03, 1.21]	99	2.75	0.006
Spring / 639,818	Summer / 593,271	10	2,494,030	1.10 [1.05, 1.16]	98	3.66	0.0003
Spring / 639,818	Autumn / 23,448	10	2,494,030	0.99 [0.94, 1.04]	98	0.41	0.68
Women
Winter / 388,686	Summer / 353,702	10	1,502,478	1.21 [1.10, 1.34]	99	3.91	0.0001
Winter / 388,686	Spring / 382,943	10	1,502,478	1.07 [1.00, 1.15]	98	1.87	0.06
Winter / 388,686	Autumn / 377,147	10	1,502,478	1.03 [0.98, 1.07]	96	1.06	0.29
Autumn / 377,147	Summer / 353,702	10	1,502,478	1.18 [1.10, 1.26]	98	4.49	0.00001
Spring / 382,943	Summer / 353,702	10	1,502,478	1.11 [1.06, 1.17]	97	4.02	0.0001
Spring / 382,943	Autumn / 377,147	10	1,502,478	0.96 [0.90, 1.01]	98	1.53	0.13
Young and middle-aged people
Winter / 396,959	Summer / 375,442	7	1,562,568	1.19 [1.03, 1.37]	100	2.34	0.02
Winter / 396,959	Spring / 402,294	7	1,562,568	1.02 [0.92, 1.12]	99	0.32	0.75
Winter / 396,959	Autumn / 387,873	7	1,562,568	1.03 [0.97, 1.08]	96	0.99	0.32
Autumn / 387,873	Summer / 375,442	7	1,562,568	1.15 [1.03, 1.29]	99	2.43	0.02
Spring / 402,294	Summer / 375,442	7	1,562,568	1.13 [1.06, 1.20]	97	3.73	0.0002
Spring / 402,294	Autumn / 387,873	7	1,562,568	1.00 [0.93, 1.08]	98	0.04	0.97
Old people (≥ 65 years old)
Winter / 514,066	Summer / 457,247	7	1,972,942	1.30 [1.14, 1.48]	100	3.85	0.0001
Winter / 514,066	Spring / 505,756	7	1,972,942	1.08 [0.97, 1.21]	99	1.42	0.16
Winter / 514,066	Autumn / 495,873	7	1,972,942	1.07 [1.02, 1.11]	94	3.02	0.003
Autumn / 495,873	Summer / 457,247	7	1,972,942	1.22 [1.09, 1.36]	99	3.50	0.0005
Spring / 505,756	Summer / 457,247	7	1,972,942	1.17 [1.12, 1.22]	94	7.21	0.00001
Spring / 505,756	Autumn / 495,873	7	1,972,942	0.98 [0.91, 1.06]	99	0.44	0.66

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