Table 1.

Incidence of patients with myocarditis by the number of 100,000 residents in Poland in a given age group in the years 2011–2019.

Age Group (Years)	Year									p Value a
	2011	2012	2013	2014	2015	2016	2017	2018	2019
0–5	4.27	4.06	4.53	4.14	3.30	2.99	3.24	3.06	2.13	0.000
6–10	1.50	0.99	2.09	1.59	1.09	2.13	1.15	2.42	1.54	0.002
11–15	1.81	1.87	3.37	3.44	3.05	3.45	3.59	3.44	2.88	0.002
16–20	8.79	8.95	11.55	10.60	11.39	14.07	12.51	12.77	12.83	0.000
21–30	7.05	8.72	8.52	10.35	10.41	11.18	10.91	11.09	11.08	0.000
31–40	6.71	7.22	7.35	8.08	8.79	8.39	8.72	8.42	8.99	0.000
41–50	2.94	3.39	4.61	3.89	4.82	4.83	4.82	5.71	5.12	0.000
51–60	3.55	3.41	3.66	3.50	3.00	3.61	3.56	3.91	3.73	0.506
61–70	4.85	3.93	4.51	3.39	3.66	3.91	3.36	3.51	3.29	0.001
71–80	6.85	6.42	6.32	5.10	5.72	4.50	2.87	3.78	3.90	0.000
81+	7.14	7.63	7.66	6.15	6.07	5.11	3.60	3.75	3.61	0.000

^a A Chi-square test for the independence of the number of patients with myocarditis in a given age group by year.