BMC Women's Health

Table 2 The results of comparing the frequency of underlying diseases between the study groups

From: Does endometriosis increase susceptibility to COVID-19 infections? A case–control study in women of reproductive age

	Case group (N = 507)		Control group (N = 520)		p-value
	Frequency	Percent	Frequency	Percent	p-value
None	408	80.5	376	72.3	0.002^a
Thyroid disease	5	0.98	3	0.57	0.501^b
Diabetes mellitus	11	2.2	23	4.6	0.038^a
Cardiovascular disease	2	0.4	36	7.2	< 0.001^a
Hypertension	13	2.6	42	8.4	< 0.001^a
Asthma	1	0.2	6	1.2	0.124^b
Allergy	13	2.6	23	4.6	0.057^a
Cancer	5	1.0	11	2.2	0.097^a
Sinusitis	6	1.2	2	0.4	0.173^b
Lupus erythematosus	2	0.4	6	1.2	0.156^b
Rheumatoid arthritis	4	0.8	26	5.2	< 0.001^b
Other	18	3.6	24	4.8	0.314^a

Results of: ^aChi-square test, ^bFisher’s exact test

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