Table 1.

Characteristics of the study participants by SARS-CoV-2 variant type or by health outcomes

	Entire period	SARS-CoV-2 variant type			P a	Health outcomes				P b
		Alpha	Delta	Omicron		None	Extension of recovery period	Hospitalization	Severe health consequences
	n = 24,314	n = 1,640	n = 3,121	n = 19,553		n = 20,500	n = 1,457	n = 2,102	n = 255
Gender: men	48.5%	52.8%	53.1%	47.4%	<0.001	48.1%	47.6%	50.9%	61.6%	<0.001
Age: 65 years or older	14.9%	19.4%	6.4%	15.9%	<0.001	11.4%	15.0%	43.1%	63.9%	<0.001
Population size: ≥120,000	20.5%	21.3%	23.0%	20.0%	<0.001	20.4%	19.7%	22.3%	16.2%	0.437
No. of aggravation risk factors: ≥1	27.7%	39.3%	34.5%	25.7%	<0.001	24.0%	29.1%	57.7%	74.0%	<0.001
No. of symptoms at diagnosis: ≥3	20.8%	15.1%	22.5%	21.0%	<0.001	20.5%	20.2%	23.5%	24.9%	0.001
Vaccination status: unvaccinated	30.3%	98.4%	84.6%	16.0%	<0.001	25.6%	55.5%	56.7%	54.9%	<0.001

^aChi-squared test. ^bCochran-Armitage test.