The use of public transport and contraction of SARS-CoV-2 in a large prospective cohort in Norway

BMC Infectious Diseases

Table 1 Descriptive statistics (n /%) on covariates in SARS CoV-2 positive cases (n = 1069) and non-positive SARS CoV-2 participants (n = 120,305)^a

Variable	SARS-CoV-2 positive cases		Non-positive SARS-CoV-2 participants
Variable	Mean	SD	Mean	SD
Calendar time (date)	31.03.2020	9.5	01.04.2020	12.5
Age (years)	43	13.7	46	13.7
	n	%	n	%
P-value^b	< 0.0001
18–25	129	12	6151	5
26–30	117	11	10,237	8
31–35	116	11	13,313	11
36–40	114	11	13,989	12
41–45	123	12	14,728	12
46–50	130	12	15,595	13
51–55	126	12	14,168	12
56–60	101	9	10,712	9
61–65	54	5	9076	8
66–70	26	2	6722	6
> 70	30	3	5300	4
Missing	3	0	314	0
	n	%	n	%
Sex
Men	318	30	36,460	30
Women	749	70	83,552	70
Missing	2	0.2	293	0.2
P-value^c	0.86
Income (NOK per household and year)
Below 299,999	47	4	4058	3
300,000–599,999	165	15	19,969	17
600,000–1,000,000	272	26	31,305	26
More than 1,000,000	401	38	44,251	37
Missing	184	17	20,722	17
P-value^c	0.35
Fitness
Very fit	390	36	39,709	33
Fairly fit	599	56	69,641	58
In bad shape	80	8	10,864	9
Missing	0	0	91	0
P-value^c	0.04
Smoking habits
Never	577	54	63,044	52
Former	406	38	45,549	38
Current	61	6	9111	8
Missing	25	2	2602	2
P-value ^c	0.14
Underlying medical conditions^d
No	626	59	63,425	53
Yes	283	26	36,792	30
Missing	160	15	20,088	17
P-value^c	0.001

^aThe statistical analyses were also adjusted for municipality (358 different municipalities)
^bMann-Whitney test comparing equality of medians
^cChi-squared test
^dChronic heart disease, high blood pressure, chronic lung disease (not asthma), asthma, diabetes, receiving immunodeficiency treatment, cancer (under treatment)

ISSN: 1471-2334