Table 1 Demographic features of the participants by the place of contact with COVID-19 patients.

From: COVID-19 transmission in group living environments and households

 

Contact at dormitory

Contact at home

Contact at other places outside residence

Close contact

Lower-risk contact

n

120

1144

1034

2252

Male, n (%)*

105 (87.5%)

485 (42.4%)

573 (55.4%)

1168 (51.9%)

Age †

24 (22–27) years

36 (15–54) years

23 (15–44) years

15 (6–28) years

0–17 years, n (%)*

0 (0.0%)

333 (29.1%)

389 (37.6%)

1358 (60.3%)

18–64 years, n (%)*

119 (99.2%)

642 (56.1%)

561 (54.3%)

824 (36.6%)

65 + years, n (%)*

1 (0.8%)

169 (14.8%)

84 (8.1%)

70 (3.1%)

Close contact, n (%)

11 (9.2%)

1134 (99.1%)

1034 (100.0%)

0 (0.0%)

Lower risk contact, n (%)

109 (90.8%)

10 (0.9%)

0 (0.0%)

2252 (100.0%)

SARS-CoV-2 RT-PCR test positivity, n (%)*

Total

33 (27.5%)

144 (12.6%)

117 (11.3%)

61 (2.7%)

Non-adult (< 18 years old)

-

43/333 (12.9%)

11/389 (2.8%)

12/1358 (0.9%)

Adult (≥ 18 years old)

33/120 (27.5%)

101/811 (12.5%)

106/645 (16.4%)

49/894 (5.5%)

  1. Close contact was defined by the existence of the following four criteria: (1) contact with a patient between 2 days before and 14 days after the onset of symptoms, (2) no usage of masks, (3) distance within 1 m, and (4) more than 15 min of contact. Lower risk contact was defined as presence in the same facility as COVID-19 patients, but without fulfilling the above-described criteria of close contact.
  2. COVID-19, coronavirus disease; n.a., not available; RT-PCR, reverse transcription-polymerase chain reaction; SARS-CoV-2, severe acute respiratory syndrome coronavirus-2.
  3. *Numbers and percentages in the column (i.e., among subjects in each contact level group); † median and interquartile range (25–75 percentiles).
Back to article page