Table 2.
Comparison of the average number of high-risk and low-risk contacts, with respect to the type of index case, in the hospital from March to August 2020.
| Types of patients and areas | Number of cases | Number of contacts, mean (SD) | t testa (df) or ANOVAb test (df) | P value | ||||||||
| Type of patient | ||||||||||||
|
|
High-risk contact | 4.741 (2)c | .009 | |||||||||
|
|
|
Inpatient department patients | 240 | 6.61 (13.895) |
|
|
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|
|
|
Outpatient department patients | 29 | 0.22 (0.698) |
|
|
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|
|
|
Health care workers | 91 | 4.02 (5.653) |
|
|
||||||
|
|
Low-risk contact | 8.527 (2)c | .002 | |||||||||
|
|
|
Inpatient department patients | 240 | 10.81 (11.754) |
|
|
||||||
|
|
|
Outpatient department patients | 29 | 3.07 (2.541) |
|
|
||||||
|
|
|
Health care workers | 91 | 8.12 (6.789) |
|
|
||||||
| Type of area | ||||||||||||
|
|
High-risk contact | −10.853 (258)d | <.001 | |||||||||
|
|
|
COVID-19 area | 163 | 0.27 (1.207) |
|
|
||||||
|
|
|
Non–COVID-19 area | 97 | 15.84 (18.268) |
|
|
||||||
|
|
Low-risk contact | −7.803 (258)d | <.001 | |||||||||
|
|
|
COVID-19 area | 163 | 5.93 (5.544) |
|
|
||||||
|
|
|
Non–COVID-19 area | 97 | 16.19 (15.188) |
|
|
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aA 2-tailed unpaired t test.
bANOVA: analysis of variance.
cAnalysis of variance test value.
d2-tailed unpaired t test value.