Adjusted prevalence ratio for factors of infectivity.
Factors
aPR (95% CI)
value
Age of index case
93
1 (1, 1.02)
0.01
Age of contact
<18 years
123
1
18-44 years
146
1.3 (0.66, 2.46)
0.476
45-59 years
23
1.5 (0.72, 3.33)
0.264
≥60 years
14
1.3 (0.58, 2.73)
0.557
Symptom status of index case
Symptomatic
233
1
Asymptomatic
73
0.8 (0.66, 1.04)
0.107
Relationship
Spouse
47
1
Relatives
83
0.9 (0.63, 1.3)
0.599
Child
99
1.3 (0.91, 1.94)
0.139
Parents/grandparents
31
1.3 (0.78, 2.01)
0.352
Others (neighbors/friends/employers)
46
1.3 (0.91, 1.82)
0.152
Vaccination (contacts)
Yes
179
1
No
127
1.4 (0.72, 2.58)
0.335
aPR: adjusted prevalence ratio. 1: reference value The variables with value ≤ 0.2 from unadjusted regression analysis were taken into consideration for this model.
