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Table 1 Estimates of the secondary attack rates to model the NNI for each category

From: Number needed to isolate - a new population health metric to quantify transmission reductions from isolation interventions for infectious diseases

Category

SAR (95% CI)

Setting

 

Households

13.36 (12.24 to 14.55)

Community

1.3 (1.09 to 1.53)

Symptomaticity

 

Symptomatic

6.1 (4.33 to 8.3)

Asymptomatic

3.64 (3.33 to 3.98)

Exposure

 

Congregation

9.71 (8.79 to 10.68)

No congregation

2.19 (1.92 to 2.5)

  1. 95% CI = 95% confidence interval. Brackets are the 95% confidence intervals (lower limit to upper limit). SAR = secondary attack rate. NNI = number needed to isolate. Exact data calculated from Karumanagoundar et al. 2021 [2]
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Population Health Metrics

ISSN: 1478-7954