Prevalence and features of SARS-CoV-2 infection in prisons in Tuscany

Table 2 Comparison between positive swab incidence rate in prison and in the general population in Tuscany

Parameter	SIR	95%CI
Total	0.7	0.6-0.9
Age in yr
18-29	0.4	0.2-0.8
30-39	0.8	0.5-1.1
40-49	0.8	0.5-1.1
50-59	0.6	0.4-1
60 +	1	0.5-1.8
Nationality
Italian	0.3	0.2-0.5
Foreign	0.5	0.3-0.7

CI: Confidence interval; SIR: Standardized incidence ratio.