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

Table 1 Chi-squared tests comparing swab positivity and health conditions

Parameter	Negative1	Positive1	P value
Diseases in general
At least one disease	867 (94.9)	47 (5.1)	< 0.05
No disease	421 (91.7)	38 (8.3)
Psychiatric
At least one disease	435 (96.2)	17 (3.8)	< 0.05
No disease	853 (92.6)	68 (7.4)
Infectious
At least one disease	58 (93.6)	4 (6.4)	0.9
No disease	1230 (93.8)	81 (6.2)
Cardiovascular
At least one disease	157 (93.5)	11 (6.5)	0.8
No disease	1131 (93.9)	74 (6.1)
Endocrine and immune system
At least one disease	138 (92)	12 (8)	0.3
No disease	1150 (94)	73 (6)
Digestive system
At least one disease	165 (97.6)	4 (2.4)	< 0.05
No disease	1123 (93.3)	81 (6.7)
Respiratory system
At least one disease	65 (100)	0 (0)	< 0.05
No disease	1223 (93.5)	85 (6.5)
Musculoskeletal and connective apparatus
At least one disease	97 (95.1)	5 (4.9)	0.6
No disease	1191 (93.7)	80 (6.3)
Genitourinary system
At least one disease	56 (94.9)	3 (5.1)	0.7
No disease	1232 (93.8)	82 (6.2)
Nervous system
At least one disease	64 (90.1)	7 (9.9)	0.2
No disease	1224 (94)	78 (6)
Traumas
At least one trauma or poisoning	33 (94.3)	2 (5.7)	0.9
No traumas or poisoning	1255 (93.8)	83 (6.2)
Blood organs
At least one disease	11 (100)	0 (0)	0.4
No disease	1277 (93.8)	85 (6.2)
Tumour
At least one tumour	20 (95.2)	1 (4.8)	0.8
No tumours	1268 (93.8)	84 (6.2)
Cutaneous and subcutaneous
At least one disease	49 (96.1)	2 (3.9)	0.5
No disease	1239 (93.7)	83 (6.3)

¹Data are n (%).

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.