Table 1.
Baseline characteristics and results of serological studies.
| Overall (n = 423) |
Negative test (n = 260) |
Positive test (n = 163) |
p | |
|---|---|---|---|---|
| Age (years)* | 44.26 ± 9.93 | 43.26 ± 9.94 | 46.72 ± 9.92 | 0.001 |
| Male sex (%) | 269 (63.6) | 158 (60.8) | 111 (68.1) | 0.146 |
| Smoking habits | ||||
| Current | 92 (21.7) | 69 (26.5) | 23 (14.1) | 0.002 |
| Former | 76 (18.0) | 35 (13.5) | 41 (25.1) | 0.003 |
| Never | 255 (60.3) | 156 (60.0) | 99 (60.7) | 0.919 |
| Area of residence (%) | ||||
| Bergamo | 130 (30.7) | 81 (31.2) | 49(30.1) | 0.829 |
| Nembro | 30 (7.1) | 13 (5.0) | 17(10.4) | 0.050 |
| Other part of the province | 263 (62.2) | 166 (63.8) | 97(59.5) | 0.410 |
| Pre-existing medical conditions (%) | 237 (56.0) | 145 (55.8) | 92 (56.4) | 0.920 |
|
Contact with patients positive for COVID-19 (%) |
65 (15.4) | 37 (14.2) | 28 (17.2) | 0.410 |
| Contact with subjects with symptoms attributable to COVID-19 (%) | 180 (42.6) | 102 (39.2) | 78 (47.9) | 0.087 |
⁎
mean±SD.