Table 1 Main characteristics of the individuals enrolled in the 5 study groups.
GROUP | 1 | 2 | 3 | 4 | 5 | Overall | p value | |||
|---|---|---|---|---|---|---|---|---|---|---|
N. individuals | (N = 120) | (N = 89) | (N = 128) | (N = 246) | (N = 406) | (N = 989) | ||||
Male (%) | 58 (48) | 51 (57) | 56 (44) | 58 (24) | 179 (44) | 402 (41) | P < 0.012 | |||
Age class-years (%) | P < 0.012 | |||||||||
< 50 | 50 (42) | 44 (50) | 75 (59) | 169 (69) | 224 (55) | 562 (57) | ||||
50–65 | 49 (41) | 27 (30) | 36 (28) | 74 (30) | 117 (29) | 303 (31) | ||||
> 65 | 21 (17) | 18 (20) | 17 (13) | 3 (1) | 64 (16) | 123(12) | ||||
Type of occupation (%) | P < 0.012 | |||||||||
Physician | 8 (7) | 3 (3) | 8 (6) | 38 (15) | 1 (0) | 58 (6) | ||||
Manager | 8 (7) | 7 (8) | 17 (13) | 6 (2) | 38 (9) | 76 (8) | ||||
Retired Individual | 21 (17) | 17 (19) | 14 (11) | 0 (0) | 83 (20) | 135 (13) | ||||
Researchers/student | 3 (3) | 10 (11) | 20 (16) | 62 (25) | 76 (19) | 171 (17) | ||||
Nurse | 28 (23) | 12(14) | 5 (4) | 70 (29) | 2 (1) | 117 (12) | ||||
Administrative personnel | 33 (28) | 19 (21) | 40 (31) | 29 (12) | 134 (33) | 255 (26) | ||||
Others | 15 (12) | 12 (14) | 17 (13) | 39 (16) | 55 (14) | 138 (14) | ||||
Not reported | 4 (3) | 9 (10) | 7 (6) | 2 (1) | 17 (4) | 39 (4) | ||||
Environmental and professional risk factors | P < 0.012 | |||||||||
None | 38 (32) | 41 (46) | 8 (6) | 68 (28) | 278 (69) | 433 (44) | ||||
COVID-19 close contact | 29 (24) | 10 (11) | 98 (77) | 4 (2) | 4 (1) | 145 (15) | ||||
Healthcare worker* | 26 (22) | 9 (11) | 2 (1) | 106 (43) | 12 (3) | 155 (15) | ||||
Travel to/from high-risk areas | 4 (3) | 4 (4) | 1 (1) | 2 (1) | 25 (6) | 36 (4) | ||||
Homeless/other | 11 (9) | 15 (17) | 5 (4) | 28 (11) | 82 (20) | 141 (14) | ||||
More than one | 12 (10) | 10 (11) | 14 (11) | 38 (15) | 5 (1) | 79 (8) | ||||
