Table 1 Characteristics of participants
Phase 1 | Phase 2 | Phase 3 | Phase 4 | Total | |
|---|---|---|---|---|---|
(n = 1769) | (n = 2887) | (n = 3250) | (n = 1943) | (N = 9849) | |
Demographic | |||||
Age, mean (SD) | 49.67 (19.85) | 46.33 (20.90) | 43.12 (20.78) | 44.04 (22.35) | 45.42 (21.10) |
Sex | |||||
Male | 709 (40.1%) | 1123 (38.8%) | 1274 (39.1%) | 785 (40.3%) | 3891 (39.5%) |
Female | 1059 (59.9%) | 1770 (61.2%) | 1978 (60.9%) | 1163 (59.7%) | 5970 (60.5%) |
Comorbidity | |||||
Charlson comorbidity index, mean (SD) | 0.99 (1.37) | 0.82 (1.35) | 0.61 (1.14) | 0.72 (1.24) | 0.76 (1.27) |
Obesity (Yes) | 398 (24.0%) | 580 (22.1%) | 579 (19.5%) | 409 (23.2%) | 1966 (21.8%) |
Health behaviors (Yes/No) | |||||
Smoking (Yes) | 563 (33.2%) | 819 (30.1%) | 849 (28.2%) | 539 (30.3%) | 2770 (30.1%) |
Drinking (Yes) | 965 (61.2%) | 1623 (66.0%) | 1933 (70.7%) | 992 (63.2%) | 5513 (66.1%) |
Illicit drug use (Yes) | 331 (21.4%) | 574 (24.1%) | 689 (25.8%) | 344 (22.5%) | 1938 (23.8%) |
Symptoms (Yes/No) | |||||
Fever (Yes) | 267 (15.1%) | 0 (0%) | 0 (0%) | 0 (0%) | 267 (2.7%) |
Unexplained muscle aches (Yes) | 387 (21.9%) | 632 (21.9%) | 481 (14.8%) | 257 (13.2%) | 1757 (17.8%) |
ENT (Yes) | 99 (5.6%) | 152 (5.3%) | 120 (3.7%) | 76 (3.9%) | 447 (4.5%) |
Eye symptom (Yes) | 40 (2.3%) | 72 (2.5%) | 63 (1.9%) | 35 (1.8%) | 210 (2.1%) |
Respirator symptom (Yes) | 831 (47.0%) | 840 (29.1%) | 809 (24.9%) | 474 (24.4%) | 2954 (30.0%) |
URI symptom (Yes) | 804 (45.5%) | 1192 (41.3%) | 1128 (34.7%) | 583 (30.0%) | 3707 (37.6%) |
GI symptom (Yes) | 329 (18.6%) | 403 (14.0%) | 350 (10.8%) | 196 (10.1%) | 1278 (13.0%) |
Altered mental (Yes) | 5 (0.3%) | 8 (0.3%) | 5 (0.2%) | 3 (0.2%) | 21 (0.2%) |