Table 1 Subject characteristics in the two participating cohorts. Numbers presented as count (percentage) except where otherwise 570 noted. Hypertension information was not available for the Mount Sinai Biobank cohort.
|  | BQC19 (n = 333) | Mount Sinai Biobank (n = 247) | ||
|---|---|---|---|---|
Cases (n = 91) | Controls (n = 242) | Cases (n = 119) | Controls (n = 128) | |
Age in years (mean) | 67.2 | 66.2 | 64.8 | 59.2 |
Female sex | 35 (38.5%) | 133 (55.0%) | 49 (41.2%) | 57 (44.5%) |
Hospital site | – | – | – | – |
 Centre Hospitalier de l’Université de Montréal | 32 (35.2%) | 22 (9.1%) | – | – |
 Jewish General Hospital | 59 (64.8%) | 220 (90.1%) | – | – |
 Mount Sinai Hospital | – | – |  |  |
COVID-19 positive | 91 (100%) | 202 (83.5%) | 119 (100%) | 128 (100%) |
Diabetes | 38 (41.8%) | 71 (29.3%) | 30 (25.2%) | 32 (25.0%) |
Chronic obstructive pulmonary disease | 16 (17.6%) | 27 (11.2%) | 14 (11.8%) | 8 (6.3%) |
Chronic kidney disease | 16 (17.6%) | 24 (9.9%) | 15 (12.6%) | 26 (20.3%) |
Congestive heart failure | 13 (14.3%) | 28 (11.6%) | 14 (11.8%) | 11 (8.6%) |
Hypertension | 60 (65.9%) | 134 (55.4%) | – | – |
Liver disease | 2 (2.2%) | 4 (1.7%) | 6 (5.0%) | 4 (3.1%) |
Smoking status | ||||
 Current smoker | 5 (5.5%) | 6 (2.5%) | 10 (8.4%) | 9 (7.0%) |
 Ex-smoker | 11 (12.1%) | 30 (12.4%) | 32 (26.9%) | 35 (27.3%) |
 Never smoker | 39 (42.9%) | 172 (71.1%) | 47 (39.5%) | 65 (50.8) |
 Don’t know | 36 (39.6%) | 34 (14.0%) | 30 (25.2%) | 19 (14.8%) |