Table 2.

Baseline characteristics.

Demographic measure	Total study sample (861)	Group 1: vaccinated (821)	Group 2: unvaccinated (40)
Age, n (%)
30 or younger	60 (7.0)	57 (6.9)	3 (7.5)
31-45	254 (29.5)	232 (28.3)	22 (55.0)
46-60	270 (31.4)	262 (31.9)	8 (20.0)
61 and older	271 (31.4)	265 (32.3)	6 (15.0)
Not reported	6 (0.7)	5 (0.6)	1 (2.5)
Race, n (%)
Asian	212 (24.6)	209 (25.5)	3 (7.5)
Black	67 (7.8)	51 (6.2)	16 (40.0)
White	565 (65.6)	546 (66.5)	19 (47.5)
Other	5 (0.6)	5 (0.6)	0 (0.0)
Not reported	12 (1.4)	10 (1.2)	2 (5.0)
Hispanic/Latino/Spanish Origin, n (%)
Yes	55 (6.4)	49 (6.0)	6 (15.0)
No	797 (92.6)	765 (93.2)	32 (80.0)
Not reported	9 (1.0)	7 (0.8)	2 (5.0)
Gender, n (%)
Female	505 (58.7)	471 (57.3)	34 (85.0)
Male	349 (40.5)	344 (41.9)	5 (12.5)
Non-binary/third gender/other	3 (0.3)	3 (0.4)	0 (0.0)
Not reported	4 (0.5)	3 (0.4)	1 (2.5)
Department, n (%)
Family medicine	34 (3.9)	32 (3.9)	2 (5.0)
Internal medicine/department of medicine	427 (49.6)	419 (51.0)	8 (20.0)
Obstetrics & gynecology	71 (8.3)	65 (7.9)	6 (15.0)
Pediatrics	244 (28.3)	231 (28.2)	13 (32.5)
Surgery/plastic surgery	66 (7.7)	60 (7.3)	6 (15.0)
Other	19 (2.2)	14 (1.7)	5 (12.5)
Flu shot status, n (%)
Every year	766 (89.0)	753 (91.7)	13 (32.5)
Most/some years	78 (9.0)	62 (7.6)	16 (40.0)
Never	17 (2.0)	6 (0.7)	11 (27.5)
Medical comorbidities associated with Covid-19, n (%)
Yes	267 (31.0)	250 (30.4)	17 (42.5)
No	575 (66.8)	558 (68.0)	17 (42.5)
Not reported	19 (2.2)	13 (1.6)	6 (15.0)
Role, n (%)
Non-clinical	111 (12.9)	92 (11.2)	19 (47.5)
Nurse	70 (8.1)	66 (8.0)	4 (10.0)
Physician	568 (66.0)	555 (67.6)	13 (32.5)
Trainee	80 (9.3)	80 (9.8)	0 (0.0)
Other clinical	14 (1.6)	14 (1.7)	0 (0.0)
Other (not classifiable)	18 (2.1)	14 (1.7)	4 (10.0)