Workplace
Table 1 Sociodemographic and work characteristics among firefighters who participated in voluntary serological COVID-19 antibody test (n=203)
COVID-19 antibody test result
Total sample N N (%)*
Positive (IgG, IgM or IgG/IgM) n (%)*
Negative n (%)*
Characteristics
P value
Total
203 (100.0)
18 (8.9)
185 (91.1)
Age groups
0.677
21–30 years old 31–40 years old 41–50 years old 51 years and older
33 (16.3) 51 (25.1) 67 (33.0) 52 (25.6)
2 (11.1) 6 (33.3) 7 (38.9) 3 (16.7)
31 (16.8) 45 (24.3) 60 (32.4) 49 (26.5)
Sex
0.328
Male
188 (93.5)
16 (88.9) 2 (11.1)
172 (94.0)
Female
13 (6.5)
11 (6.0)
Race
0.899
White
154 (78.2)
15 (83.3) 0 (0.0) 1 (5.6) 2 (11.1)
139 (77.7)
Black or African–American
9 (4.6) 8 (4.1)
9 (5.0) 7 (3.9)
Multi-race
Other
26 (13.2)
24 (13.4)
Ethnicity
0.57
Hispanic/Latinx
149 (75.6) 48 (24.4)
15 (83.3) 3 (16.7)
134 (74.9) 45 (25.1)
Non-Hispanic/non-Latinx
Marital status
0.721
Married/unmarried couple Divorced, widowed, separated
139 (72.4) 21 (10.9) 32 (16.7)
12 (66.7) 2 (11.1) 4 (22.2)
127 (73.0) 19 (10.9) 28 (16.1)
Single
Educational attainment
0.767
High school/GED
16 (8.3)
1 (5.9)
15 (8.5)
Some college
135 (69.9) 42 (21.8)
11 (64.7) 5 (29.4)
124 (70.5) 37 (21.0)
College graduate
Body mass index
0.154
Normal weight
32 (16.9) 101 (53.4) 56 (29.6)
5 (31.3) 9 (56.3) 2 (12.5)
27 (15.6) 92 (53.2) 54 (31.2)
Overweight
Obese
Influenza shot in the past 12 months
0.027
Yes No
35 (18.9) 150 (81.1)
0 (0.0)
35 (21.0) 132 (79.0)
18 (100.0)
Smoking status
0.543
Current smoker Former smoker Never smokers
0 (0.0) 8 (4.6)
0 (0.0) 1 (6.3)
0 (0.0) 7 (4.4)
167 (95.4)
15 (93.8)
152 (95.6)
Career firefighter tenure
0.419
Years±SD
15.9 ± 9.2
14.1 ± 8.1
16.0 ± 9.3
Time at current department
0.732
Years±SD
15.3 ± 9.1
14.6 ± 8.4
15.3 ± 9.1
Current rank
0.129
Firefighter/paramedic/EMT
79 (40.7) 30 (15.5)
4 (22.2) 5 (27.8) 1 (5.6) 7 (38.9) 0 (0.0) 1 (5.6)
75 (42.6) 25 (14.2)
Driver/operator
Inspector/fire investigator
7 (3.6)
6 (3.4)
Lieutenant
47 (24.2) 18 (9.3) 13 (6.7)
40 (22.7) 18 (10.2) 12 (6.8)
Captain
Battalion/deputy/division chief Any symptoms in the past 2 weeks
0.064
Yes No
18 (9.0)
4 (22.2) 14 (77.8)
14 (7.7)
181 (91.0)
167 (92.3)
Days with symptoms since onset
0.005
Average days±SD
5.7 ± 4.3
11.7 ± 2.5
4.6 ± 3.7
COVID-19 case contact past 2 weeks at work
0.653
Yes No
93 (51.7) 43 (23.9) 44 (24.4)
7 (43.8) 5 (31.3) 4 (25.0)
86 (52.4) 38 (23.2) 40 (24.4)
Not sure
continued
Caban-Martinez AJ, et al . Occup Environ Med 2020; 77 :857–861. doi:10.1136/oemed-2020-106676
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