TABLE 1. Demographic characteristics, in-class behaviors, and other social exposures among attendees (N = 81) of an exercise facility, by COVID-19 status — Chicago, Illinois, August 24–September 1, 2020.
| Characteristic | No. (%) of attendees |
p-value† | OR (95% CI)§ | ||
|---|---|---|---|---|---|
| Total (N = 81) | With COVID-19 (n = 55)* | Without COVID-19 (n = 26) | |||
|
Female
|
71 (87.7)
|
48 (87.3)
|
23 (88.5)
|
1.00
|
—
|
|
Age, yrs, median (IQR)
|
42 (29–55)
|
42 (27–57) |
41 (29–53) |
1.00 |
— |
|
Age group, yrs (n = 78)¶
| |||||
| <18 |
1 (1.3)
|
1 (1.8) |
0 (—) |
0.80 |
— |
| 18–44 |
44 (56.4)
|
32 (58.2) |
12 (52.2) |
— |
|
| 45–54 |
21 (26.9)
|
13 (23.6) |
8 (34.8) |
— |
|
| 55–64 |
10 (12.8)
|
7 (12.7) |
3 (13.0) |
— |
|
| ≥65 |
2 (2.6)
|
2 (3.6) |
0 (—) |
— |
|
|
Other characteristics
| |||||
| Black, non-Hispanic** (n = 74) |
72 (97.3)
|
49 (98.0) |
23 (95.8) |
1.00 |
— |
| Underlying medical conditions†† (n = 73) |
24 (32.9)
|
16 (34.0) |
8 (30.8) |
1.00 |
— |
| No history of smoking§§ (n = 68) |
64 (94.1)
|
41 (93.2) |
23 (95.8) |
1.00 |
— |
| Pregnant or could be pregnant |
1 (1.4)
|
0 (—) |
1 (3.8) |
1.00 |
— |
|
Attendee type
| |||||
| Facility patron |
78 (96.3)
|
55 (100.0) |
23 (88.5) |
— |
— |
| Facility employee |
3 (3.7)
|
0 (—) |
3 (11.5) |
— |
— |
|
In-class behaviors
| |||||
| Self-reported days of attendance, median (IQR) (n = 53) |
5 (2–8)
|
5 (3–7) |
3 (1–6) |
— |
— |
| Wore a mask during ≤60% of class time¶¶ (n = 58) |
44 (75.9)
|
32 (84.2) |
12 (60.0) |
0.06 |
3.5 (0.9–15.1) |
| Observed others wearing masks ≤60% of class time (n = 58) |
46 (79.3)
|
33 (86.8) |
13 (65.0) |
0.11 |
3.5 (0.8–16.6) |
| Practiced physical distancing ≤60% of class time*** (n = 56) |
4 (7.1)
|
3 (8.3) |
1 (5.0) |
1.00 |
1.7 (0.1–95.4) |
| Other social exposures ††† | 20 (27.4) | 12 (25.5) | 8 (30.8) | 0.42 | — |
Abbreviations: CI = confidence interval; COVID-19 = coronavirus disease 2019; IQR = interquartile range; OR = odds ratio.
* Attendees with laboratory-confirmed COVID-19 who were not reached for interview (n = 8) were included in analyses of attendance while infectious; dates of positive test result and facility-confirmed last attendance were used.
† p-values from Fisher's exact test were used to compare differences in demographic distributions and in-class behaviors among attendees with COVID-19 versus without COVID-19.
§ ORs among attendees with COVID-19 versus without COVID-19 were calculated for mask use, observing others’ mask use, and physical distancing during ≤60% versus ≥61% of exercise class time. Data on frequency of wearing or observing others wearing masks were missing for 17 (30.9%) attendees with COVID-19 and six (23.1%) without COVID-19; physical distancing data were missing for 19 (34.5%) attendees with COVID-19 and six (23.1%) without COVID-19; and data on self-reported classes attended were missing for 19 attendees with COVID-19 (34.5%) and nine without COVID-19 (34.6%).
¶ Age was unknown for three (11.5%) attendees without COVID-19.
** Race/ethnicity data were missing for five (9.1%) attendees with COVID-19 and two (7.7%) without COVID-19.
†† Reported underlying medical conditions among 73 respondents were as follows (with missing data for eight of 55 attendees with COVID-19): asthma, 11 (15%); hypertension, 10 (13.7%); and diabetes, chronic kidney disease, or prediabetic neuropathy, one (1.4%) each. None of the other underlying medical conditions asked about by interviewers were reported (i.e., chronic heart, liver, or pulmonary disease; seizures; sickle cell disease; or any immunocompromising conditions).
§§ Data on smoking status were missing for 11 (20%) attendees with COVID-19 and for two (7.7%) without COVID-19.
¶¶ Data on in-class mask use were missing for 17 (30.9%) attendees with COVID-19 and six (23.1%) without COVID-19; data on physical distancing were missing for 19 (34.5%) attendees with COVID-19 and for six (23.1%) without COVID-19.
*** Data on in-class physical distancing were missing for 19 (34.5%) attendees with COVID-19 and for six (23.1%) without COVID-19.
††† Other social exposures reported in the 2 weeks before symptom onset or a positive test result included working outside the home: six (10.9%) attendees with COVID-19, six (23.1%) without COVID-19; dining at restaurants: three (5.4%) attendees with COVID-19, none without COVID-19; attending church: one (1.8%) attendee with COVID-19, none without COVID-19; and other indoor or outdoor activities: nine (16.3%) attendees with COVID-19, three (11.5%) without COVID-19. One (1.8%) attendee with COVID-19 worked in a correctional facility with an ongoing COVID-19 outbreak; one attendee with COVID-19 hosted an indoor gathering with no mask use; one attendee with COVID-19 participated in a group bike ride with no mask use; and one attendee with COVID-19 participated in an indoor party with mask use.