Table 1.
Cohort Demographics Across Time Points
| Participants, No. (%)a | |||||||
|---|---|---|---|---|---|---|---|
| Characteristic | Jul 2020 | Dec 2020 | Mar 2021 | Jun 2021 | Sep 2021 | Dec 2021 | P Value |
| Total | 527 | 492 | 406 | 370 | 323 | 288 | |
| Gender | … | … | … | … | … | … | .8110 |
| Female | 406 (77.04) | 378 (76.83) | 315 (77.59) | 297 (80.27) | 256 (79.26) | 228 (79.17) | |
| Male | 119 (22.58) | 112 (22.76) | 90 (22.17) | 72 (19.46) | 66 (20.43) | 59 (20.49) | |
| Age, y | … | … | … | … | … | … | .0006 |
| 20–29 | 95 (18.03) | 80 (16.26) | 49 (12.07) | 37 (10.0) | 30 (9.29) | 26 (9.03) | |
| 30–39 | 164 (31.12) | 158 (32.11) | 126 (31.03) | 112 (30.27) | 86 (26.63) | 76 (26.39) | |
| 40–49 | 96 (18.22) | 91 (18.50) | 82 (20.20) | 79 (21.35) | 68 (21.05) | 68 (23.61) | |
| 50–59 | 112 (21.25) | 98 (19.92) | 86 (21.18) | 77 (20.81) | 74 (22.91) | 63 (21.88) | |
| 60–69 | 60 (11.39) | 64 (13.01) | 62 (15.27) | 64 (17.30) | 64 (19.81) | 55 (19.10) | |
| Body mass index, kg/m2 | … | … | … | … | … | … | .9360 |
| Underweight | 9 (1.71) | 6 (1.22) | 3 (0.74) | 1 (1.89) | 4 (1.24) | 3 (1.04) | |
| Normal | 250 (47.44) | 228 (46.34) | 182 (44.83) | 174 (47.03) | 143 (44.27) | 132 (45.83) | |
| Overweight | 156 (29.60) | 152 (30.89) | 129 (31.77) | 103 (27.84) | 99 (30.65) | 85 (29.51) | |
| Obese | 112 (21.25) | 106 (21.54) | 92 (22.66) | 86 (23.24) | 77 (23.84) | 68 (23.61) | |
| Race | … | … | … | … | … | … | .9645 |
| Asian | 44 (8.35) | 41 (8.33) | 34 (8.37) | 31 (8.38) | 26 (7.03) | 26 (9.03) | |
| Black | 20 (3.08) | 17 (8.33) | 12 (2.96) | 13 (3.51) | 9 (2.79) | 8 (2.78) | |
| White | 430 (81.59) | 404 (82.11) | 312 (76.85) | 290 (78.38) | 260 (80.50) | 231 (80.21) | |
| Native American/PI | 2 (0.38) | 1 (0.19) | 1 (0.19) | 1 (0.19) | 1 (0.19) | 1 (0.19) | |
| Other | 28 (5.32) | 21 (4.92) | 16 (3.94) | 9 (2.43) | 8 (2.48) | 6 (2.08) | |
| Hispanic/Latinx | … | … | … | … | … | … | .2370 |
| Yes | 39 (7.40) | 38 (7.72) | 25 (6.16) | 21 (5.68) | 14 (4.33) | 13 (4.51) | |
| No | 487 (92.41) | 453 (92.07) | 380 (93.60) | 348 (94.05) | 309 (95.67) | 275 (95.49) | |
| Occupationb | … | … | … | … | … | … | .9999 |
| Administrative | 54 (10.25) | 52 (10.57) | 42 (10.34) | 43 (11.62) | 40 (12.38) | 31 (10.76) | |
| Allied health | |||||||
| Non–patient facing | 16 (3.04) | 16 (3.25) | 12 (2.96) | 11 (2.97) | 12 (3.72) | 12 (4.17) | |
| Patient facing | 70 (13.28) | 65 (13.21) | 54 (13.30) | 46 (12.43) | 35 (10.84) | 35 (12.15) | |
| Physician | 166 (31.50) | 152 (30.89) | 128 (31.53) | 119 (23.16) | 98 (30.34) | 91 (31.06) | |
| Nurse | 217 (41.18) | 203 (41.26) | 166 (40.89) | 147 (39.73) | 135 (41.80) | 117 (40.63) | |
| COVID-19 vaccination statusc | … | … | … | … | … | … | |
| Not vaccinated | 527 (100.00) | 441 (89.63) | 50 (12.32) | 20 (5.41) | 11 (3.41) | 2 (0.69) | |
| Fully vaccinated | … | 12 (2.44) | 356 (87.68) | 250 (94.59) | 311 (96.28) | 74 (25.69) | |
| 1 booster dose | … | … | … | … | 1 (0.31) | 212 (73.61) | |
Abbreviation: PI, Pacific Islander.
Column percentages may not add to 100% given missing data ranging from 0.19% to 11.23%. P values are based on χ2 test.
Administrative: director, supervisor, manager, chair, admissions personnel. Allied health, non–patient facing: laboratory personnel, laboratory technologist, radiology. Allied health, patient facing: technologist, medical assistant, speech pathologist, team leader, occupational therapist, dentist, phlebotomy, patient education, pharmacy, other. Physician: attending or resident medical doctor/doctor of osteopathy. Nurse: registered nurse, advanced practice registered nurse, nurse technician.
Full vaccination: completion of a primary vaccine series (2 doses of Moderna mRNA-1273 or Pfizer-BioNTech BNT162b2 or 1 dose of Johnson & Johnson/Janssen). Booster dose: 1 additional vaccine dose following a primary series.