Cases, N (row %) | Non-cases, N (row %) | IRR (95% CI) | |
Overall* | 57 (2.6) | 2120 (97.4) | – |
Age | |||
18–19 years | 21 (8.0) | 243 (92.0) | 8.3 (4.2 to 17.5) |
20–21 years | 24 (3.8) | 607 (96.2) | 4.1 (2.1 to 8.6) |
≥22 years | 12 (0.9) | 1270 (99.1) | Reference |
Gender | |||
Woman | 37 (3.1) | 1147 (96.9) | 1.5 (0.8 to 2.6) |
Man | 19 (2.1) | 892 (97.9) | Reference |
Non-binary/other | 0 (0) | 46 (100) | – |
Race/ethnicity† | |||
American Indian/Alaska Native | 0 (0) | 29 (100) | – |
Asian/Pacific Islander | 11 (1.6) | 691 (98.4) | 0.5 (0.2 to 0.9) |
Black/African American | 1 (1.2) | 82 (98.8) | 0.4 (0.0 to 2.0) |
Hispanic/Latine/Spanish origin | 7 (2.1) | 320 (97.9) | 0.8 (0.3 to 1.7) |
White | 45 (3.6) | 1216 (96.4) | 3.3 (1.7 to 7.2) |
Other | 4 (1.8) | 217 (98.2) | 0.6 (0.2 to 1.6) |
Programme level | |||
Undergraduate | 46 (4.1) | 1067 (95.9) | 4.1 (2.2 to 8.7) |
Graduate | 10 (1.0) | 1027 (99.0) | Reference |
Living at fraternity/sorority | 28 (22.4) | 97 (77.6) | 20.9 (12.3 to 35.5) |
Currently working outside the home | 6 (1.4) | 410 (98.6) | 0.5 (0.2 to 1.1) |
*N=2177 students with at least one qPCR test for SARS-CoV-2 during the study period.
†Not mutually exclusive; all participants not included in specified racial/ethnic category served as reference for each comparison.
IRR, incidence rate ratio; qPCR, quantitative PCR.