TABLE 1.
Baseline characteristics of the study participants of 1027 Indiana University undergraduate students, September 2020
| Tota N = 1027 n (%) | Primary exposure: total AUDIT score a | P‐value b | ||
|---|---|---|---|---|
| AUDIT < 8 n = 688 (68.2%) | AUDIT ≥ 8 n = 321 (31.8%) | |||
| Socio‐demographic characteristics | ||||
| Age (years) | < 0.0001 | |||
| ≥ 21 | 332 (34.4) | 191 (29.5) | 139 (46.0) | |
| < 21 | 632 (65.6) | 457 (70.5) | 163 (54.0) | |
| Missing | 63 | 40 | 19 | |
| Sex at birth | < 0.0001 | |||
| Female | 655 (64.0) | 476 (69.2) | 171 (53.3) | |
| Male | 368 (36.0) | 212 (30.8) | 150 (46.7) | |
| Missing | 4 | 0 | 0 | |
| Race | < 0.0001 c | |||
| Asian | 77 (7.5) | 67 (9.7) | 10 (3.1) | |
| Black | 13 (1.3) | 11 (1.6) | 2 (0.6) | |
| Multi‐racial | 80 (7.8) | 60 (8.7) | 20 (6.2) | |
| Other | 43 (4.2) | 35 (5.1) | 7 (2.2) | |
| White | 809 (79.2) | 515 (74.9) | 282 (87.9) | |
| Missing | 5 | 0 | 0 | |
| Race dichotomized | < 0.0001 | |||
| White | 809 (79.2) | 515 (74.9) | 282 (87.9) | |
| Non‐white | 213 (20.8) | 173 (25.1) | 39 (12.1) | |
| Missing | 5 | 0 | 0 | |
| Year in school | < 0.0001 | |||
| 1st | 224 (21.9) | 167 (24.3) | 50 (15.6) | |
| 2nd | 235 (23.0) | 168 (24.5) | 65 (20.2) | |
| 3rd | 255 (25.0) | 173 (25.2) | 79 (24.6) | |
| 4th and 5th | 307 (30.1) | 178 (25.9) | 127 (39.6) | |
| Missing | 6 | 2 | 0 | |
| Residence | 0.0012 | |||
| Off‐campus | 701 (68.7) | 452 (65.8) | 243 (75.9) | |
| On‐campus | 320 (31.3) | 235 (34.2) | 77 (24.1) | |
| Missing | 6 | 1 | 1 | |
| Greek membership | < 0.0001 | |||
| No | 788 (77.2) | 565 (82.4) | 213 (66.4) | |
| Yes | 233 (22.8) | 121 (17.6) | 108 (33.6) | |
| Missing | 6 | 2 | 0 | |
| Intervention group | 0.2089 | |||
| Group 1 | 516 (50.2) | 355 (51.6) | 152 (47.4) | |
| Group 2 | 511 (49.8) | 333 (48.4) | 169 (52.6) | |
| Primary outcome | ||||
| SARS‐CoV‐2 seroconversion, among those who were seronegative for SARS‐CoV‐2 at baseline (n = 1027) | 0.0039 | |||
| Yes | 42 (5.2) | 20 (3.6) | 21 (8.5) | |
| No | 766 (94.8) | 531 (96.4) | 226 (91.5) | |
| Missing | 219 | 137 | 74 | |
| Secondary outcomes | ||||
| Self‐reported new SARS‐CoV‐2 infections since baseline: among those who self‐reported a negative SARS‐CoV‐2 infection history at baseline and self‐reported testing for SARS‐CoV‐2 active infection since baseline, in the end‐line survey (n = 518) | 0.0244 | |||
| Yes | 44 (8.6) | 23 (6.8) | 21 (12.8) | |
| No | 465 (91.4) | 317 (93.2) | 143 (87.2) | |
| Missing | 9 | 6 | 3 | |
| Symptomatic COVID‐19: among those who self‐reported positive SARS‐CoV‐2 testing history at baseline (n = 128) | 0.1138 | |||
| Yes | 95 (75.4) | 42 (68.9) | 48 (81.4) | |
| No | 31 (24.6) | 19 (31.1) | 11 (18.6) | |
| Missing | 2 | 2 | 0 | |
a
Overall, Alcohol Use Disorders Identification Test (AUDIT) score was missing for 18 participants.
b
χ2 and Fisher's exact tests were used to compare the groups.
c
Fisher's exact test due to small cell sizes. Bold type indicates significant values.