Table 1.
Demographic characteristics and questionnaire score.
| Characteristic | Survey 1 | Survey 2 | Survey 3 | F or χ2 | P value | |
| Age (year), mean (SD) | 21.3 (2.5) | 21.2 (2.3) | 20.9 (2.0) | F=85.6 | <.001 | |
| Intensity of fear, mean (SD) | 7.8 (2.0) | 6.7 (2.2) | 6.5 (2.2) | F=1147.9 | <.001 | |
| Y-BOCSa score, mean (SD) | 7.9 (5.7) | 4.8 (5.1) | 4.5 (5.1) | F=1366.6 | <.001 | |
| SASb standard score, mean (SD) | 36.9 (7.9) | 36.1 (8.2) | 36.2 (8.1) | F=34.2 | <.001 | |
| Quarantine level, mean (SD) | 2.44 (0.7) | 1.26 (0.5) | 1.00 (0.0) | F=27,129.4 | <.001 | |
| Age (years), n (%) |
|
|
|
χ2=113.6 | <.001 | |
|
|
<26 | 12,814 (95.1) | 8193 (96.7) | 8617 (97.4) |
|
|
|
|
≥26 | 664 (4.9) | 274 (3.3) | 199 (2.6) |
|
|
| Gender, n (%) |
|
|
|
χ2=1.8 | .41 | |
|
|
Male | 4662 (34.6) |
2991 (35.3) |
3113 (35.3) |
|
|
|
|
Female | 8816 (65.4) | 5476 (64.7) | 5703 (54.7) |
|
|
| Major, n (%) |
|
|
|
χ2=227.3 | <.001 | |
|
|
Clinical | 8549 (63.4) |
4576 (54.0) |
5259 (59.7) |
|
|
|
|
Basic medical | 3428 (26.4) |
2902 (34.3) |
2467 (28.0) |
|
|
|
|
Nonmedical | 1501 (11.1) | 989 (11.7) | 1090 (12.3) |
|
|
| Sibling(s), n (%) |
|
|
|
χ2=1.5 | .48 | |
|
|
No | 2452 (18.2) | 1495 (17.7) | 1557 (17.7) |
|
|
|
|
Yes | 11,026 (81.8) | 6972 (82.3) | 7259 (82.3) |
|
|
| Year of enrollment, n (%) |
|
|
χ2=360.9 | <.001 | ||
|
|
2015 | 1319 (10.0) | 941 (11.1) | 665 (7.5) |
|
|
|
|
2016 | 2343 (17.7) | 1863 (22.0) | 1403 (15.9) |
|
|
|
|
2017 | 2997 (22.6) | 1511 (17.8) | 2013 (22.8) |
|
|
|
|
2018 | 3274 (24.7) | 2169 (25.6) | 2474 (28.1) |
|
|
|
|
2019 | 3017 (22.8) | 1883 (22.2) | 2206 (25.0) |
|
|
|
|
Other | 291 (2.2) | 92 (1.3) | 55 (0.6) |
|
|
| Y-BOCS scorec, n (%) |
|
|
|
χ2=704.5 | <.001 | |
|
|
≥16 | 1519 (11.3) | 305 (3.6) | 305 (3.5) |
|
|
|
|
<16 | 11,959 (88.7) | 8162 (96.4) | 8511 (96.5) |
|
|
aY-BOCS: Yale-Brown Obsessive-Compulsive Scale.
bSAS: Zung Self-Rating Anxiety Scale.
cThe odds ratio for the Y-BOCS was 2.4 (95% CI 2.2-2.7).