Table 4.

Associations between COVID-19 behavior and dichotomized contamination obsessions, contamination phobias, and OCI-R change, stratified by OCD diagnoses, doubt score, and COVID-19 risk score Univariable logistic regression models.

	Contamination Obsessions (N = 2117)	Contamination Phobias (N = 2117)	OCI-R Changea (N = 634)	OCI-R Change, Excluding washing itemsb (N = 771)
Odds Ratio (95% CI)
OCD Diagnosis
No	1.15 (1.13–1.17)e	1.13 (1.12–1.15)e	1.16 (1.09–1.23)e	1.13 (1.07–1.20)e
Yes	1.13 (1.08–1.18)e	1.14 (1.09–1.19)e	1.13 (0.92–1.38)	1.08 (0.93–1.26)
Doubt Score
17–39	1.19 (1.14–1.24)e	1.19 (1.12–1.26)e	1.22 (1.11–1.33)e	1.15 (1.07–1.24)e
40–59	1.13 (1.11–1.16)e	1.12 (1.07–1.13)e	1.10 (1.01–1.21)c	1.11 (1.01–1.22)c
60–81	1.12 (1.09–1.15)e	1.14 (1.11–1.17)e	1.11 (0.90–1.35)	1.05 (0.90–1.23)
COVID-19 Risk Score
0–2	1.17 (1.13–1.20)e	1.13 (1.10–1.16)e	1.15 (1.04–1.28)d	1.12 (0.99–1.27)
3–5	1.14 (1.11–1.17)e	1.14 (1.12–1.17)e	1.24 (1.11–1.37)c	1.17 (1.09–1.27)e
6–10	1.12 (1.08–1.16)e	1.13 (1.09–1.17)e	1.04 (0.95–1.15)	1.03 (0.94–1.13)

^aChange from 0 to 9 to 21+, among 634 participants with a pre-pandemic OCI-R score of 0–9.

^bChange from 0 to 9 to 16+, among 771 participants with a pre-pandemic OCI-R score of 0–9, excluding washing items.

^cp < 0.05.

^dp < 0.01.

^ep < 0.001.