Table 6. Negative binomial model with intra-COVID-19 pandemic scores on the Vancouver Obsessional Compulsive Inventory-Mental Contamination (VOCI-MC).
| Parameter Estimates | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Parameter | B | Std. Error | 95% Wald Confidence Interval | Hypothesis Test | Collinearity Statistics | ||||
| Lower | Upper | Wald Chi-Square | df | Sig. | Tolerance | VIF | |||
| (Intercept) | .088 | .4074 | -.710 | .887 | .047 | 1 | .829 | ||
| Age | -.004 | .0034 | -.010 | .003 | 1.210 | 1 | .271 | .845 | 1.184 |
| Male (vs. other) gender | -.102 | .0810 | -.260 | .057 | 1.569 | 1 | .210 | .943 | 1.060 |
| Lower (vs. higher) education levels | -.118 | .1394 | -.391 | .155 | .718 | 1 | .397 | .951 | 1.052 |
| Non-white (vs. white) ethnicity | .208 | .0900 | .032 | .385 | 5.350 | 1 | .021 | .931 | 1.074 |
| Non-married (vs. married) status | .035 | .0840 | -.129 | .200 | .178 | 1 | .673 | .898 | 1.114 |
| Unemployed (vs. employed) | -.207 | .1625 | -.526 | .111 | 1.628 | 1 | .202 | .969 | 1.032 |
| Lack vs. presence of past OCD diagnosis | .208 | .2074 | -.198 | .615 | 1.008 | 1 | .315 | .870 | 1.149 |
| Negative (vs. positive) family history of OCD | .053 | .1630 | -.266 | .373 | .107 | 1 | .743 | .902 | 1.109 |
| Number of COVID-19 related events | .035 | .0345 | -.033 | .102 | 1.005 | 1 | .316 | .494 | 2.024 |
| Number of COVID-19 related stressful events | .056 | .0257 | .006 | .107 | 4.822 | 1 | .028 | .500 | 1.999 |
| CHIT total | .035 | .0070 | .021 | .049 | 24.677 | 1 | <.001 | .702 | 1.424 |
| BIS total | .004 | .0088 | -.013 | .021 | .229 | 1 | .632 | .819 | 1.221 |
| SPQ total | .031 | .0093 | .013 | .049 | 11.195 | 1 | .001 | .612 | 1.633 |
| DASS21 depression (before) | .007 | .0130 | -.018 | .033 | .300 | 1 | .584 | .392 | 2.552 |
| DASS21_anxiety (before) | -.025 | .0212 | -.067 | .017 | 1.396 | 1 | .237 | .381 | 2.622 |
| DASS21_stress_(before) | -.010 | .0175 | -.044 | .025 | .307 | 1 | .580 | .329 | 3.040 |
| VOCI-MC total (before) | .069 | .0056 | .059 | .080 | 155.275 | 1 | <.001 | .508 | 1.969 |
| (Scale) | 1 | ||||||||
| (Negative binomial) | 1 | ||||||||
Footnote: CHIT= Cambridge-Chicago Trait Compulsivity Scale; BIS= Barratt Impulsiveness Scale; SPQ=Schizotypal Personality Questionnaire; DASS-21= Depression Anxiety Stress Scale-21; VOCI=Vancouver Obsessional Compulsive Inventory-Mental Contamination.