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. Author manuscript; available in PMC: 2021 Oct 27.
Published in final edited form as: J Psychiatr Res. 2021 Apr 13;143:471–480. doi: 10.1016/j.jpsychires.2021.03.046

Table 5. Negative binomial model with intra-COVID-19 pandemic scores on the Dimensional Obsessive-Compulsive Scale (DOCS) as the dependent variable and pre-covid DOCS subscores as independent variables.

Parameter Estimates  
Parameter B Std. Error 95% Wald Confidence Interval Hypothesis Test Collinearity Statistics
      Lower Upper Wald Chi-Square df Sig. Tolerance VIF
(Intercept) 2.470 .1668 2.143 2.797 219.268 1 .000    
Age -.005 .0032 -.011 .001 2.684 1 .101 .887 1.127
Male (vs. other) gender -.153 .0764 -.303 -.003 4.022 1 .045 .973 1.028
Lower (vs. higher) education levels -.093 .1325 -.353 .167 .495 1 .482 .973 1.027
Non-white (vs. white) ethnicity .112 .0874 -.059 .284 1.656 1 .198 .923 1.084
Non-married (vs. married) status -.050 .0788 -.205 .104 .409 1 .522 .924 1.082
Unemployed (vs. employed) .014 .1547 -.289 .318 .009 1 .926 .974 1.027
Number of COVID-19 related events .034 .0316 -.028 .096 1.139 1 .286 .492 2.034
Number of COVID-19 related stressful events .064 .0233 .019 .110 7.635 1 .006 .514 1.946
DOCS fear of harm - before .069 .0176 .034 .103 15.198 1 <.001 .364 2.748
DOCS contamination - before .019 .0158 -.012 .050 1.394 1 .238 .592 1.689
DOCS symmetry - before .052 .0175 .018 .087 9.003 1 .003 .451 2.217
DOCS unacceptable thoughts - before .022 .0149 -.007 .051 2.175 1 .140 .420 2.380
DASS21_total_before .004 .0046 -.005 .013 .778 1 .378 .614 1.629

Footnote: DOCS=Dimensional Obsessive-Compulsive Scale; DASS-21= Depression Anxiety Stress Scale-21