Table 4. Negative binomial model with intra-COVID-19 pandemic scores on the Skin Picking Scale (n=221).
| Parameter Estimates | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Parameter | B | Std. Error | 95% Wald Confidence Interval | Hypothesis Test | Collinearity Statistics | ||||
| Lower | Upper | Wald Chi-Square | df | Sig. | Tolerance | VIF | |||
| (Intercept) | .893 | .9224 | -.914 | 2.701 | .938 | 1 | .333 | ||
| Age | -.002 | .0072 | -.016 | .012 | .053 | 1 | .818 | .785 | 1.274 |
| Male (vs. other) gender | -.171 | .1556 | -.476 | .134 | 1.206 | 1 | .272 | .912 | 1.097 |
| Lower (vs. higher) education levels | -.027 | .2594 | -.535 | .481 | .011 | 1 | .917 | .935 | 1.069 |
| Non-white (vs. white) ethnicity | -.109 | .1814 | -.464 | .247 | .361 | 1 | .548 | .826 | 1.210 |
| Non-married (vs. married) status | .095 | .1645 | -.227 | .418 | .336 | 1 | .562 | .815 | 1.227 |
| Unemployed (vs. employed) | -.125 | .3268 | -.765 | .515 | .146 | 1 | .702 | .866 | 1.155 |
| Lack vs. presence of past SPD diagnosis | -.112 | .4191 | -.934 | .709 | .072 | 1 | .789 | .824 | 1.214 |
| Negative (vs. positive) family history of SPD | -.016 | .5679 | -1.129 | 1.097 | .001 | 1 | .978 | .717 | 1.394 |
| Number of COVID-19 related events | .015 | .0512 | -.085 | .116 | .091 | 1 | .763 | .431 | 2.318 |
| Number of COVID-19 related stressful events | .041 | .0436 | -.044 | .127 | .895 | 1 | .344 | .400 | 2.497 |
| CHIT total | -.001 | .0138 | -.028 | .026 | .010 | 1 | .921 | .717 | 1.395 |
| BIS total | .024 | .0169 | -.009 | .057 | 2.039 | 1 | .153 | .750 | 1.334 |
| SPQ total | .005 | .0163 | -.027 | .036 | .082 | 1 | .775 | .703 | 1.423 |
| DASS21 depression (before) | .002 | .0245 | -.046 | .050 | .008 | 1 | .928 | .362 | 2.761 |
| DASS21_anxiety (before) | -.002 | .0344 | -.070 | .065 | .005 | 1 | .942 | .339 | 2.946 |
| DASS21_stress_(before) | -.012 | .0317 | -.074 | .051 | .133 | 1 | .715 | .315 | 3.170 |
| SPS_total_(before) | .065 | .0170 | .032 | .098 | 14.765 | 1 | <.001 | .718 | 1.393 |
| (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; MGH-HPS= Massachusetts General Hospital Hair Pulling Scale