The impact of the coronavirus pandemic on specific symptom dimensions and severity in OCD: A comparison before and during COVID-19 in the context of stress responses

The present study aimed to compare a group of patients with obsessive-compulsive disorder (OCD; N=270) before and during COVID-19 on specific obsessive-compulsive (OC) symptom dimensions and symptom severity. In addition, the study aimed to evaluate the associations of COVID-19-related stress responses with change in OC symptom dimensions and severity of symptoms as the result of the pandemic. Results showed that patients with OCD had higher scores on all OC symptom dimensions and symptom severity during the pandemic as compared to their scores from before the pandemic. Thus, the effect of COVID-19 is not limited to an increase in fears of contamination alone, but occurs across other symptom dimensions, including responsibility for harm, unacceptable thoughts, and symmetry. In addition, regression analyses indicated that COVID-19-related stress responses significantly predicted the observed increase in specific OC symptom dimensions and general severity, after controlling for pre-COVID-19 scores of symptoms and severity. The increase of symptoms as the result of COVID-19 might best be understood in the context of a non-specific stress-related response similar to the effects observed in non-clinical and other clinical populations.