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Table 6 T-tests comparing CoPaQ mental health and disease worries subscale scores for relevant variables to establish criterion validity

From: The COVID-19 Pandemic Mental Health Questionnaire (CoPaQ): psychometric evaluation and compliance with countermeasures in psychiatric inpatients and non-clinical individuals

   COVID-19 PTSD symptoms COVID-19 sleep disturbance COVID-19 substance use
n Mean (SD) t Mean (SD) t Mean (SD) t
Mental Health Diagnosis
 No 340 2.85 (3.51) −2.20* 2.66 (3.37) −4.54*** 0.82 (1.90) −3.30**
 Yes 171 3.71 (4.46)   4.16 (3.59)   1.71 (3.27)  
  1. P values based on Welch two sample t test
  2. SD Standard Deviation
  3. *p < .05, **p < .01, ***p < .001