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

Table 4 Internal consistency estimates of the different CoPaQ subscales based on McDonald’s Omega and Cronbach’s Alpha in our three samples

	Derivation sample		Longitudinal validation sample		Psychiatric validation sample
Subscale	ω	α	ω	α	ω	α
COVID-19 contamination anxiety	0.79	0.78	0.79	0.77	0.77	0.77
COVID-19 hygiene measures	0.83	0.83	0.86	0.84	0.81	0.81
COVID-19 social distancing	0.88	0.87	0.87	0.87	0.76	0.75
COVID-19 anxiety buying	0.86	0.85	0.88	0.87	0.93	0.92
COVID-19 political restrictions	0.88	0.88	0.86	0.86	0.90	0.90
COVID-19 solidarity-based behaviours	0.82	0.82	0.87	0.86	0.81	0.81
COVID-19 countermeasure compliance	n.a.	n.a.	n.a.	n.a.	n.a.	n.a.
COVID-19 PTSD symptoms	0.78	0.78	0.83	0.81	0.82	0.82
COVID-19 sleep disturbance	0.83	0.81	0.87	0.85	0.85	0.84
COVID-19 substance abuse	0.77	0.75	0.80	0.77	0.76	0.74
COVID-19-specific stressor impact	n.a.	n.a.	n.a.	n.a.	n.a.	n.a.
COVID-19 daytime structure	0.72	0.69	0.76	0.75	0.80	0.79
COVID-19 social contacts	n.a.	n.a.	n.a.	n.a.	n.a.	n.a.
COVID-19 inner strength	n.a.	n.a.	n.a.	n.a.	n.a.	n.a.
COVID-19 institutional & political trust	0.87	0.86	0.88	0.88	0.81	0.79
COVID-19 conspiracy beliefs	0.82	0.82	0.79	0.78	0.90	0.89
COVID-19 social cohesion	0.80	0.79	0.77	0.76	n.a.	n.a.

ISSN: 1471-244X