The Impact of the Covid-19 Pandemic on Schizophrenia Patients Registered With the Community Mental Health Center

It was developed by Addington et al. (1994) to measure the presence of depression and the severity of depressive symptoms in patients with schizophrenia. The scale consists of 9 items to assess depression and is answered with a four-point Likert scale. The validity and reliability of the scale in schizophrenia patients in the Turkish population was determined by Oksay et al. by (2000). In the reliability study, the Cronbach's alpha coefficient was found to be 0.88. The cut-off point of the scale was stated as 11.

It is adapted from the Buss-Durkee Hostility Inventory by Buss and Perry (1992), the scale consists of 29 items and five-point Likert types. The scale is physical and verbal aggression, hostility, and anger. Questions 9 and 16 on the scale are reverse scored. The score value on the scale varies in direct proportion to the aggression, that is, the higher the score, the higher the aggression. The Cronbach Alpha internal consistency coefficients of the original version of the scale is defined as; 0.89 for physical aggression, 0.85 for physical aggression, 0.72 for verbal aggression, 0.77 for hostility, 0.83 for anger subscale.

"Developed by Cull and Gill (1989), it evaluates the probability of suicide in adolescents and adults. The Turkish validity and reliability of the scale were performed by Atlı et al (2009). The scale consists of 36 items and is answered as a four-point Likert-type scale as never or rarely, sometimes, often and often or always."