Carolien Zeetsen

83 CHAPTER Cognitive performance during addiction treatment 5 Patient Competency Rating Scale The PCRS was developed to evaluate an individual’s awareness of cognitive, self–care, and social deficits after (traumatic) brain injury (Prigatano et al., 1986). The scale must be administered to the patient and an informant (clinician and/or relative) who is familiar with the patient and his/her abilities. The PCRS contains 30 items in which the respondent is asked to judge how easy or difficult it is (for the patient) to perform a variety of tasks. Each item is rated on a 5–point Likert scale, ranging from 1 (‘cannot do’) to 5 (‘can do with ease’). A total score (PCRS–TS) ranging from 30 to 150 can be obtained, where higher scores represent a higher level of everyday cognitive functioning (Kolakowsky–Hayner et al., 2012). Four domain scores were calculated, measuring activities of daily living (PCRS– ADL; scoring range 8–40), cognitive abilities (PCRS–CO; scoring range 8–40), interpersonal abilities (PCRS–IP; scoring range 7–35) and emotional lability (PCRS–EM; scoring range 7–35; Leathem et al., 1998). The PCRS has a good internal consistency (Cronbach α = 0.87–0.89) and test–retest reliability for all scores range from 0.63 to 0.84, as measured in patients with acquired brain injury (Hellebrekers et al., 2017). Procedure Each patient that was referred to the clinic was discussed in a multidisciplinary team to determine if there was a positive indication for clinical admission. As part of the intake procedure, MoCA 7.1 was administered to each patient at intake or preferably in the first week of admission (T0). In the sixth week of admission, one of the psychologists made an appointment with the patient for administration of MoCA 7.2 (T1). Note that the time between intake and clinical admission varied between patients. Therefore, the time between T0 and T1 also varies, namely between 16 and 395 days ( M = 62.7, SD = 45.6; see Figure 5.1, left panel). When the patient was (soon to be) clinically discharged, another appointment was made for the administration of MoCA 7.3 (T2). The time between T1 and T2 varied based on the duration of clinical admission, namely between 5 and 645 days ( M = 124.2, SD = 93.0; see Figure 5.1, right panel). The PCRS was completed by the patient at both T1 and T2, and by the primary responsible caregiver of the patient preferably in the same week. Both the MoCA and the PCRS were part of care as usual and were included in the Routine Outcome Monitoring (ROM), among several other questionnaires that are not part of the current study. Relevant demographic information was derived from the electronic patient files.