Psychometric analysis of the Comfort with Communication in Palliative and End-of-Life Care (C-COPE) instrument.

Abstract

Nurses must be comfortable facilitating palliative and end-of-life communication with patients and their families. A validated instrument measuring the comfort of nurses with conducting end-of-life communication is essential for meeting the goals and wishes of patient care. This study aimed to develop and conduct a psychometric evaluation of the Comfort with Communication in Palliative and End-of-Life Care (C-COPE) instrument. Face, content, and construct validity, including test-retest reliability, were conducted. Four experts subjectively confirmed face content validity and the quantitative item content validity index (I-CVI) ranged from 0.67 to 1 and scale content validity index (S-CVI/Ave) was 0.98. Principal axis factoring with Promax rotation yielded a five-factor solution accounting for 66.2% of the variance. The items loading on the five factors ranged from 0.46-0.96 (factor 1), 0.67-0.93 (factor 2), 0.49-0.86 (factor 3), 0.68-0.79 (factor 4), and 0.24-0.96 (factor 5). Internal consistency reliability (coefficient a) was 0.90 for the total C-COPE, and above 0.75 for each factor. The five factors are 'cultural/spiritual considerations,' 'team considerations,' 'addressing decision-making,' 'addressing symptomatology,' and 'deliberate awareness.' Test-retest reliability yielded an intraclass correlation coefficient (ICC) of 0.87 (CI 95%, 0.82-0.91). The C-COPE is a reliable and valid instrument measuring nurse comfort with palliative and end of-life care communication, yet requires testing in more diverse samples.