To Örebro University

The aim of this study was to psychometrically evaluate the Swedish operating room version of PUKAT 2.0. In total, 284 Swedish operating room nurses completed the survey of whom 50 completed the retest. The item difficulty P-value of 14 items ranged between 0.38 and 0.96 (median 0.65). Three items were found to be too easy (0.90-0.96). The D-value of 14 items ranged between 0.00 and 0.42 (median 0.46). Three items had a D-value lower than 0.20 (0.11-0.16) and eight items scored higher than 0.40 (0.45-0.61). The quality of the response alternatives (a-value) ranged between 0.00 and 0.42. This showed that nurses with a master's degree had a higher knowledge than nurses with a professional degree (respectively 9.4/14 versus 8.6/14; t = -2.4, df = 199, P = 0.02). The ICC was 0.65 (95% CI 0.45-0.78). The ICCs for the domains varied from 0.12 (95% CI = -0.16-0.39) to 0.59 (95% CI = 0.38-0.75). Results indicated that 11 of the original items contributed to the overall validity. However, the low participation in the test-retest made the reliability of the instrument low. An extended evaluation with a larger sample should be considered in order to confirm aspects of the psychometric properties of this instrument.