Reliability of the Direct Observation of Procedural Skills assessment tool for ultrasound-guided regional anaesthesia

The Direct Observation of Procedural Skills (DOPS) form is used as a workplace-based assessment tool in the current Australian and New Zealand College of Anaesthetists curriculum. The objective of this study was to evaluate the reliability of DOPS when used to score trainees performing ultrasound-guided regional anaesthesia. Reliability of an assessment tool is defined as the reproducibility of scores given by different assessors viewing the same trainee. Forty-nine anaesthetists were recruited to score two scripted videos of trainees performing a popliteal sciatic nerve block and an axillary brachial plexus block. Reliability, as measured by intraclass correlation coefficients, was -0.01 to 0.43 for the individual items in DOPS, and 0.15 for the \u27Overall Performance for this Procedure\u27 item. Assessors demonstrated consistency of scoring within DOPS, with significant correlation of sum of individual item scores with the \u27Overall Performance for this Procedure\u27 item (r=0.78 to 0.80, P\u3c0.001), and with yes versus no responses to the \u27Was the procedure completed satisfactorily?\u27 item (W=24, P=0.0004, Video 1, and W=65, P=0.003, Video 2). While DOPS demonstrated a good degree of internal consistency in this setting, inter-rater reliability did not reach levels generally recommended for formative assessment tools. Feasibility of the form could be improved by removing the \u27Was the procedure completed satisfactorily?\u27 item without loss of information