Inter-Rater Reliability of Novice Linkers Using an Innovative Sequential Iterative Linking Method to Link Prosthetic Outcomes to The International Classification of Functioning, Disability and Health

Abstract

When linking outcomes to the International Classification of Functioning, Disability and Health (ICF), inter-rater reliability is typically assessed at the conclusion of the linking process. This method does not allow for iterative evaluation and adaptations that would improve inter-rater reliability as novices gain experience. This pilot study aims to quantify the inter-rater reliability of novice linkers when using an innovative, sequential, iterative linking method to link prosthetic outcomes to the ICF. Across 5 sequential rounds, 2 novices independently linked outcomes to the ICF. A consensus discussion followed each round that informed refinement of the customized ICF linking rules. The inter-rater reliability was calculated for each round using Gwet's agreement coefficient (AC1). A total of 1,297 outcomes were linked across 5 rounds. At the end of round 1 inter-rater reliability was high (AC1 = 0.74, 95% confidence interval (95% CI) 0.68-0.80). At the end of round 3, interrater reliability (AC1 = 0.84, 95% CI 0.80-0.88) was significantly improved and marked the point of consistency where further improvements in inter-rater reliability were not statistically significant. A sequential iterative linking method provides a learning curve that allows novices to achieve high-levels of agreement through consensus discussion and iterative refinement of the customized ICF linking rules.