Thompson, Trevor ORCID: https://orcid.org/0000-0001-9880-782X, Lloyd, Andrew, Joseph, Alain and Weiss, Margaret (2017) The Weiss Functional Impairment Rating Scale-Parent Form for assessing ADHD: evaluating diagnostic accuracy and determining optimal thresholds using ROC analysis. Quality of Life Research, 26 (7). pp. 1879-1885. ISSN 0962-9343 (Print), 1573-2649 (Online) (doi:10.1007/s11136-017-1514-8)

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Abstract

Purpose: The Weiss Functional Impairment Rating Scale-Parent Form (WFIRS-P) is a 50-item scale that assesses functional impairment on 6 clinically relevant domains typically affected in attention-deficit/hyperactivity disorder (ADHD). As functional impairment is central to ADHD, the WFIRS-P offers potential as a tool for assessing functional impairment in ADHD. These analyses were designed to examine the overall performance of WFIRS-P in differentiating ADHD and non-ADHD cases using Receiver Operating Characteristics (ROC) analysis. This is the first attempt to empirically determine the level of functional impairment that differentiates ADHD children from normal controls.

Methods: This observational study comprised 5–19-year-olds with physician-diagnosed ADHD (n = 476) and non-ADHD controls (n = 202). ROC analysis evaluated the ability of WFIRS-P to discriminate between ADHD and non-ADHD, and identified a WFIRS-P cut-off score that optimises correct classification. Data were analysed for the complete sample, for males versus females, and for participants in two age groups (5–12 versus 13–19 years).

Results: Area under the curve (AUC) was 0.91 (95% confidence interval 0.88–0.93) for the overall WFIRS-P score, suggesting highly accurate classification of ADHD distinct from non-ADHD. Sensitivity (0.83) and specificity (0.85) were maximal for a mean overall WFIRS-P score of 0.65, suggesting this is an appropriate threshold for differentiation. Delong's test found no significant differences in AUCs for males versus females or 5–12 versus 13–19 years, suggesting WFIRS-P is an accurate classifier of ADHD across gender and age.

Conclusions: When assessing function, WFIRS-P appears to provide a simple and effective basis for differentiating between individuals with/without ADHD in terms of functional impairment.

Item Type:	Article
Additional Information:	© The Author(s) 2017. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Uncontrolled Keywords:	Attention-deficit/hyperactivity disorder · Weiss functional impairment rating scale · Disease severity · Disease classification · Receiver operating characteristics analysis
Faculty / School / Research Centre / Research Group:	Faculty of Education, Health & Human Sciences Faculty of Education, Health & Human Sciences > School of Human Sciences (HUM)
Last Modified:	22 Feb 2018 11:33
URI:	http://gala.gre.ac.uk/id/eprint/16338

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