Validity of the PROMIS depression and anxiety common metrics in an online sample of Australian adults

Validity of the PROMIS depression and anxiety common metrics in an online sample of Australian... Purpose Recent US-based studies have utilised item response theory (IRT) to equate several self-report scales for depression and anxiety using the PROMIS depression and anxiety common metrics. The current study reports on the validity of the US-based equating procedures for the Patient Health Questionnaire-9 (PHQ-9), Generalized Anxiety Disorder-7 (GAD-7) and Kessler 6 psychological distress scale (K6) to equate scores in a large online sample of Australian adults. Methods Data comprised 3175 Australians recruited online. Each participant provided responses to the PROMIS depres- sion and anxiety item banks, the PHQ-9, the GAD-7 and the K6. Two scoring methods were used to convert the scores on the PHQ-9, GAD-7 and K6 to the PROMIS depression and anxiety metrics. The converted scores were compared to the PROMIS depression and anxiety scores using intraclass correlations, mean difference, mean of absolute differences and Bland–Altman limits of agreement. Results Statistically significant mean differences were identified in five out of eight equated scores, albeit the effect sizes were small (Cohen’s d ≤ 0.25). The correlations were uniformly high (ICC ≥ 0.86). The mean of absolute differences between observed and equated scores for each metric and across scoring methods ranged between 4.23 and 5.33. Conclusions The results http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Quality of Life Research Springer Journals

Validity of the PROMIS depression and anxiety common metrics in an online sample of Australian adults

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Publisher
Springer Journals
Copyright
Copyright © 2018 by Springer International Publishing AG, part of Springer Nature
Subject
Medicine & Public Health; Quality of Life Research; Sociology, general; Public Health; Quality of Life Research
ISSN
0962-9343
eISSN
1573-2649
D.O.I.
10.1007/s11136-018-1905-5
Publisher site
See Article on Publisher Site

Abstract

Purpose Recent US-based studies have utilised item response theory (IRT) to equate several self-report scales for depression and anxiety using the PROMIS depression and anxiety common metrics. The current study reports on the validity of the US-based equating procedures for the Patient Health Questionnaire-9 (PHQ-9), Generalized Anxiety Disorder-7 (GAD-7) and Kessler 6 psychological distress scale (K6) to equate scores in a large online sample of Australian adults. Methods Data comprised 3175 Australians recruited online. Each participant provided responses to the PROMIS depres- sion and anxiety item banks, the PHQ-9, the GAD-7 and the K6. Two scoring methods were used to convert the scores on the PHQ-9, GAD-7 and K6 to the PROMIS depression and anxiety metrics. The converted scores were compared to the PROMIS depression and anxiety scores using intraclass correlations, mean difference, mean of absolute differences and Bland–Altman limits of agreement. Results Statistically significant mean differences were identified in five out of eight equated scores, albeit the effect sizes were small (Cohen’s d ≤ 0.25). The correlations were uniformly high (ICC ≥ 0.86). The mean of absolute differences between observed and equated scores for each metric and across scoring methods ranged between 4.23 and 5.33. Conclusions The results

Journal

Quality of Life ResearchSpringer Journals

Published: Jun 5, 2018

References

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