Measurement of quality of recovery using the QoR-40: a quantitative systematic review

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Abstract

Background

Several rating scales have been developed to measure quality of recovery after surgery and anaesthesia, but the most extensively used is the QoR-40, a 40-item questionnaire that provides a global score and subscores across five dimensions: patient support, comfort, emotions, physical independence, and pain. It has been evaluated in a variety of settings, but its overall psychometric properties (validity, reliability, ease of use, and interpretation) and clinical utility are uncertain.

Methods

We undertook a quantitative systematic review of studies evaluating psychometric properties of the QoR-40. Data were combined in meta-analyses using random effects models. This resulted in a total sample of 3459 patients from 17 studies originating in nine countries.

Results

We confirmed content, construct, and convergent [pooled r=0.58, 95% confidence interval (CI): 0.51–0.65] validity. Reliability was confirmed by excellent intraclass correlation (pooled α=0.91, 95% CI: 0.88–0.93), test–retest reliability (pooled r=0.90, 95% CI: 0.86–0.92), and inter-rater reliability (intraclass correlation=0.86). The clinical utility of the QoR-40 instrument was supported by high patient recruitment into evaluation studies (97%), and an excellent completion and return rate (97%). The mean time to complete the QoR-40 was 5.1 (95% CI: 4.4–5.7) min.

Conclusions

The QoR-40 is a widely used and extensively validated measure of quality of recovery. The QoR-40 is a suitable measure of postoperative quality of recovery in a range of clinical and research situations.

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