A study of the test-retest reliability of the self-perceived general recovery and self-perceived change in neck pain questions in patients with recent whiplash-associated disorders.
The objectives of this study were to determine the test-retest reliability of two self-perceived recovery questions in patients with recent whiplash-associated disorders (WAD), and to assess whether remembering previous answers influences reliability. The self-perceived general recovery and self-perceived change in neck pain questions were administered to 46 patients with recent WAD 6 weeks after recruitment and again 3-5 days later. At follow-up, we also asked participants if they remembered their previous answers. We used the intra-class correlation coefficients (ICC) to measure the reliability of the original ordinal response structure and kappa statistics for dichotomized responses. The ICC [95% confidence intervals (CI)] for the general recovery and for the change in neck pain questions were 0.70 (0.60-0.80) and 0.80 (0.72-0.87), respectively. The kappa statistic (95% CI) for the general recovery question was 0.81 (0.64-0.99) when recovery was defined as "completely better" or "much improved". The kappa statistic (95% CI) for the change in neck pain question was 0.80 (0.62-0.99) when recovery was defined as "very much better" or "better". Our analysis suggests that the test-retest reliability may be higher for participants who remembered their previous responses. In conclusion, our results suggest that self-perceived recovery questions have adequate reliability for use in epidemiological research of WAD.
Ngo
Trung
T
Toronto Western Research Institute, University Health Network, Toronto, Canada.
Stupar
Maja
M
Côté
Pierre
P
Boyle
Eleanor
E
Shearer
Heather
H
D000328:Adult; D000368:Aged; D001294:Attitude to Health; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D019547:Neck Pain / Q000453:epidemiology* / Q000523:psychology* / Q000628:therapy; D009483:Neuropsychological Tests / Q000706:statistics & numerical data*; D017063:Outcome Assessment, Health Care / Q000379:methods; D010147:Pain Measurement / Q000379:methods; D017060:Patient Satisfaction; D011237:Predictive Value of Tests; D020127:Recovery of Function / Q000502:physiology; D015203:Reproducibility of Results; D012647:Self-Assessment; D014911:Whiplash Injuries / Q000453:epidemiology* / Q000523:psychology* / Q000628:therapy; D055815:Young Adult