Validity and reliability of telephone administration of the patient-specific functional scale for the assessment of recovery from snakebite envenomation
Duke University School of Medicine¦¦Estados Unidos ; Denver Health¦¦Estados Unidos ; Washington University School of Medicine¦¦Estados Unidos ; University of California (UC)¦¦Estados Unidos ; University of North Carolina School of Medicine (UNC)¦¦Estados Unidos ; East Carolina University Brody School of Medicine¦¦Estados Unidos ; Baylor College of Medicine¦¦Estados Unidos ; University of Texas Southwestern Medical Center¦¦Estados Unidos
Appears in Collections:
Objectives Although more than 1.8 million people survive snakebite envenomation each year, their recovery is understudied. Obtaining long-term follow-up is challenging in both high- and low-resource settings. The Patient-Specific Functional Scale (PSFS) is an easily administered, well-accepted patient-reported outcome that is validated for assessing limb recovery from snakebite envenomation. We studied whether the PSFS is valid and reliable when administered by telephone. Methods This is a secondary analysis of data from a randomized clinical trial. We analyzed the results of PSFS collected in-person on days 3, 7, 14, 21, and 28 and by telephone on days 10, 17, and 24. We assessed the following scale psychometric properties: (a) content validity (ceiling and floor effects), (b) internal structure and consistency (Cronbach’s alpha), and (c) temporal and external validity using Intraclass Correlation Coefficient (ICC). Temporal stability was assessed using Spearman’s correlation coefficient and agreement between adjacent in-person and telephonic assessments with Cohen’s kappa. Bland Altman analysis was used to assess differential bias in low and high score results. Results Data from 74 patients were available for analysis. Floor effects were seen in the early post-injury time points (median: 3 (IQR: 0, 5) at 3 days post-enrollment) and ceiling effects in the late time points (median: 9 (IQR: 8, 10). Internal consistency was good to excellent with both in-person (Cronbach a: 0.91 (95%CI 0.88, 0.95)) and telephone administration (0.81 (0.73, 0.89). Temporal stability was also good (ICC: 0.83 (0.72, 0.89) in-person, 0.80 (0.68, 0.88) telephone). A strong linear correlation was found between in-person and telephone administration (Spearman’s Ró: 0.83 (CI: 0.78, 0.84), consistency was assessed as excellent (Cohen’s capa 0.81 (CI: 0.78, 0.84), and Bland Altman analysis showed no systematic bias. Conclusions Telephone administration of the PSFS provides valid, reliable, and consistent data for the assessment of recovery from snakebite envenomation.
Theophanous RG., Vissoci JRN, Fan HW, Griffin MS., Anderson VE., Mullins ME., et al. Validity and reliability of telephone administration of the patient-specific functional scale for the assessment of recovery from snakebite envenomation. PLoS Negl. Trop. Dis.. 2019 Dec;13(12):e0007935. doi:10.1371/journal.pntd.0007935.
Link to cite this reference
The access to the publications deposited in this repository respects the licenses from journals and publishers.