ArticlePLoS neglected tropical diseases2019
Validity and reliability of telephone administration of the patient-specific functional scale for the assessment of recovery from snakebite envenomation.
Article in PLoS neglected tropical diseases, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers, 2 of them syntheses that pooled it.
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Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
7 citing papers in PubMed, 2 syntheses or guidelines pooled it.
- A global core outcome measurement set for snakebite clinical trials.The Lancet. Global health · 2023Pooled it
- Outcomes in intervention research on snakebite envenomation: a systematic review.F1000Research · 2022Pooled it
- Long-Term Clinical Outcomes of Rattlesnake Envenomation in Arizona Following Treatment With Crofab vs Anavip: A Retrospective Observational Study.Journal of the American College of Emergency Physicians open · 2025Article
- Functional Disability at 3 Months in Patients with Residual Limb Swelling after Snakebite Envenoming.The American journal of tropical medicine and hygiene · 2024Article
- [A global core outcome measurement set for snakebite clinical trials].Medecine tropicale et sante internationale · 2023Article
- Article
- Contextualizing the Impact of Snakebite Envenoming on Patients: A Qualitative Content Analysis of Patient-Specific Functional Scale Activities Using the International Classification of Functioning, Disability and Health.International journal of environmental research and public health · 2021Article
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Authors and funding
19 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectivesAlthough 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.
methodsThis 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.
resultsData 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 α: 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 ρ: 0.83 (CI: 0.78, 0.84), consistency was assessed as excellent (Cohen's κ 0.81 (CI: 0.78, 0.84), and Bland Altman analysis showed no systematic bias.
conclusionsTelephone administration of the PSFS provides valid, reliable, and consistent data for the assessment of recovery from snakebite envenomation.
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