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Related Experiment Videos

Nonresponse in sample surveys: the problem and some solutions

D R Brogan

    Physical Therapy
    |August 1, 1980
    PubMed
    Summary

    Nonresponse in physical therapy surveys can cause bias. Subsampling nonrespondents offers a method to improve data accuracy when response rates are low.

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    Area of Science:

    • Physical Therapy Research
    • Survey Methodology
    • Biostatistics

    Background:

    • Nonresponse is a significant challenge in physical therapy sample surveys.
    • Unaddressed nonresponse can introduce substantial bias into research findings.
    • Existing literature highlights the impact of nonresponse on data integrity.

    Purpose of the Study:

    • To review techniques for increasing survey response rates in physical therapy.
    • To introduce and detail the method of subsampling nonrespondents for intensive follow-up.
    • To provide formulas and an example for estimating population means using this subsampling technique.

    Main Methods:

    • Review of personal contact strategies to enhance subject participation.
    • Detailed explanation of the nonrespondent subsampling technique.
    • Development of formulas for combining data from initial respondents and subsampled nonrespondents.

    Main Results:

    • Personal contact methods aim to increase initial willingness to participate.
    • Subsampling nonrespondents provides a structured approach to mitigate nonresponse bias.
    • The presented formulas allow for accurate estimation of population means even with high nonresponse.

    Conclusions:

    • Subsampling nonrespondents is a valuable, though less recognized, method for physical therapy surveys.
    • This technique is particularly recommended when a high nonresponse rate is anticipated.
    • Implementing nonrespondent subsampling can improve the reliability and validity of physical therapy research data.

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