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Test-retest variability of cyclodeviations measured using the double Maddox rod test.


ABSTRACT: The double Maddox rod test is often used to measure cyclodeviations and to monitor change over time. The purpose of this study was to estimate test-retest reliability and the amount of cyclodeviation that would be considered real change using 95% limits of agreement. We retrospectively studied 86 clinically stable patients with double Maddox rod measurements 5-175 days apart (median, 69 days). The range of cyclodeviation at the first measurement was 6° incyclodeviation to 15° excyclodeviation. We calculated the half width of the 95% limits of agreement to be 4.7°, which means that a change of ?5° in cyclodeviation would be considered a real change. The threshold of 5° should be used when assessing change between two measurements made with double Maddox rods.

SUBMITTER: Liebermann L 

PROVIDER: S-EPMC5916581 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature

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Test-retest variability of cyclodeviations measured using the double Maddox rod test.

Liebermann Laura L   Leske David A DA   Hatt Sarah R SR   Holmes Jonathan M JM  

Journal of AAPOS : the official publication of the American Association for Pediatric Ophthalmology and Strabismus 20180106 2


The double Maddox rod test is often used to measure cyclodeviations and to monitor change over time. The purpose of this study was to estimate test-retest reliability and the amount of cyclodeviation that would be considered real change using 95% limits of agreement. We retrospectively studied 86 clinically stable patients with double Maddox rod measurements 5-175 days apart (median, 69 days). The range of cyclodeviation at the first measurement was 6° incyclodeviation to 15° excyclodeviation. W  ...[more]

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