Diagnostic value of contrast sensitivity test and conjunctival impression cytology for the detection of sub-clinical vitamin-a deficiency

Tjahyono D. Gondhowiardjo, I. Andriyani, Saukani Gumay, Widya Artini, R. A. Werdhana

Research output: Contribution to journalArticlepeer-review

Abstract

Results: A total of 109 subjects out of 154 elementary school children corresponding to the inclusion criteria were included in this study. Forty-four (41.9%) children were detected to have sub-clinical vitamin-A deficiency. The contrast sensitivity test had a sensitivity value of 45.5% and a specificity value of 50.8% with a positive predictive value of 40%. The area under the receiver operator characteristic (ROC) curve was 49.5% (95% CI 38.1%-60.9%), whereas the conjunctival impression cytology test had a sensitivity value of 90.9%, and a specificity value of 16.4% with a positive predictive value of 43.9%. The ROC area was 56.1% (95% CI 45.0% - 67.1%). Pearson’s analysis showed that there is no correlation between the two diagnostic tools (p 0.538).

Conclusion: The results of this study indicated that neither the contrast sensitivity test nor the conjunctival impression cytology was found to be a favorable screening tool to detect sub-clinical vitamin-A deficiency. Moreover, there is no correlation between the two methods.

Purpose: To determine whether or not contrast sensitivity test and conjunctival impression cytology can be used as diagnostic tools to detect sub-clinical vitamin-A deficiency; and if there is a correlation within the two diagnostic methods.

Methods: A series of diagnostic studies comprising of contrast sensitivity test, conjunctival impression examination and serum retinol concentration were performed on literate children, six to ten years old, at West Java Elementary School. All subjects underwent a basic eye examination. Sample size, receiver operator curve, negative and positive predictive values, sensitivity and specificity were calculated.

Original languageEnglish
Pages (from-to)131-140
Number of pages10
JournalAsian Journal of Ophthalmology
Volume13
Issue number4
Publication statusPublished - 2014

Keywords

  • Contrast sensitivity
  • Impression cytology
  • Sub-clinical vitamin-A deficiency

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