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STUDY ON INTEROBSERVER AGREEMENT IN A GOITRE PREVALENCE SURVEY.

P B Pillai1, G S Saiprasad1, D R Basannar2

  • 1Reader, Dept of PSM, AFMC, Pune 411 040.

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Interobserver agreement in goitre detection among trained teams was assessed. The study found good agreement, suggesting reliable goitre prevalence surveys in school children.

Keywords:
Confidence intervalsEpidemiologic methodsHealth surveysObserver variation

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Area of Science:

  • Public Health
  • Epidemiology
  • Medical Diagnostics

Background:

  • Subjective assessment of physical signs can lead to observer variation.
  • Goitre prevalence surveys require consistent diagnostic criteria for accuracy.

Purpose of the Study:

  • To estimate interobserver agreement in goitre detection among trained teams.
  • To evaluate the acceptability of observer agreement in a school-based goitre survey.

Main Methods:

  • Four teams of trained observers conducted a goitre prevalence survey in school students.
  • Interobserver agreement was measured using the kappa coefficient and proportion of agreement.
  • The proportion of agreement was analyzed to distinguish between normality and abnormality (goitre presence).

Main Results:

  • The proportion of agreement for abnormality (goitre presence) ranged from 0.62 to 0.83.
  • This range indicates good interobserver agreement in goitre detection during the survey.

Conclusions:

  • The study demonstrates good interobserver agreement in goitre detection using trained observers.
  • Proportion of agreement is a valuable metric for assessing observer reliability in goitre surveys.
  • Findings support the reliability of this goitre prevalence survey methodology.