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Website quality indicators for consumers.

Kathleen M Griffiths1, Helen Christensen

  • 1Depression & Anxiety Consumer Research Unit, Centre for Mental Health Research, The Australian National University, Canberra, Australia. kathy.griffiths@anu.edu.au

Journal of Medical Internet Research
|January 13, 2006
PubMed
Summary
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The DISCERN tool effectively assesses health information quality for both consumers and professionals, correlating well with evidence-based standards. Google PageRank also shows promise as an automated quality indicator for websites.

Area of Science:

  • Health Informatics
  • Web Science
  • Information Quality Assessment

Background:

  • The DISCERN tool was developed for consumers to evaluate health information quality.
  • Existing evidence suggests DISCERN's validity for evidence-based website quality assessment by health professionals.
  • The validity of DISCERN for consumers and the practicality of its length and training requirements remain unconfirmed.
  • Alternative, simpler indicators like Google PageRank warrant investigation for assessing website quality.

Purpose of the Study:

  • To determine if the DISCERN instrument is a valid indicator of evidence-based web content quality for consumers without specialized mental health training.
  • To assess whether Google PageRank serves as an indicator of website content quality, benchmarked against an evidence-based gold standard.

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Main Methods:

  • A cross-sectional survey design was employed, evaluating depression websites.
  • Evaluations were conducted by both consumers and health professionals.
  • Key outcome measures included site characteristics, evidence-based content quality (using depression guidelines), DISCERN scores, Google PageRank, and user satisfaction.

Main Results:

  • Significant associations were found between evidence-based quality ratings and DISCERN scores for both consumers (r = 0.62, P = .001) and health professionals (r = 0.80, P < .001).
  • Consumer and health professional DISCERN ratings demonstrated strong correlation (r = 0.77, P < .001).
  • Evidence-based quality scores correlated with Google PageRank (r = 0.59, P = .002), though DISCERN scores showed a higher correlation with user satisfaction than Google PageRank.

Conclusions:

  • The DISCERN tool demonstrates potential as a reliable indicator of content quality, applicable for both expert and consumer use.
  • Google PageRank emerges as a promising automated metric for assessing website quality.