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Related Experiment Video

Updated: Apr 29, 2026

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Insights Into Retrograde Cricopharyngeus Dysfunction (R-CPD) Through Analysis of Internet Search Pattern.

Hardeep S Tiwana1, Xiang Yu Gao1, Kevin J Fujita-Howie2

  • 1Elson S. Floyd College of Medicine at Washington State University Spokane Washington USA.

Laryngoscope Investigative Otolaryngology
|April 28, 2026
PubMed
Summary

Public awareness of retrograde cricopharyngeus dysfunction (R-CPD) has significantly increased since its formal description. Internet search trends show a rise in R-CPD-related queries, particularly in metropolitan areas.

Keywords:
Google trendsR‐CPDinability to burpinternet search behaviorpublic awarenessretrograde cricopharyngeus dysfunction

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Area of Science:

  • Medical research
  • Public health
  • Digital epidemiology

Background:

  • Retrograde cricopharyngeus dysfunction (R-CPD) is a condition affecting the ability to belch.
  • Public awareness and understanding of R-CPD have been limited.
  • Analyzing internet search trends can provide insights into public interest and awareness of medical conditions.

Purpose of the Study:

  • To evaluate public awareness and interest in R-CPD within the United States.
  • To analyze internet search behavior trends related to R-CPD.
  • To correlate search trends with the official description of R-CPD.

Main Methods:

  • Utilized Google Trends to collect data on R-CPD-related search queries from January 2013 to May 2024 in the U.S.
  • Compared average relative search volume (RSV) from 2013-2018 (pre-definition) with 2019-2024 (post-definition).
  • Employed paired t-tests to determine statistical significance (p < 0.05).

Main Results:

  • A 116% increase in RSV for "R-CPD" was observed post-definition (p < 0.002).
  • Significant increases in searches for related symptoms like "why can't I burp" and "no burp" were noted (p < 0.002).
  • Higher search volumes were consistently found in metropolitan areas compared to broader regions.

Conclusions:

  • Internet search interest in R-CPD has markedly increased following its formal description.
  • This suggests growing public awareness and information-seeking regarding R-CPD.
  • Elevated search activity in urban centers may indicate greater recognition or access to care in these areas.