This scientific paper studies the difficulty getting LPR diagnosed:
Title: Laryngopharyngeal reflux diagnosis: Factors associated with patient satisfaction
https://www.sciencedirect.com/science/article/pii/S0196070924002023
LPR – Laryngopharingeal Reflux is not yet classified in the ICD, the WHO – International Statistical Classification of Diseases and Related Health Problems (ICD).
In the paper mentioned above, a Consensus is mentioned, “the Dubai Definition”, that was
“The Dubai Definition and Diagnostic Criteria of Laryngopharyngeal Reflux: The IFOS Consensus”
https://onlinelibrary.wiley.com/doi/abs/10.1002/lary.31134
“Forty-eight international experts (otolaryngologists, gastroenterologists, surgeons, and physiologists) were included in a modified Delphi process to revise 48 statements about definition, clinical presentation, and diagnostic approaches to LPR. Three voting rounds determined a consensus statement to be acceptable when 80% of experts agreed with a rating of at least 8/10. Votes were anonymous and the analyses of voting rounds were performed by an independent statistician.”
“LPR was defined as a disease of the upper aerodigestive tract resulting from the direct and/or indirect effects of gastroduodenal content reflux, inducing morphological and/or neurological changes in the upper aerodigestive tract. LPR is associated with recognized non-specific laryngeal and extra-laryngeal symptoms and signs that can be evaluated with validated patient-reported outcome questionnaires and clinical instruments.”