Is GERD a risk factor for laryngeal cancer?

Area of Science:

• Otolaryngology
• Gastroenterology
• Oncology

Background:

• The association between gastroesophageal reflux disease (GERD) and laryngeal cancer remains controversial.
• Disparate study findings necessitate a comprehensive evaluation of the existing literature.

Purpose of the Study:

• To conduct a meta-analysis to determine the overall strength of the association between GERD and laryngeal cancer.
• To synthesize evidence from original studies to clarify the role of GERD in laryngeal carcinogenesis.

Main Methods:

• A systematic literature search was performed across Ovid Medline, EMBASE, and Cochrane databases (1966-June 2004).
• Inclusion criteria required original controlled study designs with clear documentation of reflux prevalence in cases and controls.
• Four studies met the inclusion criteria for the meta-analysis, with statistical analysis performed using NCSS software.

Main Results:

• Fifteen studies were initially identified, but only four qualified for meta-analysis due to methodological limitations and data duplication.
• Significant heterogeneity was observed among the included studies regarding confounding factors (smoking, alcohol) and GERD diagnosis.
• The pooled odds ratio for the association between GERD and laryngeal cancer was 2.86 (fixed-effects) and 2.37 (random-effects).

Conclusions:

• The meta-analysis suggests that GERD is a potential significant risk factor for laryngeal cancer.
• Heterogeneity in the published data highlights the need for high-quality, prospective, controlled studies to further validate this association.