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Saliva Secretion Is Significantly Lower in Female Patients with Mild Reflux Esophagitis than in Female Healthy Controls.

Digestion 2023 Februrary 8
INTRODUCTION: Saliva secretion is significantly lower in patients with mild reflux esophagitis than in healthy controls. A previous study on healthy controls showed that stimulated saliva secretion was lower in females than in males. Saliva secretion may be lower in female patients with mild reflux esophagitis than in male patients. Therefore, the present study investigated sex differences in saliva secretion in patients with mild reflux esophagitis.

METHODS: Twenty-five male patients with mild reflux esophagitis, 25 male healthy controls, 24 female patients with mild reflux esophagitis, and 24 female healthy controls were recruited for this case-control study. Saliva secretion was assessed as follows: each patient chewed sugar-free gum for 3 minutes prior to endoscopy, and the volume and pH of saliva before and after acid loading as an index of the acid-buffering capacity were measured.

RESULTS: No significant differences were observed in the amount of stimulated saliva secretion, salivary pH, or the acid-buffering capacity between male patients with mild reflux esophagitis and healthy controls. No significant differences were noted in salivary pH between female patients with mild reflux esophagitis and healthy controls; however, the amount of stimulated saliva secretion was significantly lower (p = 0.0023) in the former (2.5 [1.9-4.1]) than in the latter (4.6 [3.2-6.6]), while the acid-buffering capacity was slightly lower (p = 0.0578) in the former (5.9 [5.7-6.2]) than in the latter (6.2 [6.0-6.5]).

CONCLUSION: The amount of stimulated saliva secretion was significantly lower in female patients with mild reflux esophagitis than in female healthy controls. This reduction in saliva secretion may affect the pathophysiology of mild reflux esophagitis in females.

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