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. 2021 Apr 30;27(2):231–239. doi: 10.5056/jnm20114

Figure 5.

Figure 5

Acidity of supragastric and gastric belches in the belching disorder (BD) and gastroesophageal reflux disease (GERD) groups. In supragastric belching (SGB), the ratio of acidic belches was significantly higher in the GERD group than in the BD group (median, 38.1% vs 8.9%, P < 0.05); the ratio of non-acidic SGB was significantly higher in the BD group. In gastric belching (GB), the ratio of acidic belching was also significantly higher in the GERD group than in the BD group (median: 49.2% vs 16.9%, P < 0.05).