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Table 1 Demographic characteristics of enrolled patients

From: Premedication with reformulated simethicone and sodium bicarbonate improves mucosal visibility during upper gastrointestinal endoscopy: a double-blind, multicenter, randomized controlled trial

  Group A (n = 354) Group B (n = 169) P value
Age, mean ± SD (years) 48.5 ± 13.2 47.5 ± 12.7 0.487
Sex, n    1.000
 Male 201 96  
 Female 153 73  
Indication    0.338
 No obvious symptom 68 37  
 Screening 64 33  
 H. plori infection 3 4  
 Increased serum tumor marker 1 0  
 Acid regurgitation 22 6  
 Dyspepsia 182 79  
 Abdominal pain or discomfort 62 40  
 Vomit 1 0  
 Constipation 0 1  
 Dysphagia 1 0  
 Gastrointestinal bleeding 10 4  
 Distention 8 2