Esophagogastroduodenoscopy with conscious sedation does not interfere with catheter-based 24-h pH monitoring

Table 2 Comparisons between Period I and Period II in group A patients (mean ± SD)

Variables	Period I	Period II	P value1
Frequency of symptom (episodes/h)	0.04 ± 0.10	0.03 ± 0.06	0.29
Pharyngeal probe
Total time of pH < 4 (%)	0.03 ± 0.10	0.23 ± 0.85	0.21
Mean frequency of reflux (episodes/h)	0.07 ± 0.23	0.29 ± 0.98	0.22
Patients with long reflux	0	0	1
Esophageal probe
Total time of pH < 4 (%)	0.96 ± 1.89	1.11 ± 2.57	0.55
Mean frequency of reflux (episodes/h)	0.74 ± 1.51	0.81 ± 1.76	0.55
Patients with long reflux	1 (2.8%)	5 (13.9%)	0.22

¹Statistical significance was defined as a P < 0.05.