Thresholds of gastroesophageal reflux for diagnosis of esophageal reflux diseases

Table 3 Correlations between the percentages of the time with pH fluctuations/reflux episodes and the total duration and numbers of episodes

Group	Total duration		Total number
	r	P	r	P
Gastroesophageal reflux patients with esophagitis
Time (%) with pH fluctuations	0.92	< 0.01	0.53	< 0.01
Time (%) with reflux episodes	0.67	< 0.01	0.65	< 0.01
GER patients without esophagitis
Time (%) with pH fluctuations	0.88	< 0.01	0.29	> 0.05
Time (%) with reflux episodes	0.42	< 0.05	0.45	< 0.01
Controls
Time (%) with pH fluctuations	0.98	< 0.01	0.82	< 0.01
Time (%) with reflux episodes	0.62	< 0.01	0.46	< 0.05

^*Total duration: duration of pH fluctuations + duration of reflux episodes; Total numbers: numbers of pH fluctuations + numbers of reflux episodes.