2.

各组患者不同反流模式的反流次数比较

Comparison of the number of reflux episodes with different reflux patterns among the 3groups [median (P25, P75)]

Number of different reflux episodes	NERD	RH	FH	χ2	P
Acid reflux episodes	23 (14, 37)	12 (6, 17)	4 (0, 14)	25.292	0.000*
Weakly acid reflux episodes	18 (11, 33)	20 (12, 38)	17 (6, 26)	2.833	0.243
Weakly alkaline reflux episodes	1 (0, 3)	5 (0, 14)	4 (0, 8)	7.692	0.021*
Total reflux episodes	43 (30, 63)	45 (30, 71)	27 (15, 47)	8.031	0.018*
Liquid reflux episodes	14 (3, 26)	11 (6, 22)	9 (3, 12)	4.928	0.085
Mixed reflux episodes	34 (24, 42)	34 (19, 60)	18 (8, 36)	6.246	0.044*
Gas reflux episodes	28 (16, 61)	24 (20, 41)	33 (20, 59)	0.679	0.712