Table 2.

Wilcoxon signed-rank test

		Ranks
Reflux symptom score		N	Mean Rank	Sum of Ranks	p-value
post treatment score–pre-treatment score	Negative Ranks	200a	100.50	20,100.00	0.000 < 0.05 (Significant)
	Positive Ranks	0b	.00	.00
	Ties	0c
	Total	200

^apost treatment score < pre-treatment score

^bpost treatment score > pre-treatment score

^cpost treatment score = pre-treatment score