Table 1.

Symptom Improvement After Initial Treatment of Achalasia by Therapeutic Endoscopy (Adapted from Campos et al. [66])

Treatment	Number of studies	Number of patients	Symptom improvement at (numbers are meana % and range)
			≤1 months	3 months	6 months	≥12 months	≥36 months
Endoscopic injection of botulinum toxin	9	315	78.7 (64–93)	70.0 (55–83)	53.3 (44–57)	40.6 (10–55)	n/a
Endoscopic pneumatic balloon dilation	15	1,065	84.8 (56–97)	n/a	73.8 (51–97)	68.2 (38–90)	58.4 (33–70)

n/a data were not recorded for these time points in the studies used to compile the systematic review and meta-analysis

^aWeighted averages of the sample prevalence in each of the studies, with weights equal to the number of patients