Effect of sex on the outcomes of peroral endoscopic myotomy for the treatment of achalasia

Table 1 Baseline characteristics of the cases, mean ± SD/n (%)

Characteristics	Total (n = 526)	Male (n = 238)	Female (n = 288)	P value
Age, year	45.01 ± 13.78	43.23 ± 13.54	46.48 ± 13.82	0.007
BMI, Kg/m2	21.49 ± 3.23	22.27 ± 3.29	20.85 ± 3.04	< 0.001
Course of disease, month (median IQR)	48 (24, 120)	48 (22.5, 120)	48 (24, 96)	0.584
ASA classification	Total (n = 496)	Male (n = 221)	Female (n = 275)	0.506
1	55 (11.1)	23 (10.4)	32 (11.6)
2	428 (86.3)	191 (86.4)	237 (86.2)
3	13 (2.6)	7 (3.2)	6 (2.2)
Chicago classification	Total (n = 437)	Male (n = 199)	Female (n = 238)	0.219
1	65 (14.9)	36 (18.1)	29 (12.2)
2	343 (78.5)	149 (74.9)	194 (81.5)
3	29 (6.6)	14 (7.0)	15 (6.3)
Follow-up period, month (median IQR)	41.0 (21.3, 64.6)	37.7 (19.9, 66.6)	43.0 (22.5, 64.3)	0.226
Previous treatment				0.584
Pneumatic dilation	58 (11.03)	29 (12.18)	29 (10.07)
Botox injection	27 (5.13)	10 (4.20)	17 (5.90)
laparoscopic heller myotomy	11 (2.09)	6 (2.52)	5 (1.74)
Tunnel length, cm (median IQR)	12 (10, 12)	12 (9.75, 12)	12 (10, 12)	0.074
Myotomy length, cm (median IQR)	7 (5.6, 9)	7 (6, 9)	7 (6, 9)	0.492
Myotomy length of esophagus, cm (median IQR)	5 (4.7)	5 (4, 7)	5 (4, 7)	0.369
Myotomy length of stomach, cm (median IQR)	2 (2, 2)	2 (2, 2)	2 (2, 2)	0.948

BMI: Body mass index; ASA: American Society of Anesthesiologists; IQR: Interquartile range.