Table 1.

Baseline clinical and manometry characteristics.

Characteristics	Training data (n = 142)	Test data (n = 62)	P value
8 mmHg model
Sex (male/female)	23/119 (19.3%)	13/49 (26.5%)	0.429
Pressure gradient <8 mmHg (yes/no)	60/82 (73.2%)	26/36 (72.2%)	1.000
Age at manometry, years	36.0 (28.0, 44.0)	35.5 (29.0, 44.8)	0.990
Body mass index, kg/m2	26.2 (23.6, 30.0)	27.9 (25.7, 29.9)	0.118
Pressure gradient, mmHg	10.8 (3.00, 15.9)	10.0 (3.00, 14.0)	0.627
6 mmHg model
Sex (male/female)	26/116 (22.4%)	10/52 (19.2%)	0.842
Pressure gradient <6 mmHg (yes/no)	53/89 (59.6%)	23/39 (59.0%)	1.000
Age at manometry, years	36.0 (29.0, 44.0)	33.5 (27.0, 44.0)	0.202
Body mass index, kg/m2	27.5 (24.0, 30.0)	26.20 (23.8, 30.0)	0.343
Pressure gradient, mmHg	10.0 (3.00, 15.88)	8.00 (3.00, 13.00)	0.542