Table 1 The demographic data of patients in each group
|  | The NHF group N = 37 | The LFO group N = 38 |
|---|---|---|
Age (years) | 71.0 (43.0 to 83.0) | 71.5 (35.0 to 83.0) |
Sex, male | 23 (62.0%) | 23 (61.0%) |
Weight (kg) | 59.6 (31.3 to 79.2) | 57.2 (39.6 to 104.3) |
BMI (kg/m2) | 22.4 (15.0 to 30.6) | 21.9 (15.9 to 36.3) |
Any tobacco use | 21 (57.0%) | 26 (68.0%) |
FEV1.0% (%) | 76.2 (63.1 to 100.0) | 76.0 (53.2 to 90.9) |
Details of treatment | ||
 Detailed examination | 10 (27.0%) | 6 (15.8%) |
 Stent related (stenting or removal or replacement) | 18 (48.6%) | 20 (52.6%) |
 Endoscopic lithotripsy | 9 (24.3%) | 12 (32.6%) |
Patients with surgically altered anatomy | ||
 DG + Billroth II | 0 (0%) | 1 (2.6%) |
 DG or TG + Roux-en-Y | 2 (5.4%) | 4 (10.5%) |
 PD | 1 (2.7%) | 3 (7.9%) |
 The presence of BAE-ERCP | 3 (8.1%) | 7 (18.4%) |