Demographic and clinical characteristics of patients in the overall CSEMS and UCSEMS groups
| CSEMS | UCSEMS | P value | |
| n=182 | n=184 | ||
| Sex | |||
| Male | 98 (53.8) | 107 (58.2) | 0.41 |
| Female | 84 (46.2) | 77 (41.8) | |
| Age, years | 73.5 (35–97) | 72 (43–96) | 0.99 |
| Tumour diagnosis | 0.93 | ||
| Pancreatic cancer | 89 (48.9) | 90 (48.9) | |
| Gastric cancer | 57 (31.3) | 61 (33.2) | |
| Gallbladder cancer | 10 (5.5) | 12 (6.5) | |
| Other | 26 (14.3) | 21 (11.4) | |
| Tumour type | |||
| Intrinsic | 64 (35.2) | 65 (35.3) | 0.97 |
| Extrinsic | 118 (64.8) | 119 (64.7) | |
| Stenotic site | |||
| Stomach | 63 (34.6) | 59 (32.1) | 0.60 |
| Duodenum | 119 (65.4) | 125 (67.9) | |
| D1 (bulb) | 50 (27.5) | 47 (25.5) | |
| D2 (second portion) | 31 (17.0) | 35 (19.0) | |
| D3 (third portion) | 35 (19.2) | 38 (20.7) | |
| D4 (fourth portion) | 3 (1.6) | 5 (2.7) | |
| GOOSS score before SEMS placement | |||
| 0 | 82 (45.1) | 95 (51.6) | 0.21 |
| 1 | 100 (54.9) | 89 (48.4) | |
| Performance status | |||
| 0 | 49 (26.9) | 62 (33.6) | 0.22 |
| 1 | 80 (44.0) | 65 (35.3) | |
| 2 | 53 (29.1) | 57 (30.9) | |
| Stage | |||
| IV | 167 (91.8) | 164 (89.1) | 0.72 |
| III | 12 (6.6) | 16 (8.7) | |
| Other | 3 (1.6) | 4 (2.2) | |
| Chemotherapy after SEMS placement | 66 (36.3) | 70 (38.0) | 0.72 |
Data are presented as n (%) or median (range).
CSEMS, covered self-expandable metal stent; GOOSS, gastric outlet obstruction scoring system; SEMS, self-expandable metal stent; UCSEMS, uncovered self-expandable metal stent.