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Table 1 Characteristics of the included studies

From: Covered versus uncovered self-expandable metallic stents for palliation of malignant gastric outlet obstruction: a systematic review and meta-analysis

Study author Year Design Study interval (y) Patients (n) covered/uncovered Age (M, y) covered/uncovered Female (n, %) Disease diagnosis (n) Matching Quality score (*)
Yu Kyung Cho [5] 2004 RCT NR 13/12 65.0§ 12(48%) GC(25) 1,2,3 *****
Jong Pil Im [6] 2008 R 2005-2006 24/18 60.7§ 7(16%) GC(26)/PC(12) /Others(13) NR ****
Seungmin Bang [7] 2008 R 1998-2003 53/79 58.0/59.0 40(30%) GC(109)/PC(13) /Others(12) NR ***
Iruru Maetani [12] 2009 R 1998-2006 29/31 70.6/72.2 27(45%) GC(28)/PC(20)/ Others(12) 1,2,3,4,5 *****
Kee Myung Lee [13] 2009 P 1998-2007 70/84 67.2/63.3 48(31%) GC(122)/PC(19) /Others(13) 1,2,3,5 *****
Chan Gyoo Kim [14] 2010 RCT 2003-2007 40/40 58.0/57.0 17(21%) GC(80) 1,2,3,4,5 ******
Chan Ik Park [15] 2012 R 2006-2011 96/128 64.0/65.0 15(17%) GC(224) 1,2,5 *****
Iruru Maetani [16] 2013 RCT 2007-2010 31/31 69.4/68.1 32(52%) GC(27)/PC(26) /Others(9) 1,2,3,4,5 ******
Sang Myung Woo [17] 2013 R 2003-2010 24/46 62.0/61.0 30(43%) PC(46) /Others(24) 1,2,3,4,5 *****
  1. R, retrospective; P, prospective; RCT, randomized control trial; NR, not reported.
  2. §, mean age of all patients; (*), star rating (max 9).
  3. Matching: 1, age; 2, sex; 3, diagnosis; 4, site of obstruction; 5, previous treatment.
  4. GC, gastric cancer; PC, pancreatic cancer.
  5. Others, including gallbladder cancer, bile duct cancer, ampullary cancer, duodenal cancer and metastasis.