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Table 3 Sensitivity analysis

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

Primary outcome No. studies No. patients Rate (%) (Covered⁄Uncovered) RR⁄WMD (95% CI) P-value
High quality studies(Star ≥ 5)  
Technical success rate 7 675 99.0/100 0.99 [0.98, 1.01] 0.51
Clinical success rate 6 650 91.4/85.8 1.04 [0.98, 1.11] 0.18
Post-stenting GOOSS 6 451 - −0.01 [−0.52, 0.50]* 0.96
Stent pantency 5 590 - −0.05 [−1.50, 1.39]* 0.94
Stent migration 7 662 16.3/3.3 3.49 [1.92, 6.32] <0.0001
Stent obstruction 7 662 6.8/20.4 0.39 [0.18, 0.84] 0.02
Overall complications 6 508 50.0/44.7 1.11 [0.86, 1.44] 0.43
Reintervention rate 6 600 21.3/16.3 1.30 [0.92, 1.83] 0.13
Studies containing ≥ 70 patients  
Technical success rate 5 660 98.9/100 1.00 [0.98, 1.01] 0.53
Clinical success rate 4 528 92.6/84.6 1.08 [0.99, 1.18] 0.08
Post-stenting GOOSS 3 304 - 0.26 [−0.05, 0.48]* 0.06
Stent pantency 4 528 - 0.62 [−0.06, 1.18]* 0.07
Stent migration 5 647 20.1/4.3 4.00 [2.05, 7.80] <0.0001
Stent obstruction 5 647 6.6/20.6 0.35 [0.17, 0.74] 0.006
Overall complications 4 493 53.9/43.6 1.22 [0.99, 1.51] 0.06
Reintervention rate 4 515 21.7/17.7 1.25 [0.88, 1.78] 0.21
  1. R, retrospective trial; P, prospective trial; RCT, randomized control trial.
  2. *, WMD (95%CI).
  3. GOOSS, gastric outlet obstruction scoring system.