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Table 1 Comparisons between Transdermal Fentanyl and Sustained-release Oral Morphine

From: Efficacy and adverse effects of transdermal fentanyl and sustained-release oral morphine in treating moderate-severe cancer pain in Chinese population: a systematic review and meta-analysis

Endpoints No. of patients/studies RR (95% CI)a Pb Phc
Remission rate 2491/30 1.13 (0.92, 1.38) 0.23 1.00
Constipation 2593/31 0.35 (0.27, 0.45) < 0.00001 < 0.00001
Nausea/vomiting 2593/31 0.57 (0.49, 0.67) < 0.00001 0.009
Vertigo/somnolence 2300/28 0.59 (0.51, 0.68) < 0.00001 0.08
  1. a RR, relative risk; 95% CI, 95% confidence interval
  2. b p value of significance tests of RR = 1
  3. c p value of heterogeneity tests