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Table 1 Characters of randomization methods, allocation concealment and blinding of included RCTs

From: Quality assessment of reporting of randomization, allocation concealment, and blinding in traditional chinese medicine RCTs: A review of 3159 RCTs identified from 260 systematic reviews

Item Chinese Foreign Total χ2* P
  Adequate Inadequate n Adequate Inadequate n Adequate Inadequate N   
  (%) (%)   (%) (%)   (%) (%)    
randomization methods 239(9) 2341(91) 2580 142(25) 437(75) 579 381(12) 2778(88) 3159 103.8 0.000
allocation concealment 56(2) 2524(98) 2580 151(26) 428(74) 579 207(7) 2952(93) 3159 441.4 0.000
blinding 252(10) 2328(90) 2580 349(60) 230(40) 579 601(19) 2558(81) 3159 783.1 0.000
randomization method + allocation concealment 39(2) 2541(98) 2580 91(16) 488(84) 579 130(4) 3029(96) 3159 241.8 0.000
randomization method + allocation concealment + blinding 33(1) 2547(99) 2580 67(12) 512(88) 579 100(3) 3059(97) 3159 163.4 0.000
  1. * Proportion of adequate comparison of Chinese with foreign