Table 1.
Characters of randomization methods, allocation concealment and blinding of included RCTs
| 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 |
* Proportion of adequate comparison of Chinese with foreign