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The odds ratios of the presence of randomization, blinding and reporting significant results in the articles from high income countries to the reports from the other nations adjusted for the language of publication
| Adjusted OR(95% CI) | |
| Randomization: | |
| 1993 | 0.59(0.29 to 1.17) |
| 2003 | 0.64(0.29 to 1.36) |
| Blinding: | |
| 1993 | 1.93(0.99 to 3.74) |
| 2003 | 2.36(1.08 to 5.13) |
| Statistical Significance: | |
| 1993 | 1.17(0.58 to 2.34) |
| 2003 | 0.41(0.20 to 0.85) |
