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Table 4 Risk of outcomes for THA vs HA using the data reported in the 3 reviews (RR, 95% CI), p value

From: A case study of binary outcome data extraction across three systematic reviews of hip arthroplasty: errors and differences of selection

Outcome HTA Cochrane BMJ
Dislocation 1 year: 1.70 (0.91, 3.19), p = 0.10 1 year: 1.71 (0.91, 3.21), p = 0.10  
13 years: 1.93 (1.10, 3.37), p = 0.02 13 years: 1.88 (1.08, 3.26), p = 0.03
Mortality at 1 year 0.85 (0.57, 1.29), p = 0.45 0.87 (0.57, 1.32), p = 0.51 0.80 (0.56, 1.14), p = 0.22
Required revision 1 year: 0.38 (0.18, 0.81), p = 0.01 1 year: 0.40 (0.18, 0.89), p = 0.02  
13 years: 0.33 (0.17, 0.64), p = 0.001   13 years: 0.47 (0.22, 1.01)*, p = 0.05
  1. A random effects model was used for all analyses. Statistical heterogeneity of I2 = 0% for all analyses, except where specified.
  2. *I2 = 23%; THA, Total Hip Arthroplasty; HA, Hemiarthroplasty; RR, Risk ratio; CI, Confidence Interval.
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