Table 1 A table demonstrating key characteristics of the studies selected for review
Author | Study design | Sample size | Follow up (mean range) | Number of patients lost to follow up | Final study sample size | Quality assessment score | Judgement risk on bias |
|---|---|---|---|---|---|---|---|
Berend et al. (2004)—CORR | Case series | 8598 (5535) from database | 5 years 2–14.2 years | 3152 (2125). 41 tibial failures were analysed | AHRQ—All four factors were present | Low risk | |
Fang et al. (2009)—J Arthro | Case series | 6070 (3992) from database | 6.6 years 2–22.5 years | 1118 (28.0 %) patients died | 6277 | AHRQ—All four factors were present | Low risk |
Ritter et al. (2011)—JBJS | Case series | 9483 | 7.6 ± 3.8 years 2–22.5 years | 3404 | 6079 | AHRQ—All four factors were present | Low risk |
Kim et al. (2014)—international orthopaedics | Case series | 3150 | 15.8 years 11–18 years | 102 | 3048 | AHRQ—three out of four factors present | Low risk |
Morgan et al. (2008)—international orthopaedics | Case series | 197 | 9 years | No mention | 197 | AHRQ—two out of four factors present | Unclear/high risk |
Parratte et al. (2010)—JBJS | Case control | 417 | Minimum 15 years | 19 | 398 | Ottawa—Newcastle score eight | Low risk |
Bonner et al. (2011)—JBJS | Case control | 501 | 9.8 years ?–15 years | 184 (died before last review, however, survival data included in analysis) | 458 | Ottawa—Newcastle score seven | Low risk |
Magnussen et al. (2011)—CORR | Case control | 608 | Median 4.7 years 2–19.8 years | 55 | 553 | Ottawa—Newcastle score seven | Low risk |