Caroliene Meijndert

122 Chapter 7 agreement between the two reviewers’ judgements, κ=0.76, (93.9% agreement) at title/ abstract selection. At full text selection, this agreement was also substantial, κ=0.75, (91.4% agreement). There was no need to consult the third reviewer in any of the study selection phases. Figure 1. Study identification and selection process. Description of the selected studies The search results yielded 24 non-randomised clinical trials (nRCTs) and 20 randomised clinical trials (RCTs). The studies’ median follow-up was 1 [1;5] year (ranging from 1-10 years). Detailed data from the included studies is listed in Table 2 . If an article reported data on two groups, but the same connection type was used, the groups were pooled. When an article reported data from two groups with different connection types, the groups were viewed separately. Consequently, a total of 31 groups (1105 implants) had PS-conical connections, 5 groups (124 implants) had a PS-parallel connection, and 12 groups (356 implants) had a PM-parallel connection.