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Table 1 Overview on the event rate (with lower and upper limits, z value), weight and significance (p values) for conventional approach and random effect

From: Membrane perforation rate in lateral maxillary sinus floor augmentation using conventional rotating instruments and piezoelectric device—a meta-analysis

Conventional Event rate Lower limit Upper limit z value p value Weight
Galindo-Moreno et al. 2007 [15] 0.005 0.000 0.076 − 3.726 0.000 0.445
Marchetti et al. 2007 [16] 0.010 0.001 0.143 − 3.218 0.001 0.443
Delibasi et al. 2013 [67] 0.043 0.006 0.252 − 3.023 0.003 0.753
van den Bergh et al. 1998 [5] 0.048 0.016 0.140 − 5.033 0.000 1.507
Krekmanov et al. 1995 [17] 0.071 0.030 0.160 − 5.527 0.000 1.870
Watzek et al. 1998 [18] 0.100 0.038 0.238 − 4.169 0.000 1.683
Zijderveld et al. 2008 [19] 0.102 0.059 0.171 − 7.153 0.000 2.394
Papa et al. 2005 [20] 0.105 0.054 0.197 − 5.726 0.000 2.162
Rickert et al. 2011 [73] 0.111 0.042 0.261 − 3.921 0.000 1.673
Rickert et al. 2013 [10] 0.111 0.042 0.261 − 3.921 0.000 1.673
Lindenmüller and Lambrecht 2006 [21] 0.112 0.063 0.191 − 6.462 0.000 2.343
Penarrocha-Diago et al. 2012 [22] 0.125 0.048 0.289 − 3.640 0.000 1.661
Kaptein et al. 1998 [23] 0.159 0.097 0.251 − 5.713 0.000 2.438
Cha et al. 2014 [24] 0.161 0.118 0.216 − 8.932 0.000 2.765
Tawil et al. 2001 [25] 0.167 0.071 0.343 − 3.285 0.001 1.791
Yilmaz et al. 2012 [26] 0.172 0.098 0.284 − 4.746 0.000 2.305
Cho et al. 2001 [27] 0.184 0.098 0.317 − 4.043 0.000 2.178
van den Bergh et al. 2000 [28] 0.200 0.093 0.379 − 3.037 0.002 1.894
Becker et al. 2008 [68] 0.204 0.154 0.265 − 7.779 0.000 2.791
Ewers et al. 2005 [29] 0.206 0.156 0.266 − 7.894 0.000 2.801
Aimetti et al. 2001 [30] 0.214 0.100 0.402 − 2.821 0.005 1.881
Hernández-Alfaro et al. 2008 [69] 0.219 0.184 0.259 − 11.435 0.000 2.934
Barone et al. 2008 [31] 0.231 0.076 0.522 − 1.829 0.067 1.346
Khoury et al. 1999 [3] 0.241 0.188 0.302 − 7.217 0.000 2.831
Barone et al. 2006 [32] 0.250 0.182 0.334 − 5.297 0.000 2.701
Raghoebar et al. 2001 [33] 0.258 0.200 0.327 − 6.230 0.000 2.805
Kim et al. 2011 [34] 0.259 0.129 0.453 − 2.391 0.017 1.948
Shlomi et al. 2004 [35] 0.274 0.184 0.387 − 3.714 0.000 2.533
Wannfors et al. 2000 [36] 0.275 0.159 0.432 − 2.738 0.006 2.228
Hallman et al. 2004 [37] 0.300 0.164 0.483 − 2.127 0.033 2.080
Bornstein et al. 2008 [38] 0.305 0.201 0.433 − 2.911 0.004 2.466
Ardekian et al. 2006 [39] 0.318 0.238 0.411 − 3.723 0.000 2.709
Kazancioglu et al. 2013 [40] 0.320 0.169 0.522 − 1.758 0.079 1.982
Raghoebar et al. 1999 [41] 0.321 0.249 0.403 − 4.129 0.000 2.775
Philippart et al. 2003 [42] 0.333 0.158 0.571 − 1.386 0.166 1.761
Scarano et al. 2015 [43] 0.333 0.131 0.624 − 1.132 0.258 1.455
Oh et al. 2011 [44] 0.343 0.276 0.416 − 4.085 0.000 2.830
Raghoebar et al. 1997 [45] 0.346 0.250 0.455 − 2.731 0.006 2.623
Jensen et al. 1994 [46] 0.352 0.274 0.438 − 3.307 0.001 2.764
Froum et al. 2013 [47] 0.375 0.240 0.532 − 1.564 0.118 2.320
Stricker et al. 2003 [48] 0.379 0.271 0.501 − 1.950 0.051 2.560
Levin et al. 2004 [49] 0.468 0.362 0.578 − 0.562 0.574 2.648
Schwartz-Arad et al. 2004 [4] 0.469 0.364 0.578 − 0.555 0.579 2.657
Papa et al. 2009 [50] 0.511 0.371 0.649 0.146 0.884 2.437
Kasabah et al. 2003 [6] 0.562 0.480 0.640 1.486 0.137 2.812
Krennmair et al. 2007 [51] 0.575 0.420 0.717 0.945 0.345 2.343
Random 0.240 0.205 0.278 − 11.262 0.000