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Table 4 Z-score for two population proportions

From: Early postoperative compilations of bone filling in curettage defects

  Our rates (%) n Literature rates (%) N Z-score P value
Allograft 2.70 74 3.24 401 − 0.244 0.810
Bone graft substitute
 Calcium sulfate    6.52 138 − 0.849 0.395
 Calcium phosphate 4.13 121 3.48 661 0.355 0.719
 All    4.21 950 − 0.040 0.968
PMMA 7.41 54 5.59 483 0.543 0.589