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Table 5 Correlations between PPD and characteristics

From: Correlations between clinical parameters in implant maintenance patients: analysis among healthy and history-of-periodontitis groups

Characteristics H group correlation (R s ) HP group correlation (R s )
Age 0.040 n.s. 0.209*
Number of teeth (at the beginning of implant treatment) 0.027 n.s. − 0.355**
Number of extracted teeth 0.369* 0.284**
Maintenance period (month) 0.193 n.s. 0.234*
  1. n.s. not significant, * p < 0.05, **p < 0.01