Table 4. Spearman's rank correlation between the investigated parameters.

Parameters	API	BoP	PD	Age (years)	Number of teeth
Age at the start of hemodialysis	0.25*	0.34*	0.41*	0.91*	(-)0.52*
Duration of hemodialysis therapy (months)	-0.05	-0.01	-0.06	0.02	0.00
Serum C-reactive protein (mg/L)	0.07	-0.03	0.09	0.24*	(-)0.23*
Serum albumin (g/dL)	0.05	-0.09	(-)0.20*	(-)0.42*	0.11
Serum calcium (mg/dL)	0.11	-0.09	0.12	0.06	-0.07
Serum phosphorus (mg/dL)	-0.17	-0.15	-0.19	(-)0.26*	0.08
Serum alkaline phosphatase (UI/L)	-0.11	-0.09	0.04	-0.12	0.05
Parathormone (pg/mL)	-0.10	0.00	-0.03	-0.08	0.11

^*Correlation coefficients were statistically significant at p=0.05

API: approximal plaque index; BoP: bleeding on probing index; PD: pocket depth