Longitudinal Relationship between Plasma Reactive Oxygen Metabolites and Periodontal Condition in the Maintenance Phase of Periodontal Treatment

Table 5

Pearson’s correlation coefficients between change of CAL and the independent variables in the subjects with high oxidative status (>380 CARR U) (N = 22).

Independent variables	𝑟^∗ between ΔCAL and the independent variables	P value
Variables at baseline
Age (years)	−0.075	0.742
Teeth present (n)	0.152	0.500
PPD (mm) at baseline	−0.531	0.011
CAL (mm) at baseline	−0.228	0.308
BOP (%) at baseline	0.092	0.683
PCR (%) at baseline	0.233	0.298
ROM (CARR U) at baseline	0.032	0.887
BAP (μmol/L) at baseline	−0.044	0.845
Differences of variables
ΔTeeth present (n)	−0.352	0.108
ΔPPD (mm)	0.576	0.005
ΔBOP (%)	−0.235	0.293
ΔPCR (%)	−0.358	0.102
ΔROM (CARR U)	−0.075	0.741
ΔBAP (μmol/L)	−0.256	0.249

Δ represents differences (value at follow-up minus value at baseline).
*Pearson’s correlation coefficients.
N: number; SD: standard deviation; PPD: probing pocket depth; CAL: clinical attachment level; BOP: bleeding on probing; PCR: plaque control record; ROM: reactive oxygen metabolites; CARR U: Carratelli units; and BAP: biologic antioxidant potential.