Correlation between Measured Parameters of Risk and Prognosis in Subjects with Chronic Periodontitis

Abstract

Aims: In most of the cases, clinical parameters associated with poor prognosis are the same as the factors associated with increased risk, but
the relationship between risk and prognosis remains unclear. The objective of this study was to evaluate the correlation between measured
parameters of predictive risk and prognosis in subjects with chronic periodontitis.
Materials and methods: Three hundred subjects participated in the study. Modified periodontal risk assessment (MPRA) model was used to
assess the risk and prognosis was evaluated by using McGuire and Nunn prognostic criteria.
Results: Among the subjects, 57.3%, 38%, and 4.7% were categorized as having high, low, and medium risk, respectively. Assessment of prognosis
among study subjects showed that 38.0%, 24.0%, 17.7%, 17.0%, 2.0%, and 1.3% had good, fair, excellent, poor, hopeless, and questionable
prognosis, respectively. Though majority of the subjects had good prognosis (114 subjects; 38%), there was a substantial variability in the
distribution of the measured parameters as per the risk scores within this cohort. A strong positive correlation was seen between prognosis
and probing depth (PD) ≥5 mm. There was a weak, but statistically significant correlation between predictive risk from MPRA and various types
of prognosis (rs = 0.507; p < 0.001).
Conclusion: The measures used to assess risk and prognosis are almost similar, but the weak correlation between risk and prognosis seems to
suggest that an increased risk of developing periodontal disease need not necessarily indicate a bad prognosis.
Keywords: Chronic periodontitis, Periodontitis, Prognosis, Risk.
Journal of Dental Sciences and Oral Rehabilitation (2019): 10.5005/jp-journals-10086-1219