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TESTLET b
The director of the Vintage Retirement Center contacts the local dental hygienists' society to provide a seminar on oral health. The facility has a population of 100 well residents between the ages of 60 and 78 years who have a middle SES. Twenty percent of the residents are edentulous, and the remaining 80% have varying numbers of teeth present. The oral health assessment results revealed a mean PlI of 2.1, mean DMFT of 5.2, mean D of 0, RCI of 2.1, and untreated root caries of 1.5. Correlation analysis revealed a correlation coefficient of r 0.81 for the relationship between the RCI and PlI in this group. Seventy percent of the residents have a dental home and report having regular dental care. Less than 10% of them report mild signs and symptoms of xerostomia.
-What relationship does the correlation between the RCI and PlI demonstrate between root caries and plaque biofilm in this target population?

Question

Quizplus · Accepted Answer

Correlation coefficient is the statistic used to demonstrate the direction and strength of a relationship between two variables. The sign of the coefficient (negative or positive ; below or above 0 ) indicates the direction of the relationship. The value of the coefficient indicates the strength of the relationship: 0.9 to 1.0 is very strong, 0.70 to 0.89 is strong, 0.50 to 0.69 is moderate, 0.26 to 0.49 is weak, and 0.25 and below is little , if any , relationship. The value of r = + 0 .81 is strong (value between 0.70 and 0.89) and positive (positive sign; above 0).

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