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Reproducibility of a clinical screening method for assessing gingival inflammation pockets and plaque retentions



Reproducibility of a clinical screening method for assessing gingival inflammation pockets and plaque retentions



Community Dentistry & Oral Epidemiology 13(1): 33-36



The reproducibility of the Periodontal Treatment Need System (PTNS) was evaluated, when plaque retentions were examined separately. A sample of 8000 persons was drawn to represent the Finnish population aged 30 yr and over. The 1st clinical examination (total sample) was made by a specially trained expanded-duty dental auxiliary (EDDA). During the 2nd examination (2-6 mo. later), 20% of the total sample was reexamined by a dentist, and of those, every 6th patient was examined by the EDDA. Reproducibility of the PTNS was assessed as intra- and interexaminer agreement and was calculated using Cohen's kappa and weighted kappa. The intraexaminer weighted kappa values were 0.67 .+-. 0.05 for the PTNS and 0.48 .+-. 0.15 for plaque retentions. The interexaminer weighted kappa values between the PTNS registrations were 0.77 .+-. 0.05 and 0.74 .+-. 0.12 in plaque retentions when examinations were made within 1 day, and 0.53 .+-. 0.05 and 0.37 .+-. 0.07, respectively, when the interexaminer registrations were made with an interval of 2-6 mo. between them. The kappa values for intra- and interexaminer reliability reflect quite high reproducibility.

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Accession: 006315125

Download citation: RISBibTeXText

PMID: 3855732

DOI: 10.1111/j.1600-0528.1985.tb00416.x


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