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Table 2 Correlations of questionnaire items with PD assessments

From: A patient-reported questionnaire developed in a German early arthritis cohort to assess periodontitis in patients with rheumatoid arthritis

Patient questionnaire item Number of missing values Spearman’s corr. with dentist’s assessment Spearman’s corr. with assessment of radiographs
Number of teeth 22 − 0.49 − 0.40
Receding jaw bone 25 0.41 0.43
Receding gums 14 0.37 0.33
Presence of gum pockets 16 0.36 0.31
Loose teeth 9 0.36 0.36
Tooth extractions because of inflammation and deep gum pockets 13 0.27 0.22
More dentist visits because of inflammation than because of caries 12 0.26 0.17
More tooth/gum problems than other persons of the same age and sex 22 0.19 0.10
Inflammation of the gums/bleeding 8 0.12 0.08
Magnitude of suffering from dental problems 6 0.11 0.07
Cold- or heat sensitivity 6 0.09 0.08
Use of antibiotics 6 0.08 0.13
  1. Correlations of questionnaire items with dentists’ assessment of PD and with an independent assessment of PD via radiographs. Items in italics were found to be the most suitable to detect PD via factor analysis and are included in the final score