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Table 3 Association between self-reported toothbrushing frequency and clinical indexes for oral hygiene

From: Reliability of self-reported toothbrushing frequency as an indicator for the assessment of oral hygiene in epidemiological research on caries in adolescents: a cross-sectional study

Variables Toothbrushing frequency pvalue*
≤ twice a day More than twice a day
n (%) n (%)
Visible Plaque Index      
 Present 277 (76.9) 83 (23.1) <0.001
 Absent 63 (27.5) 166 (72.5)
Simplified Oral Hygiene Index      
 Unsatisfactory 224 (79.7) 57 (20.3) <0.001
 Satisfactory 116 (37.7) 192 (63.3)
  1. *Chi-square test. Results significant at the 5% level marked in bold.