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Table 4 Summary of responses to "Dietary habits" and their relationship with plaque score

From: Assessment of oral self-care in patients with periodontitis: a pilot study in a dental school clinic in Japan

Dietary habits Items Responses and Binarization† Relationship with plaque score
1. Frequency of meals (per day) n = 65   NS
   none 0 (0)  
   1x 0 (0)  
   2x 9 (14)  
   3x 56 (86)  
   4x or more 0 (0)  
2. Self-evaluation of diet n = 61   NS
   Good 30 (49)  
   Fair 23 (38)  
   Bad 8 (13)  
3. Frequency of between-meal snacks (sweets) n = 55   NS
   none 14 (25)  
   1x 27 (49)  
   2x 13 (24)  
   3x 1 (2)  
   4x or more 0 (0)  
  1. Values are expressed in n (%). Items subjected to the statistical analysis were shown.
  2. †Responses were grouped into two (as separated by dotted line) and compared with two categories of PCR (≥ 40% vs. < 40%) by Fisher's exact test. P-values less than 0.05 were considered statistically significant.
  3. NS; not significant