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Table 2 Mean dmft scores of the surveyed children according to their dietary and oral hygiene and dental visit behaviours

From: Oral health status and behaviours of preschool children in Hong Kong

  Group N (%) dmft ± S.D. Sig. Bonferroni Comparison
Dietary habits      
Bottle feeding Yes 143 (20%) 2.3 ± 3.4 p > 0.05  
No 557 (80%) 2.2 ± 3.5   
Bottle feeding duration (months) ≤ 24 202 (29%) 2.5 ± 4.0 p > 0.05  
  > 24 495 (71%) 2.1 ± 3.3   
Snacking frequency (times per day) ≤ 2 386 (55%) 2.0 ± 3.3 p = 0.05  
  > 2 314 (45%) 2.5 ± 3.7   
Oral hygiene habits      
Age toothbrushing started (months) 1 – 12 a 84 (12%) 1.1 ± 2.2 p = 0.01 a < c, d
  13 – 18 b 172 (25%) 2.1 ± 3.5   
  19 – 24 c 160 (23%) 2.5 ± 3.7   
  > 24 d 284 (41%) 2.5 ± 3.7   
Brushing frequency (times/day) < 2 175 (25%) 2.6 ± 3.7 p > 0.05  
  ≥ 2 525 (75%) 2.1 ± 3.5   
Parental assistance in toothbrushing Yes 559 (80%) 2.2 ± 3.5 p > 0.05  
  No 141 (20%) 2.5 ± 3.6   
Use other cleansing aids (N = 700) Yes 156 (22%) 2.5 ± 3.7 p > 0.05  
  No 544 (78%) 2.1 ± 3.4   
Dental service use      
Visited a dentist Yes 88 (13%) 3.1 ± 3.7 p < 0.01  
No 583 (83%) 2.0 ± 3.5