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Table 1 Distribution of variables in the three groups: caries free, few lesions and high caries group

From: Factors underlying the polarization of early childhood caries within a high-risk population

Variables Caries free group N (%) Few lesions group N (%) High caries group N (%)
Family Income (minimum wages)    
  <1 55 (65) 19 (23) 10 (12)
  1 75 (68) 22 (20) 14 (13)
  > 1 30 (79) 5 (13) 3 (8)
Mother’s years of education    
  < 8 37 (59) 16 (25) 10 (16)
  8 a 11 64 (72) 15 (17) 10 (11)
  > 11 59 (73) 15 (18) 7 (91)
Who stayed at home with the child when s/he was not in day care    
  The mother 80 (68) 24 (20) 13 (11)
  Others 80 (69) 22 (19) 14 (12)
Whether the mother or caregiver had received information about oral health    
  No 68 (71) 18 (19) 9 (9)
  Yes 93 (67) 28 (20) 18 (137)
Mother’s history of caries    
  No 68 (69) 21 (22) 9 (9)
  Yes 92 (68) 25 (19) 18 (13)
Number of previous child hospitalizations    
  0 90 (67) 27 (20) 18 (13)
  1 55 (71) 15 (20) 7 (9)
  ≥2 times 16 (73) 4 (18) 2 (9)
Whether they had already visited the dentist    
  No 135 (67) 44 (22) 22 (11)
  Yes 26 (79) 2 (6) 5 (15)
Antibiotic use in the last year    
  No 107 (70) 26 (17) 19 (13)
  Yes 54 (66) 20 (24) 8 (10)
Nighttime breastfeeding after 1 year    
  No 125 (66) 45 (24) 20 (10)
  Yes 38 (78) 4 (8) 7 (14)
Use of a night bottle    
  No 117 (65) 40 (22) 23 (13)
  Yes 44 (82) 6 (11) 4 (7)
Frequency of sucrose consumption between main meals    
  ≤ 3 145 (72) 42 (21) 15 (7)
  >3 times 22 (55) 6 (15) 12 (30)
When teeth brushing started (months)    
  0 - 6 19 (86) 3 (14) 0 (0)
  7 a 12 69 (69) 16 (16) 15 (15)
  > 12 73 (65) 27 (24) 12 (11)
Who does the teeth brushing    
  The child alone 17 (49) 14 (40) 4 (11)
  The caregiver 144 (72) 32 (16) 23 (11)
The number of times a day their teeth are brushed    
  up to 1 15 (58) 7 (27) 4 (15)
  ≥2 146 (70) 39 (19) 23 (11)
Visible biofilm    
  <15% 58 (79) 11 (15) 4 (6)
  ≥ 15% 112 (64) 38 (22) 24 (14)
Streptococcus mutans contamination in the saliva    
  <105 CFU* 104 (69) 28 (19) 17 (11)
  ≥ 10 5 CFU* 63 (66) 21 (22) 11 (12)
Total** 167 (100) 49 (100) 28 (100)
  1. *CFU: colony-forming units **umbers may not add to total because of missing values.