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Table 4 Condition transition for untreated caries over the two-year follow-up in Gangneung adolescent at 2013 (N = 1073)

From: Inequalities in oral health among adolescents in Gangneung, South Korea

  Caries status change (from 2011 to 2013)  
No → Noa Yes → Nob No → Yesc Yes → Yesd
Total 834 (77.7) 86 (8.1) 61 (5.7) 92 (8.6)  
Gender
 Girls 397 (78.3) 48 (9.5) 25 (4.9) 37 (7.3)  
 Boys 437 (77.2) 38 (6.7) 36 (6.4) 55 (9.7)  
School type ***
 General 585 (82.5) 54 (7.6) 37 (5.2) 33 (4.7)  
 Vocational 249 (68.4) 32 (8.8) 24 (6.6) 59 (16.2)  
Father’s education ***
 College or above 361 (84.5) 33 (7.7) 23 (5.4) 10 (2.3)  
 High school or below 432 (74.9) 47 (8.2) 34 (5.9) 64 (11.1)  
Mother’s education
 College or above 244 (81.1) 26 (8.6) 18 (6.0) 13 (4.3)  
 High school or below 545 (77.8) 55 (7.9) 38 (5.4) 63 (9.0)  
Perceived economic status **
 High 621 (78.8) 68 (8.6) 47 (6.0) 52 (6.6)  
 Low 209 (74.4) 18 (6.4) 14 (5.0) 40 (14.2)  
FAS ***
 High 732 (79.2) 77 (8.3) 52 (5.6) 63 (6.8)  
 Low 100 (68.5) 8 (5.5) 9 (6.6) 29 (19.9)  
Frequency of tooth-brushing
 ≥2 764 (77.9) 80 (8.2) 53 (5.4) 84 (8.6)  
 < 2 70 (76.1) 6 (6.5) 8 (8.7) 8 (8.7)  
Frequency of eating snacks
 < 1 699 (79.1) 67 (7.6) 47 (5.3) 71 (8.0)  
 ≥1 131 (70.8) 19 (10.3) 14 (7.6) 21 (11.4)  
Frequency of drinking soda **
 < 1 777 (79.0) 72 (7.3) 53 (5.4) 81 (8.2)  
 ≥1 57 (63.3) 14 (15.6) 8 (8.9) 11 (12.2)  
Smoking experience ***
 No 611 (80.8) 54 (7.1) 42 (5.6) 49 (6.5)  
 Yes 223 (70.4) 32 (10.1) 19 (6.0) 43 (13.6)  
Annual visits to dental clinic **
 Yes 410 (79.5) 51 (9.9) 18 (3.5) 37 (7.2)  
 No 424 (76.1) 35 (6.3) 43 (7.7) 55 (9.9)  
  1. aNo → No as remaining caries-free, bYes → No as being treated with fillings, cNo → Yes as developing dental caries, and dYes → Yes as remaining untreated caries
  2. **p < 0.01, ***p < 0.001