Figure 1.

Proportions of 12-year-old Thai children categorised by risk for moderate to very severe oral health-related impacts on quality of life according to the presence of untreated decayed and missing teeth and periodontal disease (n = 1,063). *Fewer than three sextants with calculus with gingivitis. †Three or more sextants with calculus with gingivitis. No risk: no untreated decay; no missing teeth; periodontal disease in fewer than three sextants. Low risk: untreated decay in one tooth; periodontal disease in three or more sextants, but calculus with gingivitis in fewer than three sextants. High risk: untreated decay in two or more teeth; loss of one or more teeth; periodontal disease in three or more sextants with calculus with gingivitis.