Skip to main content

Table 2 Prevalence rates (95% CI) of untreated dental caries and sealant by income level

From: Did the extended coverage policy contribute to alleviating socioeconomic inequality in untreated dental caries of both children and adolescents in South Korea?

Variables Children aged 6–11 Difference Adolescents aged 12–18 Difference
2007–09 2013–15 2007–09 2013–15
Untreated dental caries
Total 8.7 (7.3–10.1) 5.7 (4.3–7.1) −3.0 32.7 (30.1–35.3) 23.7 (20.7–26.7) −9.0
Gender
 Male 8.9 (6.9–10.9) 5.3 (3.5–7.2) −3.5 31.6 (28.3–35.0) 24.7 (21.0–28.4) −6.9
 Female 8.5 (6.6–10.4) 6.1 (4.2–8.1) −2.4 34.0 (30.4–37.6) 22.6 (18.7–26.6) −11.4
P-value 0.795 0.536   0.315 0.386  
Income level
 I (lowest) 11.9 (8.8–14.9) 5.7 (3.2–8.2) −6.2 42.0 (36.5–47.4) 32.0 (25.9–38.1) −10.0
 II 10.5 (7.5–13.6) 7.1 (4.0–10.1) −3.5 33.3 (28.5–38.1) 20.6 (15.3–25.8) −12.7
 III 7.4 (4.9–9.8) 3.2 (1.4–5.0) −4.1 27.6 (22.8–32.3) 22.3 (17.2–27.4) −5.2
 IV (highest) 5.2 (3.2–7.1) 6.8 (3.6–10.0) 1.6 28.2 (23.8–32.7) 19.9 (14.1–25.6) −8.4
P-value 0.001 0.152   < 0.001 0.006  
FTB
  < 2 14.8 (10.4–19.3) 9.6 (3.6–15.5) −5.3 30.7 (23.9–37.4) 31.0 (21.2–40.7) 0.3
  ≥ 2 7.7 (6.2–9.2) 5.4 (4.0–6.8) −2.3 33.0 (30.4–35.7) 23.1 (20.0–26.2) −9.9
P-value 0.001 0.091   0.513 0.095  
RDC
 No 10.0 (7.6–12.3) 5.1 (2.8–7.3) −4.9 34.2 (30.8–37.6) 28.1 (24.0–32.2) −6.1
 Yes 8.1 (6.3–9.8) 6.0 (4.2–7.7) −2.1 31.0 (27.5–34.5) 17.8 (14.5–21.1) −13.2
P-value 0.192 0.553   0.166 <  0.001  
Sealants
Total 30.6 (28.0–33.3) 40.7 (37.5–44.0) 10.1 26.8 (24.2–29.3) 37.0 (33.8–40.2) 10.2
Gender
 Male 29.6 (26.3–32.9) 40.3 (36.2–44.4) 10.7 26.1 (23.1–29.2) 36.4 (32.5–40.3) 10.3
 Female 31.7 (28.2–35.2) 41.2 (36.9–45.6) 9.5 27.5 (23.9–31.1) 37.6 (33.3–41.9) 10.1
P-value 0.320 0.737   0.539 0.651  
Income level
 I (lowest) 24.5 (20.2–28.7) 40.1 (34.1–46.1) 15.6 16.9 (13.0–20.7) 27.8 (22.5–33.0) 10.9
 II 31.7 (26.9–36.4) 37.5 (31.6–43.4) 5.8 24.4 (19.7–29.0) 38.5 (32.3–44.6) 14.1
 III 30.9 (26.0–35.8) 42.7 (36.8–48.6) 11.8 29.6 (25.1–34.1) 37.3 (31.8–42.7) 7.7
 IV (highest) 35.3 (30.5–40.1) 42.9 (36.7–49.2) 7.6 35.9 (30.9–40.9) 44.6 (38.3–51.0) 8.7
P-value 0.008 0.522   <  0.001 0.001  
FTB
  < 2 24.6 (19.2–30.0) 35.1 (25.7–44.5) 10.5 20.4 (15.1–25.7) 35.6 (25.5–45.8) 15.2
  ≥ 2 31.6 (28.8–34.4) 41.2 (37.8–44.6) 9.7 27.7 (25.0–30.3) 37.1 (33.8–40.4) 9.4
P-value 0.024 0.240   0.020 0.789  
RDC
 No 24.8 (20.7–28.9) 36.1 (30.3–41.9) 11.3 21.9 (18.8–25.0) 33.4 (29.5–37.3) 11.6
 Yes 33.4 (30.3–36.5) 42.6 (38.9–46.3) 9.2 32.4 (28.7–36.1) 41.7 (37.2–46.2) 9.4
P-value 0.001 0.062   <  0.001 0.003  
  1. P-values were obtained from complex samples crosstabs: Rao-Scott chi-squared test
  2. Values are presented by weighted prevalence % (95% CI)
  3. FTB (frequency of tooth brushing) and RDC (regular dental check-ups)