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Table 1 Study Sample Characteristics: N (%)

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

Adolescents aged 12–18

2007–09

2013–15

P-value

2007–09

2013–15

P-value

Total

2240 (100)

1449 (100)

 

2113 (100)

1466 (100)

 

Gender

 Male

1167 (52.1)

758 (51.9)

0.937

1113 (53.7)

812 (52.1)

0.572

 Female

1073 (47.9)

691 (48.1)

 

1000 (46.3)

718 (47.9)

 

Income level

 I (lowest)

553 (24.9)

347 (23.7)

0.671

524 (24.8)

348 (25.0)

0.872

 II

544 (23.9)

359 (26.7)

 

518 (24.8)

363 (25.1)

 

 III

568 (25.3)

368 (25.2)

 

522 (24.8)

391 (25.7)

 

 IV (highest)

575 (25.9)

375 (24.4)

 

549 (25.6)

364 (24.2)

 

FTB

  < 2

308 (13.8)

117 (7.9)

< 0.001

261 (12.3)

108 (7.7)

< 0.001

  ≥ 2

1932 (86.2)

1332 (92.1)

 

1852 (87.7)

1358 (92.3)

 

RDC

 No

755 (32.2)

427 (28.4)

0.116

1124 (53.4)

820 (57.3)

0.025

 Yes

1485 (67.8)

1022 (71.6)

 

989 (46.6)

646 (42.7)

 
  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)