pISSN 1225-388X
eISSN 2093-7784
Trends in prevalence rate (%) and prevalence ratio of toothbrushing less than twice a day by household income level in Korea
| Classification | Wave 4 (2007-2009) | Wave 5 (2010-2012) | Wave 6 (2013-2015) | Wave 7 (2016-2018) | Wave 8 (2019-2020) |
|---|---|---|---|---|---|
| Prevalence rate (standard error) | |||||
| Total | |||||
| Crude | 13.9 (0.3) | 13.6 (0.4) | 11.4 (0.3) | 10.1 (0.3) | 8.8 (0.3) |
| Age std. | 13.7 (0.3) | 13.3 (0.4) | 10.9 (0.3) | 9.5 (0.3) | 8.4 (0.3) |
| Income level: age std. | |||||
| I (lowest) | 18.7 (0.7) | 16.0 (0.8) | 16.1 (0.8) | 14.3 (0.7) | 11.6 (0.8) |
| II | 14.7 (0.6) | 15.7 (0.7) | 11.7 (0.6) | 10.6 (0.6) | 9.0 (0.7) |
| III (middle) | 13.2 (0.6) | 12.1 (0.6) | 9.9 (0.6) | 9.8 (0.5) | 8.2 (0.7) |
| IV | 12.2 (0.6) | 10.9 (0.7) | 8.3 (0.5) | 7.0 (0.5) | 6.5 (0.6) |
| V (highest) | 9.2 (0.5) | 10.7 (0.6) | 8.5 (0.5) | 5.7 (0.4) | 6.6 (0.6) |
| Prevalence difference of I vs V | 9.5 | 5.3 | 7.6 | 8.6 | 5.0 |
| Prevalence ratio | |||||
| Income level | |||||
| I (lowest) | 2.04 |
1.52 |
1.97 |
2.57 |
1.87 |
| II | 1.61 |
1.49 |
1.46 |
1.91 |
1.43 |
| III (middle) | 1.45 |
1.17 |
1.22 |
1.67 |
1.31 |
| IV | 1.31 |
1.03NS | 1.04NS | 1.26 |
0.97NS |
| V (highest) | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
NS