Table 3 . Association between OH and two major SES factors; educational level and economic situation .
| Variable | Brush ≥ twice/day | Floss ≥ once/day | Both habits/day | |||||||||
| % | Crude OR a | Adjusted OR b | P for Trend c | % | Crude OR a | Adjusted OR b | P for Trend c | % | Crude OR a | Adjusted OR b | P for Trend c | |
| Males | ||||||||||||
| Education level | ||||||||||||
| Illiterate | 13.4 | 1.0 | 1.0 | 0.000 | 5.2 | 1.0 | 1.0 | 0.000 | 3.0 | 1.0 | 1.0 | 0.000 |
| Primary school | 9.6 | 1.4 | 1.3 | 6.8 | 1.5 | 1.4 | 1.0 | 1.0 | 1.0 | |||
| Guidance school | 10.6 | 1.8* | 1.7* | 10.2 | 2.5** | 2.3** | 2.5 | 2.3 | 2.3 | |||
| High school | 18.6 | 3.3** | 3.1** | 17.9 | 4.3** | 3.8** | 5.6 | 3.9** | 3.6* | |||
| Associate degree | 22.6 | 4.8** | 4.4** | 24.9 | 8.1** | 7.1** | 8.8 | 8.8** | 8.1** | |||
| Graduate | 20.3 | 4.5** | 4.1** | 35.3 | 10.0** | 8.5** | 9.7 | 11.2** | 10.2** | |||
| Post graduate | 26.1 | 5.1** | 4.6** | 33.0 | 16.5** | 14.2** | 10.0 | 15.2** | 13.6* | |||
| Economic status | ||||||||||||
| 1st quartile | 11.5 | 1.0 | 1.0 | 0.000 | 6.9 | 1.0 | 1.0 | 0.000 | 1.4 | 1.0 | 1.0 | 0.000 |
| 2nd quartile | 12.0 | 1.0 | 0.9 | 8.8 | 1.3 | 1.2 | 2.1 | 1.3 | 1.2 | |||
| 3th quartile | 11.9 | 1.1 | 0.9 | 11.7 | 1.7** | 1.6* | 2.6 | 1.7 | 1.5 | |||
| 4th quartile | 17.6 | 1.6* | 1.4 | 23.6 | 3.9** | 3.4** | 7.1 | 4.9** | 4.0** | |||
| Females | ||||||||||||
| Educational level | ||||||||||||
| Illiterate | 16.6 | 1.0 | 1.0 | 0.000 | 7.2 | 1.0 | 1.0 | 0.000 | 2.9 | 1.0 | 1.0 | 0.000 |
| Primary school | 22.2 | 1.6** | 1.5** | 12.0 | 1.8** | 2.1** | 3.4 | 1.3 | 1.5 | |||
| Guidance school | 27.9 | 2.3** | 2.2** | 19.5 | 3.1** | 3.6** | 6.9 | 3.1** | 3.4** | |||
| High school | 29.3 | 3.2** | 2.9** | 26.8 | 5.7** | 6.1** | 10.8 | 6.2** | 6.3** | |||
| Associate degree | 31.3 | 3.6** | 3.2** | 35.1 | 8.0** | 8.5** | 15.5 | 9.2** | 9.1** | |||
| Graduate | 37.1 | 4.2** | 3.7** | 39.6 | 11.1** | 11.5** | 20.2 | 11.6** | 11.2** | |||
| Post graduate | 47.6 | 7.1** | 6.4** | 39.5 | 19.0** | 20.4** | 20.0 | 19.0** | 19.2** | |||
| Economic status | ||||||||||||
| 1st quartile | 23.3 | 1.0 | 1.0 | 0.000 | 10.5 | 1.0 | 1.0 | 0.000 | 3.3 | 1.0 | 1.0 | 0.000 |
| 2nd quartile | 22.8 | 1.0 | 0.9 | 16.6 | 1.7** | 1.5** | 5.3 | 1.7* | 1.5 | |||
| 3th quartile | 27.0 | 1.2 | 1.1 | 20.5 | 2.2** | 1.8** | 8.0 | 2.6** | 2.1* | |||
| 4th quartile | 31.8 | 1.6** | 1.4* | 30.2 | 3.8** | 2.9** | 13.1 | 4.8** | 3.6** | |||
OH= Oral Hygiene; SES= Socio-Economic Status; OR= Odds Ratio
adefined as OR’s estimation without any adjustment’ bdefined as OR’s estimation by adjusting over gender, residential areas and age groups’; cdefined as P-value of Cochran-Armitage test for trend analysis.
*P< 0.050; **P< 0.001.