Table 2: Parents’ sociodemographic characteristics and their children’s oral health-related quality of life (Gr-ECOHIS) estimates, among the 176 study parent-child dyads.
|  |  |  | ECOHIS | 
|  | n or mean | % or SD | mean (SD) | P* | 
| Entire sample | 176 | 100 | 3.4 (5.2) |  | 
| Education (categorical) |  |  |  | 0.2 | 
| high school or less | 31 | 18 | 3.8 (6.5) |  | 
| technical college | 60 | 34 | 3.6 (5.5) |  | 
| university | 51 | 29 | 4.0 (5.2) |  | 
| graduate | 34 | 19 | 1.6 (2.7) |  | 
| years (mean, SD) | 15 | 2.6 |  | 0.05 | 
| Age (years; quartiles) |  |  |  | 0.56 | 
| Q1 range: 27.6, 35.0 | 44 | 2.8 | 3.4 (5.5) |  | 
| Q2 range: 35.1, 37.5 | 44 | 0.8 | 4.0 (5.8) |  | 
| Q3 range: 37.5, 39.9 | 44 | 1.3 | 3.7 (5.7) |  | 
| Q4 range: 39.9, 56.5 | 44 | 6.5 | 2.5 (3.4) |  | 
| years (mean, SD) | 38 | 4.2 |  | 0.50 | 
| Marital |  |  |  | 0.60 | 
| single | 2 | 1 | 6.0 (8.5) |  | 
| married | 168 | 95 | 3.3 (5.1) |  | 
| divorced, separated, widowed | 6 | 3 | 4.8 (7.4) |  | 
| Number of children |  |  |  | =0.0008† | 
| 1 | 54 | 31 | 1.8 (3.3) |  | 
| 2 | 102 | 58 | 3.6 (5.4) |  | 
| 3 or more | 20 | 11 | 6.7 (6.4) |  | 
| Foreign-born |  |  |  | 0.98 | 
| no | 167 | 95 | 3.4 (5.2) |  | 
| yes | 9 | 5 | 3.3 (4.5) |  | 
        SD, standard deviation
*derived from analyses of variance (ANOVA) or linear regression
†statistically significant after Bonferroni correction for study-wide multiple testing (31 independent tests).