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Table 4 Associations between selected socio-demographic variables and oral health-related quality of life

From: Ethnic and socio-economic disparities in oral health outcomes and quality of life among Sri Lankan preschoolers: a cross-sectional study

Variables

ECOHIS score (child)

ECOHIS score (family)

 

Unadjusted coefficient (SE)

IRR (95% CI)

Adjusted coefficient (SE)

IRR (95% CI)

Unadjusted coefficient (SE)

IRR (95% CI)

Adjusted coefficients (SE)

IRR (95% CI)

Age

0.02* (0.01)

1.02* (1.00,1.05)

0.02 (0.01)

1.02 (0.99,1.04)

0.00 (0.00)

1.00 (0.99,1.01)

0.00 (0.00)

1.00 (0.99,1.01)

Gender

        

Boys

0.06 (0.12)

1.06 (0.84,1.34)

0.12 (0.12)

1.13 (0.89,1.43)

0.00 (0.06)

1.00 (0.88,1.13)

0.03 (0.07)

1.03 (0.91,1.18)

Ethnicity

        

  Muslim

0.43* (0.21)

1.54* (1.02,2.32)

0.37 (0.22)

1.45 (0.95,2.23)

0.41*** (0.12)

1.51*** (1.18,1.92)

0.35** (0.13)

1.42** (1.10,1.84)

  Tamil

0.76*** (0.23)

2.15*** (1.36,3.40)

0.73** (0.28)

2.07** (1.19,3.60)

0.12 (0.18)

1.13 (0.79,1.61)

−0.14 (0.15)

0.87 (0.65,1.17)

Income

        

(SL Rupees)

−7.49 (6.05)

1.00 (0.99,1.00)

4.47 (6.16)

1.00 (0.99,1.00)

−1.10 (3.15)

1.00 (0.99,1.00)

4.82 (3.26)

1.00 (0.99,1.00)

Father’s education

        

  Grade 6-12

0.71** (0.25)

2.04** (1.25,3.34)

0.53 (0.29)

1.69 (0.96,2.98)

0.37*** (0.06)

1.45*** (1.29,1.63)

0.31** (0.11)

1.37** (1.11,1.69)

  Grade ≤ 5

0.77* (0.32)

2.15* (1.15,4.05)

0.92* (0.38)

2.52* (1.20,5.31)

0.35** (0.13)

1.42** (1.10,1.82)

0.46* (0.18)

1.59* (1.11,2.27)

Mother’s education

        

  Grade 6-12

0.38* (0.18)

1.46* (1.02,2.07)

0.13 (0.20)

1.14 (0.77,1.68)

0.21* (0.08)

1.23* (1.04,1.45)

0.15 (0.11)

1.16 (0.94,1.43)

  Grade ≤ 5

0.01 (0.44)

1.01 (0.43,2.38)

−1.16*** (0.36)

0.31*** (0.15,0.64)

0.13 (0.19)

1.14 (0.79,1.65)

−0.31 (0.16)

0.74 (0.53,1.02)

  1. *p < 0.05 **p < 0.01 ***p < 0.001.
  2. IRR = Incidence Rate Ratio SE = Standard Error 95% CI = 95% Confidence Interval.
  3. Reference categories: Gender- girls, Ethnicity- Sinhalese, Father’s and Mother’s education- > grade 12.