Table 5: Effect of various factors on the prevalence of severe early childhood caries at 20 ± 2.5 months of age in univariable and multivariable logistic regression analyses*.

Variable Univariable analysis Multivariable analysis* OR 95% CI** OR 95% CI** Child’s gender          Male reference reference  Female 0.45 0.19–1.11 0.48 0.19–1.18 Age at dental exam (months) 1.18 1.03–1.36 † 1.20 1.02–1.37 † Family structure          One parent reference reference  Two parents 0.37 0.16–0.88 † 0.37 0.14–0.93 † Mother’s age at childbirth in years          Under 25 reference reference  25 to 29 0.84 0.32–2.24 0.84 0.27–2.65  30 to 45 0.59 0.19–1.84 0.55 0.17–1.75 Mother’s highest level of education          Primary reference reference  Secondary 0.66 0.22–2.04 0.47 0.12–1.81  Tertiary 0.89 0.33–2.48 0.87 0.29–2.57 Mother’s’ employment          Employed reference reference  Unemployed 1.09 0.47–2.48 0.97 0.41–2.30

*Variables entered in the multivariable analyses were age at examination in months, age at first tooth eruption in months, child’s gender, mother’s age, level of education and employment status. **OR: odds ratio; 95% CI: 95% confidence interval. †P < 0.01.