| variable | Prevalence (%) | Odds Ratio | (95% CI) | P value |
---|---|---|---|---|---|
18-month group | Mother's age (< 30 years) | 36.7 | 1.11 | (0.93, 1.32) | 0.26 |
 | Mother working | 25.1 | 1.66 | (1.37, 2.01) | <0.0001 |
 | Not first born child | 45.5 | 1.93 | (1.62, 2.30) | <0.0001 |
 | Interaction with other children | 21.2 | 1.76 | (1.44, 2.15) | <0.0001 |
 | Presence of allergy | 17.8 | 0.90 | (0.71, 1.13) | 0.37 |
 | Concern about adverse events | 30.0 | 1.30 | (1.07, 1.56) | 0.007 |
 | Low knowledge | 60.7 | 2.09 | (1.73, 2.53) | <0.0001 |
36-month group | Mother's age (< 30 years) | 22.5 | 1.32 | (0.95, 1.81) | 0.09 |
 | Mother working | 33.3 | 2.60 | (1.95, 3.49) | <0.0001 |
 | Not first born child | 46.5 | 2.04 | (1.53, 2.74) | <0.0001 |
 | Interaction with other children | 38.3 | 2.64 | (1.98, 3.54) | <0.0001 |
 | Presence of allergy | 27.9 | 1.31 | (0.96,1.76) | 0.09 |
 | Concern about adverse events | 30.5 | 1.52 | (1.12, 2.05) | 0.01 |
 | Low knowledge | 51.1 | 1.91 | (1.43,2.58) | <0.0001 |