Reading | Singing | Talking | Watching TV | |||||
---|---|---|---|---|---|---|---|---|
Predictors | RR (95% CI) | P value | RR (95% CI) | P value | RR (95% CI) | P value | RR (95% CI) | P value |
Group | ||||||||
Intervention | 1.4 (1.2-1.6) | <0.0001 | 1.09 (0.94-1.25) | 0.24 | 0.99 (0.89-1.1) | 0.94 | 0.8 (0.6-1.0) | 0.054 |
Control | 1.0 | 1.0 | 1.0 | |||||
Age of primary parent | ||||||||
Continuous variable | 0.98 (0.97-0.98) | 0.02 | 1.0 (0.99-1.02) | 0.67 | 0.99 (0.98-0.99) | 0.03 | 0.99 (0.97-1.02) | 0.51 |
Income Level | ||||||||
Low (<60 K) | 1.0 | 1.0 | 1.0 | 1.0 | ||||
Medium (60–99) | 1.1 (0.9-1.3) | 0.27 | 1.05 (0.9-1.2) | 0.5 | 0.99 (0.9-1.1) | 0.83 | 0.8 (0.6-1.1) | 0.11 |
High (100 & up) | 1.1 (0.9-1.3) | 0.33 | 1.04 (0.9-1.2) | 0.67 | 0.9 (0.8-1.05) | 0.22 | 0.8 (0.6-1.1) | 0.23 |
Education Level | ||||||||
Less than/HS | 1.0 | 1.0 | 1.0 | 1.0 | ||||
College/Univ/Grad | 1.3 (1.1-1.6) | 0.01 | 0.96 (0.8-1.1) | 0.65 | 1.02 (0.9-1.1) | 0.82 | 0.8 (0.6-1.2) | 0.36 |
Number of adults in home | ||||||||
One | 1.0 | 1.0 | 1.0 | 1.0 | ||||
Two or more | 0.8 (0.6-1.2) | 0.39 | 0.9 (0.6-1.4) | 0.71 | 0.95 (0.7-1.3) | 0.73 | 0.8 (0.4-1.8) | 0.67 |
Baby’s age in months | ||||||||
Continuous variable | 1.05 (1.02-1.07) | 0.0001 | 1.0 (0.98-1.03) | 0.68 | 1.05 (1.03-1.07) | <0.0001 | 1.1 s(1.04-1.1) | 0.006 |