TABLE 7

Subgroup Analyses of 5 Primary Study Outcomes Using Known and Multiply Imputed Data

SubgroupPercent of Subjects in Each SubgroupOutcome Scale
Crying KnowledgeShaking KnowledgeCrying GenerallyUnsoothable CryingSelf-talk
Education, P.48.81.19.97.99
    High school or less144.6 (1.4 to 7.7)0.6 (−1.5 to 2.7)−1.9 (−4.9 to 1.1)0.9 (−4.1 to 5.9)1.7 (−6.9 to 10.2)
    Some college225.9 (3.7 to 8.1)1.4 (−0.1 to 2.8)−0.4 (−2.9 to 2.1)1.6 (−2.6 to 5.8)0.9 (−4.8 to 6.6)
    College or more646.5 (5.2 to 7.7)1.3 (0.4 to 2.2)0.9 (−0.4 to 2.2)1.2 (−1.0 to 3.4)1.3 (−1.9 to 4.4)
Recruitment site, P.27.85.84.46.05
    Nursery415.3 (3.4 to 7.1)1.5 (0.3 to 2.8)−0.2 (−2.0 to 1.7)1.1 (−2.2 to 4.4)−2.3 (−7.0 to 2.4)
    Prenatal clinic406.5 (5.0 to 8.1)1.1 (0.0 to 2.2)0.4 (−1.2 to 2.1)0.4 (−2.3 to 3.2)2.4 (−1.6 to 6.5)
    Other clinic187.5 (5.3 to 9.8)1.1 (−0.5 to 2.6)0.6 (−1.7 to 2.9)3.5 (−0.6 to 7.6)6.9 (1.0 to 12.9)
Intervention read or viewed, P.008.03.84.22.34
    Neither80.4 (−2.9 to 3.8)−1.9 (−4.3 to 0.6)0.4 (−3.2 to 4.0)0.3 (−6.2 to 6.8)−5.4 (−14.6 to 3.8)
    Watched video45.8 (1.2 to 10.4)1.0 (−2.3 to 4.4)−1.0 (−5.9 to 4.0)9.8 (1.3 to 18.4)−1.8 (−14.3 to 10.8)
    Read pamphlet295.4 (3.6 to 7.2)0.6 (−0.7 to 1.8)−0.5 (−2.3 to 1.3)0.0 (−3.2 to 3.2)0.0 (−4.7 to 4.7)
    Both596.8 (5.2 to 8.3)1.8 (0.8 to 2.9)0.4 (−1.1 to 1.9)1.3 (−1.4 to 3.9)3.0 (−0.8 to 6.8)
First baby, P.89.77.46.36.92
    No346.1 (4.3 to 7.9)1.1 (−0.1 to 2.4)−0.2 (−2.1 to 1.6)2.5 (−0.7 to 5.8)1.4 (−3.1 to 5.9)
    Yes666.2 (4.9 to 7.6)1.4 (0.4 to 2.3)0.5 (−0.8 to 1.8)0.8 (−1.5 to 3.0)1.7 (−1.8 to 5.2)
Infant had unsoothable crying, P.79.62.35.26.28
    No566.0 (4.5 to 7.6)1.1 (0.1 to 2.1)−0.2 (−1.7 to 1.2)0.3 (−2.2 to 2.9)−0.0 (−3.8 to 3.8)
    Yes446.3 (4.8 to 7.9)1.5 (0.4 to 2.6)0.8 (−0.8 to 2.4)2.5 (−0.3 to 5.3)3.0 (−1.1 to 7.1)
  • Percents show the proportion of subjects in each subgroup. Each cell shows differences in mean scores PURPLE intervention mean minus control mean) with 95% CIs in parentheses. P values are for a test that the difference estimates are similar across subgroups.