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Table 4 Regression results examining overall (fixed) effects of Lagged Activity on Anthropometry

From: Infant temperament contributes to early infant growth: A prospective cohort of African American infants

OUTCOME = Weight-for-length Z-scores

Variable

β (95% CI)b

Lagged Activitya

-0.16 (-0.29, -0.02)*

Total calories per day

-0.01 (-0.01, 0.01)

Breastfed (yes/no)

-0.27 (-0.70, 0.17)

Breastfed status by total calories interaction term

0.01 (-0.01, 0.01)

9 month visit

-0.07 (-0.85, 0.71)

12 month visit

-1.36 (-2.24, -0.48)*

18 month visit

-0.71 (-1.77, 0.34)

Lagged Activity by 9 month visit interaction term

0.02 (-0.15, 0.19)

Lagged Activity by 12 month visit interaction term

0.29 (0.10, 0.48)*

Lagged Activity by 18 month visit interaction term

0.14 (-0.07, 0.35)

Intercept

1.32 (0.71, 1.94)*

OUTCOME = Sum of Skinfold Measures

Variable

β (95% CI)b

Lagged Activity

-0.61 (-1.19, -0.03)*

Total calories per day

-0.01 (-0.01, 0.01)

Breastfed (yes/no)

2.13 (-0.53, 4.79)

Breastfed status by total calories interaction term

-0.01 (-0.01, 0.01)

9 month visit

-0.51 (-1.35, 0.33)

12 month visit

-1.21 (-2.21, -0.21)*

18 month visit

-1.57 (-2.92, -0.22)*

Intercept

28.21 (25.57, 30.86)*

  1. a Lagged Activity level subscale from the Infant Behavior Questionnaire-Revised
  2. b Beta coefficient and 95% Confidence Interval
  3. * P < 0.05