Table 5.

Selected Results from Estimations of Maternal Postpartum Health Equations With 2-Stage Least Squares (n = 716)

2SLS Coefficients (P Value)
Independent VariablesPhysical Health*1Mental HealthSymptoms
2SLS = 2-stage least squares.
* Physical health was measured with the PCS (physical component summary of the SF-12) score.
† Mental health was measured with the MCS (mental component summary of the SF-12) score.
‡ Statistically significant t test on the estimated 2SLS regression coefficient.
Preconception overall health (scaled 1 to 4)2.35 (<.001)0.79 (.04)−0.69 (<.001)
Prenatal moods (1 = yes)0.10 (.86)−3.67 (<.001)1.19 (<.001)
Cesarean delivery (1 = yes)−5.96 (<.001)0.60 (.45)−0.19 (.59)
Infant sex (1 = female)−0.24 (.64)−2.27 (<.001)−.03 (.91)
Perceived control (scaled 1 to 4)0.83 (.03)0.84 (.06)−0.23 (.27)
Social support (scaled 5 to 25)0.06 (.42)0.49 (<.001)−0.03 (.42)
Breastfeeding (1 = yes)−1.32 (.67)−1.49 (.68)4.63 (.00)
Infant colic (1 = yes)0.69 (.39)−1.25 (.17)0.89 (.04)
Time elapsed since childbirth, d0.14 (.03).02 (.77)−.02 (.44)