Table 3 Intent-to-treat analysis of the main and interaction effects of the mFICare intervention on maternal mental health

1. Main effects only

 Coefficients (95% CI) [p-value]

  a) mFICare (ref = FCC)

0.15 (-0.15, 0.45) [0.33]

0.10 (-0.16, 0.35) [0.45]

  b) Stress (PSS:NICU score) at study enrollment (log)

1.05 (0.55, 1.54) [< 0.001]

0.50 (0.10, 0.90) [0.015]

 Adjusted R²

0.221

0.063

 Model F-statistic {df} [p-value]

8.41 {6,151} [< 0.001]

3.31 {5,166} [0.007]

2. Interaction effect

 Coefficients (95% CI) [p-value]

  a) mFICare (ref = FCC)

1.07 (0.39, 2.72) [0.007]

0.69 (0.04, 1.33) [0.037]

  b) Stress (PSS:NICU score) at study enrollment (log)

1.55 (0.32, 4.91) [< 0.001]

0.85 (0.32, 1.39) [0.002]

  c) Interaction of a) and b)

-1.18 (-2.10, -0.26) [0.012]

-0.76 (-1.53, 0.006) [0.052]

 Adjusted R²

0.248

0.079

 Model F-statistic {df} [p-value]

8.38 {7,150} [< 0.001]

3.45 {6,165} [0.003]