Table 2.
Association of Baseline PSS Tertiles and Change in WFL z-score from Baseline.
| Variable | β Estimate | 95%CI | p Value |
|---|---|---|---|
| Timepoint | |||
| 6 months | Ref | ||
| 9 months | 0.20 | 0.08–0.31 | 0.001 |
| 12 months | 0.29 | 0.18–0.44 | <0.001 |
| PSS Tertiles | |||
| Q1 (Low) | Ref | ||
| Q2 | 0.06 | −0.13–0.26 | 0.531 |
| Q3 (High) | 0.07 | −0.151–0.29 | 0.527 |
| PSS × Time | |||
| Q2 × 9 months | −0.02 | −0.18–0.13 | 0.772 |
| Q2 × 12 months | −0.05 | −0.20–0.10 | 0.498 |
| Q3 × 9 months | 0.01 | −0.15–0.17 | 0.923 |
| Q3 × 12 months | −0.01 | −0.18–0.15 | 0.868 |
Values were calculated with multivariable adjusted, repeated subjects, mixed-effects model, adjusted for birth weight, and gestational age at birth.