TABLE 4.
Within Intervention Group Dose Effects on Mean WFAz and WFA Percentile Categories
| Within Intervention Group Dose Effects | |||||
|---|---|---|---|---|---|
| Low Attendance (0–4 Sessions) | Medium Attendance (5–9 sessions) | High Attendance (10–12 sessions) | P | Adjusted Pa | |
| Age 2 y | |||||
| Sample No. | 58 | 84 | 61 | — | — |
| Continuous, mean (SD) | |||||
| WFAz | 0.92 (1.17) | 0.59 (1.13) | 0.37 (0.97) | .02 | <.01 |
| Categorical, n (%) | |||||
| WFA ≥85th percentile | 26 (44.8) | 28 (33.3) | 14 (23.0) | .04 | <.01 |
| WFA ≥95th percentile | 15 (25.9) | 19 (22.6) | 6 (9.8) | .06 | .01 |
| Age 3 y | |||||
| Sample No. | 53 | 71 | 72 | — | — |
| Continuous, mean (SD) | |||||
| WFAz | 0.90 (1.27) | 0.74 (1.32) | 0.41 (1.06) | .07 | .03 |
| Categorical, n (%) | |||||
| WFA ≥85th percentile | 21 (39.6) | 28 (39.4) | 21 (29.2) | .35 | .66 |
| WFA ≥95th percentile | 14 (26.4) | 16 (22.5) | 6 (8.0) | .02 | .02 |
—, not applicable.
a
Adjusted P value obtained using multiple linear and logistic regression controlling for maternal education (did not complete high school versus completed high school), country of origin (not born in the United States versus born in the United States), parity (first child versus not first child), and prepregnancy obesity (BMI <30 vs BMI ≥30).