Table 2.
Descriptive Statistics for Main Variables of Interest and Covariates
| 4 months N = 180 |
6 months N = 141 |
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|---|---|---|---|---|---|---|---|---|---|---|
| Variable | Mean | (SD) | Range | t(df)2 | p-value | Mean | (SD) | Range | t(df)2 | p-value |
| ICQ fussy/difficult1 | 24.11 | 6.64 | 9–42 | 24.39 | 6.72 | 9–48 | ||||
| EPDS severity | 3.43 | 4.22 | 0–23 | 3.29 | 4.12 | 0–22 | ||||
| Maternal Warmth | 3.34 | (0.68) | 1.5–4 | 3.28 | (0.70) | 2–4 | ||||
| Maternal Involvement | 3.71 | (0.46) | 2–4 | 3.33 | (0.60) | 1–4 | ||||
| Maternal Responsiveness | 3.51 | (0.48) | 2–4 | 3.35 | (0.61) | 2–4 | ||||
| Maternal Mental State Talk | 2.69 | (0.87) | 1–4 | 2.11 | (0.74) | 1–4 | ||||
| Maternal Negative Parenting Behaviors | 1.40 | (0.41) | 1–3.25 | 1.48 | (0.42) | 1–3 | ||||
| Infant Change in Neg Affect from Interaction to SF | 0.85 | (1.02) | −1.5–3 | −11.23 (179) | <.001 | 0.71 | (0.90) | −1–3 | −9.31 (140) | <.001 |
| Infant Change in Pos Affect from Interaction to SF | −0.67 | (0.80) | −2.5–2 | 11.23 (179) | <.001 | −0.76 | (1.03) | −3–2 | 8.78 (140) | <.001 |
| Infant Change in Gaze from Interaction to SF | 0.09 | (1.02) | −2.5–3.5 | −1.14 (178) | 0.256 | −0.27 | (0.73) | −2–2 | 4.35 (140) | <.001 |
Notes.
1
ICQ collected at 10wks and 6 months.
2
Paired-samples t-test comparing infant affect/gaze in interaction period and still face period.
ICQ = Infant Communication Questionnaire; EPDS = Edinburgh Postnatal Depression Scale; Neg = Negative; Pos = Positive; SF = Still-Face.