Table 1.

Demographic, clinical, behavioral, and other covariate information.

	Mean (SD)	Range
Infant demographics
Age, in months	3.3 (0.8)	2–5
	N (%)
Gender, number of females	22 (48)
Birth order, first child	32 (66)	1–5
Birth order, second child	13 (27)	1–5
Infant emotional behaviors
Positive emotional behavior	2.2 (0.7)	1–5
Negative emotional behavior	1.3 (0.5)	1–2.5
Infant covariate information
Number of usable frames	217.8 (58.9)	111–292
Scan length, in minutes	7.3 (2.0)	3.7–9.7
Maternal demographics
	N (%)
Social assistance tally∗, number of moderate/high users	35 (76)
Maternal caregiving behaviors
Positive caregiving (PCA component)	-0.06 (1.11)	-4.18–1
Negative caregiving (PCA component)	-0.20 (0.92)	-1.56–3.04
Maternal mental-state talk	2.9 (0.8)	1–4
Maternal clinical information
Edinburgh Postnatal Depression Scale (EPDS) score‡	6.1 (5.6)	0–24

^∗Social assistance tally was measured by counting the number of public assistance services used, these were further dichotomized into low (0–2 counts) or high (3–7 counts).

^‡An EPDS score >10 was reported by 20% of mothers, indicating ‘probable’ depression, while an EPDS score of >13 was reported in 12.5%.