Table 1 Summary of infant-caregiver dyads characteristics for analyses.

From: Early infant prefrontal gray matter volume is associated with concurrent and future infant emotionality

 

Primary sample

Replication sample

 

3-month

9-month

3-month

9-month

Mean ± SD

Mean ± SD

Mean ± SD

Mean ± SD

Total infant-caregiver pairs

77

44

40

40

Usable 3-month scans, T1(T1 used in mix-modality)/T2 ^

62(20)/57

35(11)/33

26(11)/29

26(11)/29

Infant

Age, wks

15.17 ± 2.99

45.32 ± 9.20

14.00 ± 2.63

38.95 ± 3.36

Biological sex, male/female

38/39

21/23

21/19

21/19

Caregiver

Caregiver age

31.47 ± 4.99

--

22.25 ± 1.28

--

Total government assistance sum

1.21 ± 1.45

--

3.58 ± 1.22

--

EPDS depressed mood

6.08 ± 5.26

6.45 ± 4.79

6.28 ± 5.54

5.55 ± 4.82

PAI-BOR affective instability

4.83 ± 3.54

5.11 ± 3.92

6.45 ± 2.77

--

STAI state anxiety

30.70 ± 10.23

29.48 ± 9.19

31.38 ± 9.68

28.63 ± 6.75

STAI trait anxiety

35.92 ± 11.48

35.00 ± 10.06

34.95 ± 8.37

33.60 ± 7.01

Emotional outcomes

IBQ NE

2.97 ± 0.60 (n = 75)

3.26 ± 0.71

3.09 ± 0.67

3.55 ± 0.85

IBQ PE

3.94 ± 1.27 (n = 76)

5.46 ± 0.65

4.92 ± 1.18

5.46 ± 1.03

  1. ^In mix-modality samples, where T2 is usable, T2 was used preferentially.