|
Mean |
SD |
Range |
Mean |
SD |
Range |
t |
p |
Infant characteristics |
|
|
|
|
|
|
|
|
Gestation age (weeks)
|
39.69
|
.90
|
38.14 - 41.14
|
40.30
|
1.01
|
39 - 42
|
-1.366
|
.191
|
Birth weight (grams)
|
3665.5
|
323.08
|
3105 – 4050
|
3579.5
|
391.66
|
3085 - 4395
|
.565
|
.580
|
Apgar minute 1
|
8.20
|
2.098
|
3 – 9
|
8.88
|
.354
|
3 – 9
|
-.895
|
.384
|
Apgar minute 5
|
9.10
|
.568
|
8 – 10
|
9.13
|
.641
|
8 - 10
|
-.088
|
.931
|
Age at scan from birth (days)
|
23.40
|
1.01
|
11 - 36
|
26.75
|
6.36
|
19 - 40
|
-.960
|
.351
|
Sociodemographic variables |
|
|
|
|
|
|
|
|
Maternal age (years)
|
29.60
|
5.06
|
34.0 – 37.5
|
29.63
|
4.57
|
24 - 36
|
-.011
|
.991
|
Maternal BMI
|
27.19
|
5.03
|
21.26 – 34.42
|
26.29
|
3.55
|
21.05-33.06
|
.424
|
.678
|
Frequencies
|
|
|
|
|
|
|
|
|
Ethnicity (Caucasian/Non-Caucasian)
|
10/0
|
10/0
|
10/0
|
8/0
|
8/0
|
8/0
|
|
|
Maternal Education
(1 = High school graduate or lower;
2 = College degree;
3 = University degree)
|
2/2/6
|
2/2/6
|
2/2/6
|
4/3/1
|
4/3/1
|
4/3/1
|
|
|
Family SES
(1 = < 500;
2 = 501-1000;
3 = 1001-1500;
4 = 1501-2000;
5 = 2001-2500;
6 = 2501-3000;
7 = 3001-3500;
8 = 3501- 4000;
9 = > 4000)
|
1/0/1/5/3/0/0/0/0
|
1/0/1/5/3/0/0/0/0
|
1/0/1/5/3/0/0/0/0
|
1/1/0/5/0/0/0/1/0
|
1/1/0/5/0/0/0/1/0
|
1/1/0/5/0/0/0/1/0
|
1/1/0/5/0/0/0/1/0
|
|
Maternal smoking during pregnancy (yes/no)
|
0/10
|
0/10
|
0/10
|
1/7
|
1/7
|
1/7
|
1/7
|
|
Maternal use of illicit substances during pregnancy (yes/no)
|
0/10
|
0/10
|
0/10
|
0/8
|
0/8
|
0/8
|
0/8
|
|
Maternal emotional state |
|
|
|
|
|
|
|
|
EPDS score
|
3.10
|
2.33
|
0 - 7
|
3.62
|
4.34
|
0 - 11
|
-.329
|
.746
|
SCL score
|
3.80
|
3.01
|
0 - 10
|
1.87
|
2.64
|
0 -8
|
1.421
|
.174
|