Page 50 - Sample Moderate prematurity, socioeconomic status, and neurodevelopment in early childhood

Chapter 4
Table 1 Characteristics of study participants according to socioeconomic statusa
Variable
Low SES
Intermediate SES
High SES
P value
Total % (n) Variable, % (n)
MP birth
SGA (< P10)b
Male gender
Age of child (months)c
43-47
< 43 or > 47 Family composition
Two-parent family
One-parent family Number of siblings
0
1
2 ≥3
Age of mother < 25
25-34
> 34
Ethnicity of mother
Netherlands European Non-European
Education of motherd Low
Low to intermediate Intermediate to high High
Education of fatherd Low
Low to intermediate Intermediate to high High
Family income, eurod < 850
851 - 1150 1151 - 1750 1751 - 3050 3051 - 3500
≥ 3501
17.8 (259)
71.8 (186) 10.0 (26) 58.7 (152)
91.6 (186) 8.4 (17)
87.7 (222) 12.3 (31)
19.3 (50) 48.6 (126) 20.5 (53) 11.6 (30)
13.1 (32) 67.8 (166) 19.2 (47)
89.3 (226) 0.8 (2) 9.9 (25)
7.8 (20) 83.2 (213) 9.0 (23)
-
10.7 (24) 79.6 (179) 9.8 (22)
-
5.5 (10) 24.3 (44) 42.5 (77) 27.6 (50)
- -
63.6 (928)
61.7 (573) 8.3 (77) 53.4 (496)
90.5 (711) 9.5 (75)
94.4 (874) 5.6 (52)
16.2 (150) 56.0 (520) 21.6 (200) 6.3 (58)
8.0 (72) 74.2 (668) 17.8 (160)
95.1 (876) 2.2 (20) 2.7 (25)
0.4 (4) 19.3 (179) 61.2 (567) 19.0 (176)
1.1 (10) 26.7 (242) 51.2 (465) 21.0 (191)
0.6 (4)
3.1 (22) 15.3 (110) 68.2 (489) 9.1 (65) 3.8 (27)
18.6 (271)
57.6 (156) 8.5 (23) 52.4 (142)
88.6 (218) 11.4 (28)
98.5 (266) 1.5 (4)
13.7 (37) 56.5 (153) 23.2 (63) 6.6 (18)
1.1 (3) 72.5 (192) 26.4 (70)
97.4 (261) 1.5 (4) 1.1 (3)
-
-
13.8 (37) 86.2 (232)
-
0.4 (1) 9.7 (26)
90.0 (242)
- - -
27.1 (61) 24.4 (55) 48.4 (109)
.002 .67 .26 .54
< .001 .037
< .001
< .001 < .001
< .001
< .001
a Low SES, scores ≤ mean - 1 SD on standardised SES scale; intermediate SES, scores > mean - 1 SD and ≤ mean + 1 SD; high SES, scores > mean + 1 SD.
b SGA, small for gestational age; i.e. birth weight below the 10th percentile of the Dutch Kloosterman growth charts.
c Age at completing the Ages and Stages Questionnaire; uncorrected calendar age. d Extensive information on SES indicators is defined in the Methods section.
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