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Table 1 Demographic data [mean(SD)]

From: First and second trimester urinary metabolic profiles and fetal growth restriction: an exploratory nested case-control study within the infant development and environment study

Variable

Overall (n = 158)

FGR Case (n = 53)

Control (n = 105)

p-value*

Maternal Age

(yrs)

29.4 (6.2)

29.5 (6.4)

29.3 (6.1)

0.91

Maternal BMI

(kg/m2)

27.9 (7.0)

27.9 (7.6)

27.8 (6.7)

0.98

Site

    

1.0

 

UCSF

29

10 (18%)

19 (19%)

 
 

UMN

21

7 (13%)

14 (13%)

 
 

URMC

93

31 (59%)

62 (58%)

 
 

UW

15

5 (10%)

10 (9%)

 

Parity

    

0.86

 

0

94

31 (58%)

63 (60%)

 
 

≥1

64

22 (42%)

42 (40%)

 

Gestational Age at Birth

(wks)

39.4 (1.8)

38.6 (2.4)

39.8 (1.1)

< 0.0001

Birth weight

(g)

3154 .3 (621)

2526.5 (421)

3471.1 (448)

< 0.0001

Sex

    

0.96

 

Male

75

25 (47%)

50 (48%)

 
 

Female

83

28 (53%)

55 (52%)

 

Smoker at T1

 

14 (9%)

5 (10%)

9 (9%)

1.00

Cigarettes per wk. (n = 14)

Med (IQR)

21 (3–35)

28 (25–35)

7 (2–21)

0.14

Pregestational Diabetes

 

2

0

2 (2%)

0.55

Chronic Hypertension

 

4

2 (4%)

2 (2%)

0.60

  1. *p-values for Maternal Age, BMI, Gestational Age, and Birthweight are from T-tests. P-values Site, Parity, Sex, and Smoker are from chi-square tests. P-value for Cigarettes per week is from Wilcoxon rank sum test. P-values for Pregestational Diabetes and Hypertension are from Fisher’s exact test