Table 1 Medians (Lower and Upper Quartiles) or Counts (%) for Matching and Outcome Variables.

From: Trace biomarkers associated with spontaneous preterm birth from the maternal serum metabolome of asymptomatic nulliparous women – parallel case-control studies from the SCOPE cohort

 

Cork

Auckland

Term Birth

N = 109

Spontaneous Preterm Birth

N = 55

Term Birth

N = 102

Spontaneous Preterm Birth

N = 55

Maternal BMI*

23.4 (21.8, 25.8)

24.0 (21.6, 26.3)

23.5 (21.7, 26.0)

23.5 (21.5, 27.0)

Maternal Age (years)*

30 (27, 32)

30 (27, 34)

31 (28, 33)

32 (29, 34)

Birthweight (g)

3600 (3350, 3830)

2520 (2045, 2795)

3560 (3320, 3884)

2540 (2173, 2995)

Gestational age at delivery (weeks)

40.6 (39.9, 41.3)

35.3 (33.7, 36.4)

40.4 (39.3, 41.1)

35.7 (34, 36.4)

Gestational age at delivery

    <28 weeks

N/A

3 (6%)

N/A

3 (6%)

    28–32 weeks

 

4 (7%)

 

2 (4%)

    32–34 weeks

 

9 (16%)

 

8 (15%)

    34–37 weeks

 

39 (71%)

 

42 (76%)

Preterm Premature Rupture of Membranes

Yes

N/A

29 (53%)

N/A

25 (45%)

No

 

26 (47%)

 

30 (55%)

  1. *t-tests: Cork p-values 0.68 for age, 0.47 for BMI; Auckland 0.66 and 0.54 respectively.