Table 1 Characteristicsa of mothers and their offspring and cord blood levels of IGF-1, IGF-2, and IGFBP-3

From: Insulin-like growth factor levels in cord blood, birth weight and breast cancer risk

 

Boston ( n =92)

Shanghai ( n =110)

Age (years)

31.0 (3.0)

25.1 (3.3)

Maternal height (cm)

164.1 (7.2)

160.2 (4.9)

Maternal height

  

 ⩽1.63 m

46 (50.0%)

81 (73.6%)

 >1.63 m

46 (50.0%)

29 (26.4%)

Parity

  

 1

48 (52.2%)

109 (99.1%)

 2

44 (47.8%)

1 (0.9%)

Duration of gestation (weeks)

40.1 (1.1)

40.0 (1.1)

Maternal weight gain (kg)b

11.5 (3.9)

8.9 (4.5)

Gender of offspring

  

 Male

46 (50.0%)

64 (58.2%)

 Female

46 (50.0%)

46 (41.8%)

Birth weight (g)

3557.7 (490.2)

3492.6 (459.8)

Birth length (cm)

50.6 (2.5)

49.8 (3.1)

IGF-1 (ng ml−1)

98.4 (37.8)

79.0 (48.9)

IGF-2 (ng ml−1)

492.5 (100.3)

587.8 (140.1)

IGFBP-3 (ng ml−1)

2419.1 (1696.8)

3265.3 (2186.4)

  1. IGF=insulin-like growth factor.
  2. Uncomplicated full-term singleton pregnancies in Boston, USA and Shanghai, China.
  3. a For continuous variables mean (s.d.); for categorical variables n (%).
  4. b Until the 27th week of gestation.
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