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Table 1 Characteristics of the study population, women aged 18 to 21 years and aged 31 to 40 years.

From: A cross-sectional study of different patterns of oral contraceptive use among premenopausal women and circulating IGF-1: implications for disease risk

 

Ages 18 to 21 (n = 180)

Ages 31 to 40 (n = 148)

 

Mean (SD)

Range

Mean (SD)

Range

IGF-1 (ng/ml)

315.4 (104.1)

94.0 - 620.0

174.4 (56.7)

33.0 - 314.0

Age (years)

19.7 (1.1)

18 - 21

35.3 (3.1)

31 - 40

BMI (kg/m2)

23.3 (4.2)

17.5 - 48.9

25.6 (5.5)

17.4 - 50.8

Height (cm)

162.8 (6.9)

146.0 - 183.0

162.7 (5.7)

145.0 - 175.0

Weight (kg)

62.0 (13.7)

44.6 - 139.6

67.9 (15.0)

44.0 - 135.1

Days since last period

16.7 (9.7)

1.0 - 41.0

15.9 (8.9)

1.0 - 35.0

Ethnicity n(%)

    

European

69 (39)

 

97 (65)

 

East Asian

56 (31)

 

11 (7)

 

South Asian

17 (10)

 

7 (5)

 

Other/Mixed a

37 (21)

 

34 (23)

 

Parous n(%)

0 (0)

 

36 (24)

 

OC use n(%)

    

Never

100 (56)

 

37 (25)

 

Past

29 (16)

 

88 (59)

 

Current

51 (28)

 

24 (16)

 

Ever physical activity n(%)b

    

Childhood

169 (94)

 

127 (85)

 

Teenage

149 (83)

 

118 (79)

 

Current

129 (72)

 

126 (85)

 
  1. a Includes African, Caribbean, Middle Eastern, First Nation, Latin American; b Doing physical activity at least once per week
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