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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