Table 1

Means of serum IGF-I, IGFBP-3, and molar ratio (IGF-I: IGFBP-3), by sex and age, Singapore Chinese Health Study

SexAge (years)Number of subjectsIGF-I (ng/ml)IGFBP-3 (ng/ml)Molar ratio (IGF-I:IGFBP-3)*1000
MenAlla3121443714140
50–54771614047144
55–641331443732141
65–741021313425135
P for linear trend by age0.00010.00010.13
WomenAlla3261214143103
50–54701304335108
55–641631234153105
65–7493112399597
P for linear trend by age0.040.020.05
P by sexa0.00010.00010.0001
  • a Adjusted for age at specimen collection as a continuous variable.