Prospective association of serum androgens and sex hormone-binding globulin with subclinical cardiovascular disease in young adult women: the "Coronary Artery Risk Development in Young Adults" women's study.
BACKGROUND
The role of endogenous androgens and SHBG in the development of cardiovascular disease in young adult women is unclear.


OBJECTIVE
Our objective was to study the prospective association of serum androgens and SHBG with subclinical coronary and carotid disease among young to middle-aged women.


METHODS
This was an ancillary study to the Coronary Artery Risk Development in Young Adults (CARDIA) study, a population-based multicenter cohort study with 20 yr of follow-up.


METHODS
Participants included 1629 women with measurements of serum testosterone and SHBG from yr 2, 10, or 16 and subclinical disease assessment at yr 20 (ages 37-52 yr).


METHODS
Coronary artery calcified plaques (CAC) and carotid artery intima-media thickness (IMT) were assessed at yr 20. The IMT measure incorporated the common carotid arteries, bifurcations, and internal carotid arteries.


RESULTS
SHBG (mean of yr 2, 10, and 16) was inversely associated with the presence of CAC (multivariable adjusted odds ratio for women with SHBG levels above the median = 0.59; 95% confidence interval = 0.40-0.87; P = 0.008). SHBG was also inversely associated with the highest quartile of carotid-IMT (odds ratio for women with SHBG levels in the highest quartile = 0.56; 95% confidence interval = 0.37-0.84; P for linear trend across quartiles = 0.005). No associations were observed for total or free testosterone with either CAC or IMT.


CONCLUSIONS
SHBG levels were inversely associated with subclinical cardiovascular disease in young to middle-aged women. The extent to which low SHBG is a risk marker or has its own independent effects on atherosclerosis is yet to be determined.
Calderon-Margalit
R
R
Departments of Epidemiology, University of Washington, Seattle, Washington 98101, USA. ronitc@u.washington.edu
Schwartz
S M
SM
Wellons
M F
MF
Lewis
C E
CE
Daviglus
M L
ML
Schreiner
P J
PJ
Williams
O D
OD
Sternfeld
B
B
Carr
J J
JJ
O'Leary
D H
DH
Sidney
S
S
Friedlander
Y
Y
Siscovick
D S
DS
D000293:Adolescent; D000328:Adult; D000728:Androgens / Q000097:blood*; D002114:Calcinosis / Q000097:blood / Q000473:pathology; D002318:Cardiovascular Diseases / Q000097:blood* / Q000209:etiology*; D016022:Case-Control Studies; D015331:Cohort Studies; D003324:Coronary Artery Disease / Q000097:blood / Q000473:pathology; D018450:Disease Progression; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008875:Middle Aged; D011446:Prospective Studies; D012307:Risk Factors; D012738:Sex Hormone-Binding Globulin / Q000032:analysis*; D055815:Young Adult
D000728:Androgens; D012738:Sex Hormone-Binding Globulin