Greater arterial stiffness in polycystic ovary syndrome (PCOS) is an obesity--but not a PCOS-associated phenomenon.
BACKGROUND
Polycystic ovary syndrome (PCOS) and obesity are associated with cardiovascular disease, but it is unclear to what extent they contribute independently. Arterial stiffness might link obesity and PCOS to cardiovascular diseases.


OBJECTIVE
Our objective was to investigate whether PCOS in the presence or absence of obesity is linked with arterial stiffness.


METHODS
We conducted a cross-sectional study, including 31 obese (18 with PCOS) and 39 lean (22 with PCOS) women.


METHODS
Estimates of arterial stiffness were obtained by ultrasonography (distensibility and compliance of carotid, femoral, and brachial arteries; carotid elastic modulus; and intima-media thickness) and pulse wave transit time analyses (carotid-femoral pulse wave velocity and aortic augmentation index).


RESULTS
Obese women, with or without PCOS, had stiffer arteries than lean women. After adjustment for 24-h mean arterial pressure and age, obesity was inversely associated with the femoral, brachial, and carotid distensibility coefficients [β (95% confidence interval), -0.354 (-0.614 to -0.094), -0.354 (-0.547 to -0.161), and -0.248 (-0.370 to -0.126) 10(-3)/kPA, respectively] and with the femoral and carotid compliance coefficients [-0.296 (-0.563 to -0.029) and -0.190 (-0.377 to -0.003) mm(2)/kPA, respectively] but not with the brachial compliance coefficient [-0.018 (-0.052-0.015) mm(2)/kPA], Young's elastic modulus [0.049 (-0.005-0.103) kPA], aortic pulse wave velocity and aortic augmentation index [0.050 msec (-0.959-1.058 msec) and -1.831% (-8.196-4.534%), respectively]. Analyses with waist circumference as key independent variable gave broadly similar results. In contrast, PCOS was not associated with arterial stiffness estimates after adjustment for the presence of obesity.


CONCLUSIONS
In young obese women with PCOS, (central) obesity, rather than PCOS itself, is associated with increased arterial stiffness. These data emphasize that, from the perspective of cardiovascular risk reduction, the focus should be on central fat mass reduction in obese women with PCOS.
Ketel
I J
IJ
Division of Reproductive Medicine, Department of Obstetrics and Gynecology, Vrije Universiteit Medical Centre (VU), Amsterdam, The Netherlands. ijg.ketel@vumc.nl
Stehouwer
C D
CD
Henry
R M
RM
Serné
E H
EH
Hompes
P
P
Homburg
R
R
Smulders
Y M
YM
Lambalk
C B
CB
D000328:Adult; D001011:Aorta / Q000000981:diagnostic imaging / Q000473:pathology; D001158:Arteries / Q000000981:diagnostic imaging / Q000473:pathology*; D001916:Brachial Artery / Q000000981:diagnostic imaging / Q000473:pathology; D002318:Cardiovascular Diseases / Q000150:complications* / Q000453:epidemiology; D016022:Case-Control Studies; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D009765:Obesity / Q000150:complications* / Q000000981:diagnostic imaging / Q000453:epidemiology / Q000473:pathology; D011085:Polycystic Ovary Syndrome / Q000150:complications* / Q000000981:diagnostic imaging / Q000453:epidemiology / Q000473:pathology; D014463:Ultrasonography; D014655:Vascular Resistance / Q000502:physiology*; D055815:Young Adult