For non-oral HT , decreases in lipoprotein(a ) , cell adhesion molecules , and factor VII generally were significant , resistance to activated protein C ( APCr ) was slightly increased , and other markers including CRP and homocysteine did not change .
Compared with oral HT , changes in CRP and APCr were smaller , changes in cell adhesion molecules and some fibrinolytic parameters tended to be smaller , whereas changes in other factors including lipoprotein(a ) and homocysteine did not differ .
( S ) Potentially unfavorable changes seen with oral HT on two important markers , CRP and APCr , are substantially smaller with non-oral HT .
Non-oral HT has minor effects on the other cardiovascular risk markers studied .
Therefore , compared with oral HT , non-oral HT appears be safer with respect to atherosclerotic and venous thromboembolic disease risk
OBJECTIVE To review the effects of non-oral administration of postmenopausal hormone therapy ( HT ) on risk markers for atherosclerotic and venous thromboembolic disease .
Non-oral postmenopausal HT appears not to increase venous thromboembolic risk , whereas the effect on coronary heart disease risk is less clear .
The effect of hormone replacement therapy and route of administration on selected cardiovascular risk factors in post-menopausal women.
BACKGROUND There is increasing use of hormone replacement therapy ( HRT ) by post-menopausal women . Observational epidemiological studies have shown reductions in cardiovascular risk factors in  HRT users in the USA , but no r and omized controlled trials of HRT have been carried out in the primary practice setting . Previous studies of cardiovascular risk factors have shown a variety of responses according to type of progestagen and oral or topical administration . None has examined the effect of route using an identical progestagen . OBJECTIVES Our aim was to establish differences , if any , in alteration in cardiovascular risk factors with HRT in post-menopausal women according to route of administration of HRT , oral , transdermal and implant , using first oestrogen alone then oestrogen plus norethisterone , or testosterone for implant . METHODS Subjects were recruited by letter of invitation to women aged 50 - 65 years from lists in general practice s local to the Charing Cross Hospital Lipid Clinic in West London . Their menopausal status was confirmed and they were r and omized to one of three treatment groups or acted as controls . They attended for three visits ; at baseline , HRT was initiated as oestrogen alone , oral or transdermal . At the 3-month visit , HRT with the progestagen , norethisterone , was given cyclically , continuously or transdermally until the final visit at 6 months . A separate group of women from the menopause clinic at Chelsea and Westminster Hospital were studied on oestrogen implant then on implanted oestrogen and testosterone . The outcome measures studied were the separate effects of the four regimes as compared with controls on lipoproteins , glucose , insulin , fibrinogen , factor VII and E-selectin , together with weight , waist : hip ratio and blood pressure . RESULTS The continuous combined oestrogen-progestagen therapy had similar effects on cardiovascular risk factors as oestrogen with cyclical progestagen . All regimes lowered low-density lipoprotein cholesterol , the oral route being more potent than the parenteral ; the effect of transdermal HRT was similar to the implant . Lp(a ) was reduced only with the oral route . Reductions in factor VII and E-selectin were observed in both the oral and transdermal routes . There was no increase in body mass index , waist : hip ratio , blood pressure or glucose and insulin levels with any of the HRT regimes used . Systolic blood pressure was reduced with the transdermal route . CONCLUSIONS This study supports the evidence that oestrogen-progestagen HRT , both oral and transdermal , although attenuating some of the benefit of oestrogen alone on fibrinogen and high-density lipoprotein , significantly reduces cardiovascular risk factors , which should diminish post-menopausal risk of coronary disease
For non-oral HT , decreases in lipoprotein(a ) , cell adhesion molecules , and factor VII generally were significant , resistance to activated protein C ( APCr ) was slightly increased , and other markers including CRP and homocysteine did not change .
Compared with oral HT , changes in CRP and APCr were smaller , changes in cell adhesion molecules and some fibrinolytic parameters tended to be smaller , whereas changes in other factors including lipoprotein(a ) and homocysteine did not differ .
( S ) Potentially unfavorable changes seen with oral HT on two important markers , CRP and APCr , are substantially smaller with non-oral HT .
Non-oral HT has minor effects on the other cardiovascular risk markers studied .
Therefore , compared with oral HT , non-oral HT appears be safer with respect to atherosclerotic and venous thromboembolic disease risk
OBJECTIVE To review the effects of non-oral administration of postmenopausal hormone therapy ( HT ) on risk markers for atherosclerotic and venous thromboembolic disease .
Non-oral postmenopausal HT appears not to increase venous thromboembolic risk , whereas the effect on coronary heart disease risk is less clear .