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The Scandinavian Medical Alcohol Board(SMAB) hosted the conference in Stockholm on October 30th 1998 at which
some of the leading scientists in the field of alcohol and health
discussed important issues about alcohol and womens' health.
- Prof.A.W.Jones,Sweden opened the debate by asking if the female body is more sensitive
to alcohol than the male body? Women tend to be smaller than men,
and they have more fatty tissue per kg body weight than men: drink-for-drink
this increases the exposure of organs and tissue to alcohol. Furthermore,
with a body weight of 65kg a male has 38.9L body water while a
female has 31L.; alcohol, therefore, is more concentrated in the
body fluids of women consuming the same number of drinks as a
male. Men also have a more efficient metabolism of alcohol than
women due to a higher gastric alcohol dehydrogenase activity,
so women will have a higher blood alcohol content from the same
dose. Finally a swifter rate of hepatic clearance of alcohol will
expose the female body to a higher concentration of acetaldehyde,
the toxic metabolite of alcohol. The sum of these physiological factors makes women more sensitive
to alcohol than men. protected from coronary heart disease(CHD) as much, or more than men, with relative risks versus non-drinkers
of 0.3-0.8.In the Framlingham study CHD mortality over 24 years
for non-smokers drinking one unit per day was 1.9% versus 5.5%
for non-drinkers. Prof. Ellison then reported that data for stroke is more limited, but for women
drinking in moderation there seems to be protection against thromboembolic
stroke( the most common stroke in the West and US) but an increased
risk for hemorrhagic stroke. Prof. Ellison, in a ten year study, is finding that from age 55 to 75, women
who average one unit a day live longer than non-drinkers, even
when at a low risk of CHD and at a high risk of breast cancer.
- Dr Luc Letenneur, France, presented his findings on alcohol and dementia. His team studied 3.675 initially non-demented elderly subjects
over 8 years. 2,913 participated in the follow up in which subjects
were divided between non-drinkers (reference group), mild drinkers
(1-2 units per day), moderate drinkers (3-4 units daily) and heavy
drinkers. During the 8 year period, there were 278 cases of dementia
including 198 cases of Alzheimer's disease. Moderate cosumption
of wine was associated with a significantly lower risk of dementia.
- Prof Calle Bengtsson, Sweden discussed alcohol and diabetes. In the prospective population study of women in Gothenburg,
which began in 1968/69 the incidence of diabetes was lowest in
women who drank at least weekly and highest in abstainers. Fasting
serum insulin concentration at baseline was statistically lower
in women drinking weekly, suggesting that moderate consumption
has a favourable effect on insulin metabolism in women, and may
have a protective effect with respect to diabetes.
- Prof. Klaus Jung, Germany, covered the conflicting evidence associating alcohol with weight gain.One theory is that even modest consumption results in weight increase,
whereas the opposing opinion is that additional alcohol calories
result in effective weight reduction. Alcohol is associated with
the induction of the MEOS (microsomal ethanol oxidising system),
the increased sympathic tonicity and the associated thermal genesis,
as well as an increased ATP breakdown. Prof Jung concluded that alcohol taken moderately at mealtimes is unlikely
to influence weight gain.
- Adj. Prof. Judith Gavaler, US has been studying whether moderate alcohol intake reacts with
oestrogen replacement therapy (ERT) to alter the levels of oestradiol achieved and thus the response
to therapy. In clinical practice, ERT is used to alleviate menopausal
symptons and to protect against osteoporosis and CHD. The dose
of ERT is frequently titrated on the basis of symptom relief,
however, levels of oestradiol are rarely monitored. Prof Gavaler
evaluated hormone levels and response rates in a diverse sample
of 170 postmenopausal women being treated with conjugated equine
oestrogens (CEE). Based on the Ansbacher criterion,anadequate
response was defined as an oestradiol level of >45pg/ml. In the total sample, 93 (54.7%) were responders, while
a surprising 77 (45.3%) were non-responders. The prevalence of
moderate drinking (49% vs. 29%) and the proportion of women drinking
>1drink a week (33% vs. 17%) were higher in responders. Both oestradiol
and estrone were significantly correlated with CEE dose and total
weekly drinks, suggesting that moderate alcohol intake interacts
significantly in a complex manner with ERT to modulate response
to therapy.
Finally osteoporosis and its clinical consequences as a major health care problem in
the West were discussed by Prof. Olof Johnell, Sweden. Prof. Johnell idenified several risk factors associated with osteoporosis and
fragility, one of which is alcohol.Most epidemiological studies
have shown that minor to moderate intake has no negative effect
on bone mass, and can have a better effect on mass than no alcohol.However,
alcoholics have been shown to have reduced bone mass and a significant
increase in fractures, due both to reduced bone mass and also
to a tendency to fall over more often! Prof Johnell concluded that more research is needed. Other subjects discussed
included the hepatotoxic effects of alcohol, alcohol and pregnancy and female problem drinkers.
For further information please contact SMAB, details on the back
cover of AIM. Dr Erik Skovenborg is Chairman of SMAB and a member
of the AIM editorial board
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