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Cancer clinical trials and publication biasFailure to publish the results of
large clinical trials can lead to bias in the literature and may contribute to
inappropriate clinical decisions. Krzyzanowska and colleagues identified
abstracts of large phase 3 clinical trials in the proceedings of the annual
American Society of Clinical Oncology meetings from 1989 through 1998 and found
that the probability of full publication by 5 years was significantly greater
for trials with significant results than for trials with nonsignificant results.
Trials with oral or plenary presentation were published sooner than those not
presented, and trials with pharmaceutical sponsorship were published sooner than
cooperative group trials or those for which sponsorship was not
specified.
JAMA
2003;290:495–501
General practice across the Tasman (and elsewhere)?All is not well with general
practice. Australian GPs along with their international colleagues, protest that
they are undervalued, overworked and no longer in control. “They feel like
hamsters on a treadmill. They must run faster just to stay still...The result of
the wheel going faster is not only a reduction in quality of care, but also a
reduction in professional satisfaction and an increase in burnout amongst
doctors.” Assemble any group of Australian GPs and talk will soon turn to
how recent Federal Government policies regulating general practice have reduced
their fiscal autonomy, increased red tape, eroded their professional time, and
diminished the quality of their clinical care.
However, a more ominous threat to the future of general
practice is its increasing unattractiveness as a vocation. Junior doctors in
Australia and North America are increasingly dissatisfied with general practice,
and are voting with their feet.
Anecdotal reasons advanced for this discontent include the
low remuneration and lack of prestige of general practice, the demands of
practice that may preclude a life beyond medicine, and the advent of competing
players in the delivery of primary care, such as nurse or alternative medicine
practitioners.
MJA
2003;179:6–7
Kurt Semm, RIP 16/7/2003 – death of a pioneerOn 13 September 1980 gynaecologist
Professor Kurt Semm performed the world’s first laparoscopic
appendicectomy at the University of Kiel in Germany. When Semm, director of the
department of obstetrics and gynaecology at Kiel University Hospital, later told
a surgical meeting what he had done, the president of the German Surgical
Society called for his suspension. The scepticism was not just confined to
Germany. When Semm tried to publish his paper on the first laparoscopic
appendicectomy it was rejected because the technique reported was assumed to be
unethical.
At the time, diagnostic laparoscopies were well accepted,
but surgical attempts – apart from gynaecological sterilisation –
were considered experimental and therefore unethical. It seemed unthinkable that
surgeons should not have a good view of the entire operation site or have direct
access and manual contact with the organs that they wished to treat, even if
Semm’s method might mean smaller incisions and reduced tissue damage. When
Semm tried to convince his colleagues from other surgical disciplines in Kiel
and elsewhere of the advantages of laparoscopic surgery – for instance,
for gall bladder removal – they were mostly sceptical or apprehensive.
Some of his co-workers asked him to have a brain scan, suspecting brain damage
or a brain disease in someone who would attempt such an extraordinarily
dangerous procedure.
Nowadays minimally invasive surgery is a scientifically
established standard procedure for certain operations.
BMJ 2003;327:397
Long-term risk of breast cancer in Hodgkin DiseaseTreatment of Hodgkin Disease (HD)
represents one of the major medical successes of the 20th century. Fifty years
ago, the typical patient survived only a few years, whereas the current 5-year
relative survival rate is 85%. In the United States alone, approximately 120 000
survivors of HD are at risk for the serious late sequelae of curative therapies,
including the occurrence of new primary cancers.
The leading cause of death in long-term survivors of Hodgkin
Disease (HD) is second malignant neoplasms. In this case-control study of breast
cancer in a cohort of female 1-year survivors of HD diagnosed at age 30 years or
younger, Travis and colleagues found that treatment with radiation alone at
doses of 4 Gy or more delivered to the breast was associated with a 3.2-fold
increased risk of breast cancer compared with patients who received lower doses
of radiation and no alkylating agents. Treatment with combined radiotherapy and
alkylating agents was associated with a 1.4-fold increased risk, whereas
treatment with alkylating agents alone was associated with a reduced risk of
breast cancer. Ovarian damage by either radiation or chemotherapy was associated
with decreased risk.
JAMA
2003;290:465–75
Deja vu – limits imposed on residents’ work hoursOn July 1, 2003, something came to
pass in the USA that had been warmly anticipated by many medical students and
residents – and dreaded by faculty and programme directors. The
Accreditation Council on Graduate Medical Education (ACGME), the private body
that accredits all 7800 US residency programmes, imposed new residency work hour
limits.
The guidelines generally limit on-duty time to 80 hours a
week and require 10 hours off between duty periods, and one continuous 24-hour
period off every 7 days. The guidelines also prohibit overnight in-house call
more than once in three nights, and ban residents from working more than 24
consecutive hours.
In the past residents in internal medicine programmes might
work 100–110 hours a week with every third night on call, and surgical
residents might work 120 hours a week with every other night on call.
Lancet
2003;362:378–9.
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