Environmental tobacco smoke and heart disease: a correction.
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Biomedical subjects
Publications and source records attributed to D Rennie.
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BACKGROUND: An increasing proportion of spending by the pharmaceutical industry has gone to funding symposiums that are published by peer-reviewed medical journals. This study tests the hypothesis that such sponsorship, particularly by a single pharmaceutical company, is associated with a promotional orientation of the symposium and a distortion of the peer-review process. METHODS: We counted the symposiums published in 58 journals of clinical medicine and surveyed the journal editors regarding their policies for symposium issues. We analyzed the symposium issues that appeared in the 11 journals that published the most symposiums in order to determine the sponsor or sponsors, the topics, whether the titles were misleading, whether brand names were used, and whether the featured drugs were classified by the Food and Drug Administration as innovative or approved. RESULTS: The number of symposiums published per year increased steadily from 1966 through 1989. Forty-two percent of those analyzed (262 of 625) had a single pharmaceutical company as the sponsor. These symposiums were more likely than those with other sponsors to have misleading titles (P less than 0.001) and to use brand names (P less than 0.001), and less likely to be peer-reviewed in the same manner as other articles in the parent journal (P less than 0.001). Of the 161 symposiums that focused on a single drug, 51 percent concerned unapproved therapies; 14 percent concerned drugs classified as bringing important therapeutic gains. CONCLUSIONS: Symposiums sponsored by drug companies often have promotional attributes and are not peer-reviewed. Financial relations among symposium participants, sponsors, and journals should be completely disclosed, symposiums should be clearly identified, and journal editors should maintain editorial control over contributions from symposiums.
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Since acute mountain sickness (AMS) is associated with rapid ascent and with fluid retention, we assessed clinical status and fluid homeostasis in men slowly ascending on foot over 3 d to 4559 m and remaining at this altitude 5 d. We studied 15 male mountaineers, 6 of whom had previously had repeated, severe AMS or high altitude pulmonary edema (HAPE), at 1170 m, 3611 m, and 4559 m. We found that four of the six subjects with previous AMS or HAPE compared with none of nine with no such history, developed these conditions. Those who remained well had a diuresis that could not be overcome by increasing fluid intake and no change in renin activity, plasma aldosterone, or atrial natriuretic peptide (ANP). Those who became ill showed considerable weight gain independent of fluid intake, and a great increase in ANP which correlated with measurements of right atrial cross section. We conclude that mountaineers who have previously experienced repeated AMS or HAPE get fluid retention despite slow ascent and that this is associated with widening of the atrium and an increase in ANP.
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