Alcohol consumption and risk of type 2 diabetes mellitus among US male physicians.

OBJECTIVE: To examine the association between low to moderate alcohol consumption and the incidence of type 2 diabetes mellitus (DM) in men. DESIGN: Prospective cohort study. SUBJECTS AND METHODS: Over an average period of 12.1 years, we evaluated 20 951 participants in the Physicians' Health Study between ages 40 and 84 years who were free of cardiovascular disease, cancer, and diabetes and provided data on alcohol consumption at baseline. MAIN OUTCOME MEASURE: Type 2 DM diagnosed after randomization. RESULTS: Among 20 951 physicians, 766 cases of incident DM were reported over an average follow-up period of 12.1 years. After adjustment for age, randomized treatment assignment, smoking, physical activity, and body mass index, the relative risk estimates and 95% confidence intervals for those reporting alcohol use of rarely/ never, 1 to 3 drinks per month, 1 drink per week, 2 to 4 drinks per week, 5 to 6 drinks per week, and 1 or more drinks per day were 1.00 (referent), 1.03 (0.80-1.33), 0.89 (0.70-1.14), 0.74 (0.59-0.93), 0.67 (0.51-0.89), and 0.57 (0.45-0.73), respectively (linear trend, P<.001). Additional adjustment for baseline history of hypertension, high cholesterol level, or parental history of myocardial infarction or family history of diabetes (data collected at 9 years) did not materially alter the results. These associations persisted in analyses stratified by age, smoking status, body mass index, physical activity, and family history of DM. CONCLUSION: These data indicate that apparently healthy men who self-select for light to moderate alcohol consumption have a decreased subsequent risk of type 2 DM.

Vasectomy and subsequent cardiovascular disease in US physicians.

Due to previous animal research suggesting accelerated atherosclerosis following vasectomy, we examined whether vasectomy increases the risk of subsequent cardiovascular disease (CVD), including myocardial infarction (MI), angina pectoris, coronary revascularization, and stroke, in the US Physicians' Health Study. Of 22,071 US male physicians participating in the study, aged 40 to 84 years at entry and free from cardiovascular disease and cancer, 21,028 reported on the 60-month questionnaire whether they had undergone vasectomy prior to randomization. Of the 4546 physicians with vasectomy, 1159 had undergone the procedure at least 15 years before entry. During 258,892 person-years of follow-up, we documented 773 cases of MI (719 nonfatal and 54 fatal), 1907 cases of angina pectoris or coronary revascularization, and 604 confirmed cases of ischemic or hemorrhagic stroke (566 nonfatal and 38 fatal). When compared to men without prior vasectomy, the multivariate relative risk (RR) of total MI adjusted for age and other coronary risk factors was 0.94 (95% confidence interval [CI], 0.77-1.14) among men with vasectomy. Risk estimates for fatal and nonfatal events did not appreciably differ from each other. For angina or coronary revascularization or both, the multivariate relative risk was 0.99 (0.88-1.12) and for total stroke the RR was 0.95 (0.75-1.21). For men who had undergone vasectomy 15 or more years previously, the multivariate relative risks were 0.98 (0.73-1.32) for total MI, 1.17 (0.87-1.57) for total stroke, and 1.12 (0.94-1.35) for angina/revascularization. These results provide reassuring evidence that vasectomy does not materially increase the risk of subsequent cardiovascular disease, even 15 or more years following the procedure.

PIP: This paper examines the effects of vasectomy on cardiovascular health of 22,071 US male physicians, aged 40-84 years, free from cardiovascular disease (CVD) and cancer at entry to the US Physicians' Health Study. A total of 1159 out of 44,545 physicians had their vasectomy at least 15 years before entry. Results showed that during 258,892 person-years of follow-up, there were 773 cases of myocardial infarction (MI), 719 nonfatal and 54 fatal; 1907 cases of angina pectoris or coronary revascularization; and 604 cases of ischemic or hemorrhagic stroke, 566 nonfatal and 38 fatal. The multivariate relative risk (RR) of MI cases adjusted for age and other coronary risk factors was 0.94 among men with vasectomy as compared to those without prior vasectomy. For both angina and coronary revascularization, the multivariate RR was 0.99; for stroke, the RR was 0.95. The multivariate RR for men who had undergone the procedure 15 or more years previously was 0.98 (0.73-1.32) for total MI, 1.17 (0.87-1.57) for total stroke, and 1.12 (0.94-1.35) for angina pectoris/revascularization. With these results, it was evident that vasectomy does not increase the risk of subsequent CVD, even 15 or more years after the procedure.

Results of cochlear implantation in patients with severe to profound hearing loss--implications for patient selection.

In patients with some residual hearing and minor benefit from conventional hearing aids, the benefits of cochlear implantation have to be weighed carefully against eventual adverse effects. In this study, pre- and post-operative thresholds as well as functional results after cochlear implantation are reported; 17 of 44 implanted adults had residual hearing pre-operatively (mean threshold(250 to 4000 Hz): 106 dB HL) in the implanted ear. Residual hearing in the implanted ear could not, in general, be preserved post-operatively. Seventeen of 44 implanted children had some amount of residual hearing in the implanted ear pre-operatively (implanted ear: 114 dB HL; contralateral ear: 109.9 dB HL; mean thresholds(250 to 4000 Hz))). Contrary to the results in adults, residual hearing in the implanted ear remained statistically unchanged. Hearing in the contralateral ear increased significantly from 109.9 to 101.9 dB HL post-operatively. This increase was mainly attributed to maturation of the central auditory pathway. In adults with residual hearing, the monosyllable word recognition scores increased significantly from 9 per cent pre-operatively to 42 per cent post-operatively. Children with residual hearing tended to perform better on speech-related test material compared to children without prior auditory experience. Cochlear implantation is indicated in adults and children with residual hearing and minor benefit from conventional amplification. The contralateral ear in children should be considered for additional acoustical stimulation.

Physical activity in the treatment and prevention of diabetes.

The current available epidemiologic evidence supports a substantial benefit from maintaining a physically active, as compared to a sedentary life-style. Clinician counseling and prescription of regular physical activity should represent a major goal in the treatment and primary prevention of diabetes. This responsibility is of paramount importance, particularly in light of the high prevalence of physical inactivity (based on national survey data, 56% of men and 61% of women in the United States either never or irregularly engage in physical activity), and the high incidence of diabetes and its complications, including severe atherosclerotic disease, in the United States and throughout the world.

A secondary prevention trial of antioxidant vitamins and cardiovascular disease in women. Rationale, design, and methods. The WACS Research Group.

The evidence for a potential benefit of antioxidant vitamins in the prevention and therapy of atherosclerotic disease is derived from laboratory, clinical, and observational epidemiologic studies but remains inconclusive. Data from randomized clinical trials are sparse, particularly for women. Therefore, it is both timely and important to conduct large-scale primary and secondary prevention trials of antioxidants and cardiovascular disease (CVD). The Women's Antioxidant and Cardiovascular Study (WACS) is a randomized, double-blind, placebo-controlled secondary prevention trial of the balance of benefits and risks of antioxidant vitamins (vitamins E and C, and beta-carotene) among 8000 women with preexisting CVD. This secondary prevention trial will be conducted as a companion to the recently started Women's Health Study, a primary prevention trial of vitamin E and beta-carotene, as well as aspirin. In the WACS, US female health professionals aged 40 years and older with a history of myocardial infarction, angina pectoris, coronary revascularization, stroke, transient cerebral ischemia, carotid endarterectomy, or peripheral artery surgery will be randomly assigned, utilizing a 2 x 2 x 2 factorial design, to receive vitamin E, vitamin C, beta-carotene, and/or placebo. Cardiovascular end points include nonfatal myocardial infarction, nonfatal stroke, coronary revascularization procedures, and total CVD mortality. The present article describes the rationale, design, and methods of the trial.

Primary prevention of non-insulin-dependent diabetes mellitus.

Non-insulin-dependent diabetes mellitus (NIDDM) is one of the most prevalent chronic conditions worldwide. Despite an important role of genetic factors, NIDDM can be viewed as a largely preventable disease. In this article, the current epidemiologic evidence on potentially modifiable determinants of NIDDM is reviewed, including obesity, body fat distribution, physical activity, and dietary factors. Cigarette smoking, parity, and exogenous hormone use are also addressed. Achievable reductions in the risk of NIDDM by favorably altering the modifiable determinants of NIDDM were estimated to be 50%-75% for obesity and 30%-50% for physical activity. Inconsistent results have been observed between specific dietary factors, including saturated fat, sugar, and fiber intake. Data are currently insufficient to provide a reliable estimate of the influence of diet in the prevention of NIDDM. No randomized clinical trial data are available to prove conclusively the benefits of favorable modifications of body weight, body fat distribution, physical activity, and diet on the risk of NIDDM. An extension of research activities to include randomized trials of primary prevention strategies, as well as further observational, clinical, and laboratory research, is needed and strongly recommended.

[The 1990 Bochum cholesterol and blood screening program. Incidence and degree of treatment of cardiovascular risk factors]. / Bochumer Cholesterin- und Blutdruckscreening 1990. Häufigkeit und Behandlungsgrad kardiovaskulärer Risikofaktoren.

STUDY: Over a four-week period, 1,454 inhabitants of the town of Bochum (567 men = 39%, 887 women = 61%) were screened for cardiovascular risk factors. The sample was recruited from voluntary participants, two-thirds of whom were aged between 50 and 69. RESULTS: Age-adjusted mean total plasma cholesterol levels were 223 mg/dl for women, and 218 mg/dl for men. Age-adjusted mean systolic blood pressure were 136.7 mmHg for women, and 140.8 mmHg for men. The corresponding diastolic levels were 85.0 mmHg for women and 87.8 mmHg for men. The prevalence of hypercholesterolemia (greater than or equal to 250 mg/dl) was 32.8%, that of hypertension (greater than or equal to 160/95 mmHg) was 32.7%. Age- and sex-specific mean figures and prevalences were lower for total cholesterol and markedly higher for blood pressure as compared with representative German studies. Previously unknown hypertension (greater than or equal to 160 mmHg systolic and/or greater than or equal to 95 mmHg diastolic) was detected in 10%, and hypercholesterolemia (total cholesterol greater than or equal to 250 mgdl) in 16%. A reply postcard was received from the family doctors of only 11% of participants with elevated levels. This means that the follow-up rate remained far below the hoped-for level. CONCLUSIONS: Population screening can be useful in promoting primary and secondary cardiovascular disease by alerting the population to classical risk factors and informing participants about their own personal situation. In order to motivate individuals with high risk factors to act upon this information, screening should be associated with follow-up.

[Epidemiology of risks in the workplace]. / Epidemiologie der Risiken am Arbeitsplatz.

Epidemiologic studies of occupationally exposed subjects allow to detect diseases caused by the work environment and to identify hazardous exposures. They provide the basis for preventive measures and workers compensation. Occupational epidemiology traditionally emphasized the study of work related cancer. Long latency periods for the development of most cancers and limited information about the exposure history of the study subjects are problems for all study types. The specific advantages and limitations of different study designs are discussed. Research strategies in occupational epidemiology are demonstrated using as an example two studies from the American tire and rubber industry. The specific contributions of a historical cohort study and a nested case-control study, concerning the association between lymphosarcoma and exposure to solvents, are discussed. Experiences and first results from a historical cohort study in the German rubber industry are reported. Future research in occupational epidemiology should concentrate more on the study of work related morbidity such as musculoskeletal disorders, hearing loss, accidents and the influence of the work environment on the mental and physical well being. Modern research methods such as prospective cohort studies or workforce monitoring should be used more often. Prospective cohort studies provide quantitatively and qualitatively more precise information about exposures and potential confounders, e.g. cigarette smoking or alcohol consumption, than traditional study methods. The promising perspectives of biological markers warrant further research. The situation of occupational epidemiology in Germany can only be improved if all concerned parties and institutions realize the importance of occupational epidemiology. Laws concerning data confidentiality which seriously hamper epidemiologic research must be modified.

Diagnosis and management of hypertension by physicians in the Federal Republic of Germany.

Diagnosis and management of hypertension by physicians in two large cities in the northwest of Germany were studied in 1988. Three hundred and fifteen out-of-hospital physicians (71%) responded to a mailed questionnaire. Sixty-eight per cent reported measuring blood pressure at almost each patient visit and 36% involved allied health professionals in the measurement process. Only 63% used disappearance of sound for the diastolic reading (phase V). A comparison with US data from 1987 showed that German physicians started drug therapy at higher levels of diastolic blood pressure than their American colleagues. Only 43% of the German physicians initiated antihypertensive medication at diastolic blood pressure values below 100 mmHg; this compares with 92% for US physicians. In Germany, beta-blockers were clearly preferred as step-one therapy for young patients, while diuretics were prescribed for the majority of the older patients. Forty per cent reported reducing or stopping antihypertensive medication when the blood pressure was controlled.

[Surgical ligation of patent ductus arteriosus on the intensive care unit in small premature infants]. / Ductusligatur auf der Intensivstation bei kleinen Frühgeborenen.

This paper summarizes the experience with ligation of persistent ductus arteriosus in prematures performed in the intensive care unit during the years 1986 to 1988. Records of 35 operated prematures on artificial ventilation were analyzed retrospectively. Management and organization of the operation are described. For comparison, records were analysed of 47 prematures, also artificially ventilated, who during the years 1978 to 1986 had to be transported to an operating theatre over a distance of 3 or 10 km for the ligation.

Knowledge and attitudes towards hypertension and hypercholesterolemia in a population of southern Germany: results from a population survey in the Augsburg area.

The survey was conducted to assess knowledge and attitudes of a population in Southern Germany towards hypertension and hypercholesterolemia. A questionnaire, mailed to a random sample of 2000 citizens of the Augsburg area between 25 and 74 years of age, was responded by 67%. Knowledge about determinants and complications of hypertension or hypercholesterolemia was considerably high. Major deficiencies were found in knowledge about personal values and recommended definitions of the two risk factors. Fifty eight percent claimed to know their personal blood pressure value, but merely 14% reported to know their personal blood cholesterol value. Just 21% were able to give the correct definition of hypertension and 10% defined hypercholesterolemia correctly. People had more trust in the effect of lowering high blood pressure (54%) to prevent heart disease than in the effect of lowering high blood cholesterol (43%). Sixty percent claimed to take some kind of actions to control their blood pressure and blood cholesterol.