Objective To assess the effect of smoking and body mass index(BMI) on lung cancer incidence density in male workers.Methods Risk factors of cardiovascular diseases in baseline were surveyed in 1974,1979 and 1980 for 5 137 men aged more than 18 years old from Beijing Capital Steel and Iron Company.Follow-up was carried out to 2001;all diseases were identified by uniform standard.Cox proportional hazards model was used to analyze the relationship between smoking,BMI and lung cancer.Results During mean follow-ups of 20.8 years,106 cases of lung cancer occurred.The crude incident rates of lung cancer were 102.2 cases per 100 000 person-years.After adjustment for age,BMI and other established risk factors,cigarettes consumption of greater than 20 cigarettes/day versus no smoking was associated with a relative risk of lung cancer of 3.45(95% confidence interval(CI): 1.58～7.53).In categories of BMI of less than 18.5(underweight),18.5～24.9(normal weight) and more than 25 kg/m2(overweight and obesity),adjusting for age and other covariables,all workers and smoking workers both showed decreasing tendencies in relative risks of lung cancer in higher BMI groups.The pattern was similar after excluding the early 5-year lung cancer patients.Grouping in smoking and BMI levels,compared with underweight smokers,the relative risks for lung cancer of normal-weight nonsmokers and nonsmokers with overweight and obesity,as well as smokers with overweight and obesity were 0.25(95% CI: 0.08～0.84),0.16(95% CI: 0.04～0.74) and 0.23(95% CI: 0.07～0.77),respectively.Smokers with underweight had higher risk for lung cancer.Conclusion Smoking and underweight increased the risk of lung cancer.Keeping normal weight and giving up tobacco were important for the prevention of lung cancer.

Objective To explore clinical characteristics of chronic total occlusion(CTO) in population with routine coronary angiography,and to cumulate therapeutic experience.Methods Retrospective analysis was performed on clinical data of 57 cases with CTO selected from 825 patients undergone coronary angiography.Results Among 57 cases,the percentage of male,myocaridial infarction,diabetes mellitus,hyperlipidermia and left ventricular dysfunction was 73.7%,84.2%,22.8%,73.7% and 22.8%,respectively.The types of lesions included single branch(n=11),double branches(n=29) and three branches(n=17).Of 70 branches lesion vessels,44 were TIMI 0 of blood flow classification and 26 were TIMI1.The position of lesions occurred at left anterior descending branch(n=32),left circumflex branch(n=16),right coronary artery(n=22).The occlusion time was less than three months(n=41) and more than three months(n=29).The lengths of lesion was divided into less than 20 mm(n=43) and more than 20 mm(n=27).The shapes of terminal lesion looked like rat-tail(n=42) and blaze knife-edge(n=28).The coronary stents were performed at 57 lesions among 70 branches and the successful rate of operation was 82.9%.Conclusions Timely coronary angiography and selecting suitable treatment on different kinds of lesions for male patients with myocardial infraction,especially complicated with diabetes mellitus,might play important roles in prevention of CTO and in improvement of the successful rate of percutanous coronary intervention for the complex lesion.

Objective To investigate the protective effect of angiotensin converting enzyme inhibitor(ACEI) and angiotensin receptor antagonist(ARB) on renal function of type 2 diabetic nephropathy patients.Methods 60 patients with type 2 diabetic nephropathy and mild or midrange damages of renal function were observed.The patients all accepted routine diabetic therapy and were randomly divided into three groups,ACEI group,ARB group and combination group with ACEI and ARB.The blood pressure,blood creatinine and urine protein of 24 hours were measured before therapy and 8 weeks after therapy.Results The excretive amounts of urine protein decreased in all groups.The excretive levels of urine protein in combination group significantly decreased than in ACEI group and ARB group(P

Objective To investigate the status of self-controlling blood pressure and their hospitalization reasons in primary hypertensive inpatients. Method A cross-sectional survey was performed in 206 patients with primary hypertension in the hospital. Results The 58 patients did not know that they previously suffered from hypertension. They had to be in the hospital as stroke or cardiovascular disease. Those who had measures of self-controlling blood pressure were taken a proportion of 59.22%. The proportion of those who regularly took drugs was only 10.68%. The regular checking rate of blood pressures was 12.14%. Because there was not any or irregular measures, it was increased that the hypertensive patients with stroke or cardiovascular disease in the hospital. Conclusion It is one of the major factors for increasing patients with hypertension in the hospital that lacking the know-ledge which is relevant to prevention and treatment of hypertension. The results indicated that medical staff on non-communicative diseases prevention should educate the hypertensive patients, enhance self-protecting awareness and encourage them to cultivate health lifestyles and simultaneously take comprehensive prevention and treatment measure on hypertension. These suggest it be also necessary to carry out health education in border town especially in rural area and minority nationality regions.

Objective To explore the relation of the polymorphism of GSTT & GSTM1 genes with the susceptibility of breast cancer.Methods A hospital-based case-control study was conducted,and 105 normal women as a control group and 100 women cases with breast cancer were recruited.The polymorphism of GSTT1 and GSTM1 were assessed by polymerase chain reaction(PCR).Logistic regression was conducted to evaluate the odds ratio of breast cancer in relation to single,multiple gene and estrogen exposure factors.Results The results showed that significant difference was found in the distribution of GSTT1,GSTM1 between controls and cases.There was a negative correlation between CSTT1 & GSTM1 and the risk of breast cancer with OR of 2.133 and 2.458,respectively.Polygenic model analysis indicated that there was a statistically significant correlation of the vacancy of GSTT1 & GSTM1 with breast cancer.Furthermore,it was also revealed that individual in simultaneous lack of GSTT1 and GSTM1 would run 12 times as high risk as normal controls did(OR=12.338).Results from unconditional logistic regression analysis showed that GSTT1 and GSTM1 were significantly associated with the occurrence of breast cancer.Conclusion The study indicated that the polymorphisms of estrogen-metabolizing genes were related to the risk of breast cancer.

Objective To understand the trend of the constituent ratio of atrial fibrillation(AF)and primary etiology in hospitalized cases with chronic heart failure(CHF)and complicated with AF in late 20 years.Methods 1 180 patients with CHF(thereinto,440 complicated with AF)were selected from the hospitalized cases during the past 20 years(1983—2002),and a retrospective analysis was performed with every 5 years interval.Results The constituent ratio of AF in the general cases with CHF was 37.3%,and it was higher in females than in males(41.3% vs 33.4%,P

Objective To study the relationship between serum fibrinogen,uric acid and the severity of coronary heart disease(CHD).Methods 156 patients with or without coronary heart disease were divided into CHD group and control group.All subjects were examined by cronary artery angiography.The severity of coronary artery stenosis was evaluated and graded with Leaman coronary scoring system.With the multiple analysis method,the relationships were studied between serum fibrinogen,uric acid and the severity of coronary heart disease.Results With multiple logistic regression,smoking,age,fibrinogen,triglyceride and low-density lipoprotein were independently associated with the severity of coronary heart disease.Gender,uric acid and other variables did not have significant independently association with the severity of coronary heart disease.With stepwise multiple regression analysis,age,fibrinogen,total cholesterol,lipoprotein(a)and low density cholesterol showed significant independent association with the severity of coronary heart disease,but uric acid and other variables did not.Conclusion Fibrinogen was related to the severity of coronary heart disease independently,but uric acid was not independently associated with the severity of coronary heart disease.

Objective To examine the relationship between the levels of plasma fibrinogen and the Peripheral Arterial Occlusive Disease(PAOD)in an elderly population.Methods A population-based cross-sectional study was conducted in an urban Beijing sample of 2 680 subjects aged 60 years or older.Plasma fibrinogen was measured by the means of dispersion and comparing turbidity.PAOD was assessed by symptoms of intermittent claudication(IC)as measured by the WHO/ROSE questionnaire and an ankle-arm systolic blood pressure index(AAI)(

Objective To understand the current status of the serum lipids in the young and middle aged policemen,and to compare the detection rates of hypertension and hyperglycemia among individuals with different lipid levels.Methods Total cholesterol(TC),low density lipoprotein cholesterol(LDL-C),high density lipoprotein cholesterol(HDL-C)and triglyceride(TG)were detected in 1 980 of the young and middle aged policemen by standard methods.Lipid levels and phenotypes of dyslipidemia were classified according to the'Recommended guidelines for prevention and treatment of dyslipidemia'of China(1997).Hypertension and hyperglycemia were defined according to the WHO's standard respectively.The relationship of dyslipidemia with hypertension and hyperglycemia were studied furthermore.Results There were 47.1% of the subjects whose TG and TC levels were in the optimal levels.The detection rates of hypertension and hyperglycemia were 8.4% and 3.6% respectively.The average levels of TC and TG in male aged 31 years old and over were beyond the optimal levels.The levels of fasting blood glucose and blood pressure of those with dyslipidemia were higher than of the normal individuals generally.The detection rates of hyperglycemia and hypertension in subjects with normal serum lipids were 1.5% and 4.2%,in subjects with hypertriglyceridemia were 6.5% and 8.8%,in hypercholesterolemia subjects were 1.7% and 16.1%,and in those subjects with mixed dyslipidemia were 4.7% and 18.7% respectively.Conclusion There was a trend of high prevalence of dyslipidemia,hypertension and hyperglycemia in young policemen.

Objective To explore the spatial distribution of hypertension in recruited Chinese male youth.Methods Maps of spatial distribution on hypertension detection rates in recruited Chinese male youth were produced,using a spatial local interpolation technique with the ArcGIS8.1 software.Cross-validation techniques were used to evaluate the fitness of the distribution maps.Results The spatial distribution of hypertension detection rates in recruited Chinese male youth in 2001 showed that the detectable rate of the hypertension of the recruited male youth was distributed in sections.The sections with a higher rate included Hebei,Shandong and Beijing,as the center of the northern area,and Guangxi,as the center of the southern area.The detectable rate of diastolic pressure was found higher in the areas of northeast and north China than in other places.The prediction error of the cross-validation indicated that the spatial distribution maps of hypertension detecting rates had good fitness to hypertension detecting rates of recruited Chinese male youth.Conclusion There existed in significant spatial difference in hypertension detecting rates of recruited Chinese male youth.Influence of geographical environment,climate,and economy on adolescents' blood pressure should be further studied.