ABSTRACT
Objective@#To explore the relationship between overnight urinary sodium to potassium ratio and the risk of cardiovascular disease (CVD).@*Methods@#A subsample of 10 percent of the participants (35-59 years old) from the People's Republic of China-United States Collaborative Study of Cardiovascular and Cardiopulmonary Epidemiology (prospective survey) were used. Three consecutive overnight urine samples were collected in the autumn of 1983-1984 and the spring in 1985-1986, respectively. Urinary sodium and potassium were detected and calculated for 8 hours excretion. The occurrences of cardiovascular events were recorded in 2 years interval from 1987-1988 until December 31, 2005. Participants were divided into first ratio group, second ratio group, and third ratio group based on the tertiles of sodium to potassium ratio. Cox proportional hazard regression model was used to determine the relationship between sodium to potassium ratio and risk of CVD. In addition, participants were divided into 2 subgroups by the median of overnight urinary sodium and potassium, and then combined each other for 4 subgroups including low sodium-low potassium group, low sodium-high potassium group, high sodium-low potassium group, and high sodium-high potassium group, to explore the relationship between different sodium-potassium combinations and the risk of CVD.@*Results@#A total of 954 participants were included in the final analysis, of whom 459 (48.1%) were males. There were 318 cases in the first, second and third ratio group, respectively. There were 347 cases in low sodium-low potassium group and high sodium-high potassium group, and 130 cases in low sodium-high potassium group and high sodium-low potassium group. After a median follow-up of 18.6 (18.3, 19.3) years, cardiovascular events occurred in 81 participants, including 64 stroke and 20 coronary heart disease events. Multivariate analysis showed that comparing with the first ratio group, the hazard ratios (HR) in the second and the third ratio groups were 2.04 (95%CI 1.06-3.95, P=0.034) and 2.07 (95%CI 1.07-4.03, P=0.032), respectively. The CVD risk in low sodium-low potassium group was 24% higher than the low sodium-high potassium group (reference), but this result did not reach statistical significant level (P=0.685). The risks in high sodium-high potassium group (HR=3.32, 95%CI 1.26-8.76,P=0.015) and high sodium-low potassium (HR=3.04, 95%CI 1.05-8.83, P=0.041) group were both significantly increased.@*Conclusions@#Overnight urinary sodium to potassium ratio is positively correlated with the risk of cardiovascular events. High urinary sodium plays a more important role for the increased risk of cardiovascular events than low potassium.
ABSTRACT
Objective To explore the effect of the surgical treatment in neonates with congenital heart disease(CHD) and the factors related to the perioperative mortality during cardiopulmonary bypass. Methods Totally,666 neonates undergo-ing CHD operation were reviewed in a single center from Jan 2006 to Dec 2014,of which,431 cases had complete cardiopul-monary bypass records. Analysis was performed to investigate the association between perioperative mortality and potential fac-tors,especially the cardiopulmonary bypass factors during different periods. In the multivariate Cox proportional hazard model, factors with statistical significance(P < 0. 1)in the univariate analysis were included in the model,such as,surgeon grouping, year of surgery,Aristotle score,preoperative weight,preoperative and intraoperative sodium bicarbonate volume and postopera-tive low cardiac output. Results The neonates enrolled ranged 8 - 22 days after birth,and 2. 7 - 3. 6 kg at weight. The mor-tality rate decreased from 23. 7％ in 2006 to 12. 4％ in 2014,showing a gradual decline(P = 0. 02). The mortalities of differ-ent CHDs were:pulmonary atresia(24. 4％),coarctation of the aorta( 16. 7％),transposition of the great arteries( 13. 1％), total anomalous pulmonary venous connection( 11. 0％),ventricular septal defect( 10. 6％),and so on. The volume of preop-erative and intraoperative 5％ sodium bicarbonate was 30(20 - 50)mL in death group,higher than that in survival group[23 ( 15 - 30)ml]. While the preoperative weight was 3. 1(2. 7 - 3. 5)kg,lower than that in survival group[3. 3(3. 0 - 3. 6) kg]. The total amount of Plasmalyte/ Ringer,erythrocytes,ultrafiltration volume and the cardiac assist ratio were higher in the death group than in the survival group. After controlling the confounding effect of surgeons,the multivariable Cox proportional hazard model showed that:the independent risk factors for perioperative mortality were pulmonary atresia[aHR = 3. 89( 1. 78 -8. 42)],5％ sodium bicarbonate volume ≥50 ml[aHR = 2. 62( 1. 14 - 6. 04)],erythrocytes volume > 200 ml[aHR = 2. 26 ( 1. 1 - 4. 06)]and postoperative low cardiac output[aHR = 6. 76(3. 30 - 13. 87)]. Conclusion During the study period, the preoperative mortality for neonates with CHD had a dramatical decrease,although the preoperative risk factors for the pa-tients increased. Pulmonary atresia repair surgery had the highest mortality in neonates. Factors associated with the periopera-tive mortality includedpreoperative acidosis and postoperative low cardiac output. There is a significant association between the improvement of perioperative mortality and the improvement of the technology of minimized cardiopulmonary bypass circuit dur-ing neonatal operation. It is suggested that the total erythrocytes volume maintains less than 200 ml.
ABSTRACT
Objective This retrospective cohort study aims to evaluate and compare the prognosis of surgical repair for total anomalous pulmonary venous connection(TAPVC) with different drainage type.Methods From January 2006 to Decem-ber 2013, 328 consecutive patients were enrolled in this study .The distribution of the defects was 109 cases with cardiac, 161 with supracardiac, 32 with infracardiac, and 26 with mixed type of the drainage into the systemic circulation .The clinical re-cords of all the patients were reviewed.Studied variables were extracted from the clinical records.Followed-up was conducted at an interval of 1 month, 3 months, 6 months and then once a year post-operation.Prevalence of peri-operative conditions were compared among four different types.Studied endpoints was defined by postoperative total death or pulmonary venous obstruc-tion(PVO), which was evaluated with Kaplan-Meier curve and multivariable Cox proportional hazard model, adjusted by differ-ent surgical strategy, emergency operation, preoperative-PVO, neonates, weight, combing with other complex cardiac defects,NYHA cardiac function, severe pulmonary hypertension and severe tricuspid regurgitation.Results There were significant discrepancyof preoperative conditions among four types of TAPVC.Patients with infracardiac TAPVC presented the most criticalsymptoms and clinical indexes, which included having largest proportion of neonates, preoperative PVO, severe NYHA grading,pulmonary hypertension and tricuspid regurgitation, having lowest body weight at operation and youngest age.The cardiopulmonarybypass time, aortic crossclamp time and mechanical ventilation time were significantly longer in infracadiac and mixedTAPVC comparing to the other two types.For early mortality(death in hospital), infracadiac(9.4%) and mixed(11.5%)TAPVC demonstrated higher rates of death than cardiac(4.6%) and supracardiac(7.5%)TAPVC, although had no statisticalsignificance.For intermediate-term results, mortality in infracadiac(21.9%) and mixed(30.8%) TAPVC were significantlyhigher than cardiac ( 8.3%) and supracardiac (11.8%) TAPVC.Reoperation was more frequently required in mixed(19.2%), then infracadiac(15.6%)TAPVC.Mixed and infracadiac types are independent risk factors for TAPVC prognosis,after adjusting by the confounding factors.Conclusion Mixed and infracadiac types are independent risk factors for postoperativedeath and PVO among TAPVC patients.This study provided evidence for clinical assessment and management strategy fordifferent types of TAPVC.
ABSTRACT
Conditional logistic regression analysis and unconditional logistic regression analysis are commonly used in case control study,but Cox proportional hazard model is often used in survival data analysis.Most literature only refer to main effect model,however,generalized linear model differs from general linear model,and the interaction was composed of multiplicative interaction and additive interaction.The former is only statistical significant,but the latter has biological significance.In this paper,macros was written by using SAS 9.4 and the contrast ratio,attributable proportion due to interaction and synergy index were calculated while calculating the items of logistic and Cox regression interactions,and the confidence intervals of Wald,delta and profile likelihood were used to evaluate additive interaction for the reference in big data analysis in clinical epidemiology and in analysis of genetic multiplicative and additive interactions.
ABSTRACT
Objective: To investigate the relationship between exercise and serum lipid level in middle-aged population. Methods: Based on “multicenter collaborative study of cardiovascular epidemiology” research, a total of 3482 subjects at the age of (35-59) years from urban and rural areas of Beijing and Guangzhou were enrolled in this study. According to daily energy expenditure of exercise (EEexer), the participants were divided into 3 groups: No exercise group, (daily) EEexer below median group and (daily) EEexer above median group. The type and duration of exercise were collected by the questionnaire, daily EEexer was calculated and the relationship between exercise and serum lipid level was estimated by covariance analysis. Results: There were 47.1% (807/1712) male and 41.1% (727/1770) female participants having exercise. With controlled age, area, education level, smoking, drinking, BMI and energy expenditure of physical activity outside of exercise (EEPA), serum levels of TC, LDL-C, non-HDL-C and TG were decreased in women by elevated EEexer groups accordingly, and among them, there were significant differences in LDL-C and non-HDL-C levels between groups, P<0.05; compared with No exercise group, in female daily EEexer above median group, LDL-C and non-HDL-C levels decreased about 0.14 mmol/L,P=0.0063 and 0.14 mmol/L, P=0.0155 respectively; while in men, TC, LDL-C, non-HDL-C and TG levels showed a decreasing trends by elevated EEexer groups but with no statistical significance. No association was found for HDL-C in men and women. Conclusion: Serum levels of LDL-C and non-HDL-C were lower in female daily EEexer above median group than No excise group, the effects were independent from working and other physical activities.
ABSTRACT
Conditional logistic regression analysis and unconditional logistic regression analysis are commonly used in case control study,but Cox proportional hazard model is often used in survival data analysis.Most literature only refer to main effect model,however,generalized linear model differs from general linear model,and the interaction was composed of multiplicative interaction and additive interaction.The former is only statistical significant,but the latter has biological significance.In this paper,macros was written by using SAS 9.4 and the contrast ratio,attributable proportion due to interaction and synergy index were calculated while calculating the items of logistic and Cox regression interactions,and the confidence intervals of Wald,delta and profile likelihood were used to evaluate additive interaction for the reference in big data analysis in clinical epidemiology and in analysis of genetic multiplicative and additive interactions.
ABSTRACT
Objective:To explore the environmental risk factors of different categories of congenital heart defects ( CHD) and provide evidence for further risk factors and prevention research of CHD pheno-types. Methods:Data of Guangdong CHD Register Study from 2004 to 2012 were used. In the study, 3 038 CHD cases and 3 038 paired controls from 34 hospitals distributed in 17 cities were registered and related information were collected using uniform, and structured questionnaires. All the CHD phenotypes were coded according to the International Classification of Diseases 10th Revision (ICD-10) and classified into 6 categories according to their pathological features. Univariate analyses were adopted to filter poten-tial risk factors for each category of CHD. Then multivariate conditional Logistic regression was used to calculate the odds ratios of the risk factors for each category of CHD. Results:The risk factors for left-to-right shunt CHD included low ( OR=2 . 63 , 95%CI:2 . 04 -3 . 39 ) or over birth weight ( OR =2 . 21 , 95%CI:1 . 47-3 . 32 ) , premature delivery ( OR=1 . 95 , 95%CI:1 . 53-2 . 49 ) , polyembryony ( OR=1. 99, 95%CI: 1. 22 -3. 26), maternal low education, mother as factory worker (OR =1. 62, 95%CI:1 . 32-1 . 98 ) , parity≥2 ( OR =1 . 38 , 95%CI: 1 . 13 -1 . 69 ) , maternal abnormal reproduction history ( OR=2 . 29 , 95%CI:1 . 75-3 . 01 ) , fever ( OR=2 . 38 , 95%CI:1 . 26-4 . 48 ) , virus infection ( OR=1 . 80 , 95%CI:1 . 29 -2 . 51 ) , medicine usage ( OR=1 . 73 , 95%CI:1 . 11 -2 . 69 ) , passive smoking ( OR=1 . 69 , 95%CI:1 . 26-2 . 29 ) , chemical agent contact ( OR=8 . 71 , 95%CI:2 . 33 -32 . 58 ) , living in newly decorated houses ( OR=2 . 56 , 95%CI:1 . 60-4 . 09 ) or room close to the main road ( OR=1 . 40 , 95%CI:1 . 14-1 . 72 ) in the first 3 months of pregnancy and father as factory worker ( OR=1 . 46 , 95%CI:1 . 23-1 . 73 ) . The risk factors for pulmonary outflow tract obstruction CHD in-cluded low ( OR =5 . 98 , 95% CI: 2 . 88 -12 . 44 ) or over birth weight ( OR = 6 . 56 , 95% CI:1. 19-36. 26), maternal low education, parity≥2 (OR=2. 08, 95%CI:1. 03-4. 22), virus infection in the first 3 months of pregnancy ( OR =4 . 30 , 95%CI: 1 . 27 -13 . 45 ) . The risk factors for left ventricular outflow tract obstruction CHD included father as factory worker ( OR=6 . 01 , 95%CI:1 . 05-34. 59). The risk factors for transposition of the great arteries included low birth weight (OR=12. 93, 95%CI:1. 14-146. 26), maternal low education, mother as factory worker (OR=3. 69, 95%CI:1. 53-8. 91). The risk factors for conditions with intra cardiac mixing of oxygenated and deoxygenated blood in-cluded parity=2 ( OR=3 . 45 , 95%CI:1 . 42-8 . 38 ) . The risk factors for other CHD included over birth weight (OR=4. 87, 95%CI:1. 19-19. 94), maternal abnormal reproduction history (OR=2. 96, 95%CI:1. 14 - 7. 68 ), virus infection ( OR = 4. 92, 95% CI: 1. 56 - 15. 47 ), medicine usage (OR=4. 90, 95%CI:1. 22-19. 77) or passive smoking (OR=10. 31, 95%CI:1. 25-85. 05) in the first 3 months of pregnancy. Conclusion:The environmental risk factors were discrepant among different categories of CHD. Further risk factors study of CHD phenotypes should be performed specially. To prevent CHD, attention should be paid to the risk factors which are related to multi or complex categories of CHD.
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the appropriate cut-off values of waist circumference(WC)for central obesity and severe central obesity in Chinese adults.</p><p><b>METHODS</b>A total of 10 265 participants aged 35-69 years from the cross-sectional survey of the PRC-USA Collaborative Study of Cardiovascular and Cardiopulmonary Epidemiology between 1993 and 1994 with integral data were included. Each integer unit in centimeters of WC in a given range was used as the cut-off point to detect clustering of risk factors, which was defined as an individual with 2 or more risk factors including hypertension, diabetes, hypercholesterolemia, hypertriglyceridemia and low levels of high-density lipoprotein cholesterol. Sensitivity, specificity and distance from the receiver operating characteristic (ROC) curves to the upper left corner of the ROC graph were calculated. The WC value corresponding to the point on the ROC curve nearest to the upper left corner was considered as the optimal cut-off value for central obesity and the value corresponding to the point with specificity of 90% or more was considered as the optimal cut-off for severe central obesity.</p><p><b>RESULTS</b>The mean WC was (80.5 ± 9.9) cm in men and (77.8 ± 10.0) cm in women; 18.1% (890/4 921) of men and 14.5% (776/5 344) of women were identified with two or more major risk factors. Based on the ROC curve analysis, the optimal value of WC to detect clustering of risk factors was ≥ 84 cm for men and ≥ 80 cm for women, and the shortest distance to the upper left corner was 0.430 and 0.450, respectively. The cut-off values of WC to detect clustering of risk factors with specificity of 90% or more were ≥ 93 cm and ≥ 91 cm for men and women, respectively.</p><p><b>CONCLUSION</b>The cut-off points of WC for central obesity and severe central obesity in Chinese adults obtained from this study are equal or similar to the WC cut-off values proposed by the Guidelines for Prevention and Control of Overweight and Obesity in Chinese Adults.</p>
Subject(s)
Adult , Aged , Female , Humans , Male , Middle Aged , Asian People , Cholesterol, HDL , Cross-Sectional Studies , Diabetes Mellitus , Hypercholesterolemia , Hypertension , Hypertriglyceridemia , Obesity, Abdominal , ROC Curve , Risk Factors , Waist CircumferenceABSTRACT
<p><b>OBJECTIVE</b>To observe the long term trends of blood lipid and glucose change in Guangzhou urban and rural natural population.</p><p><b>METHODS</b>We cross-sectionally studied individuals 35 to 65 years of age (50% male) from People' Republic of China-United States cardiovascular and cardiopulmonary epidemiology research study using random sampling design in Guangzhou Shipyard and Panyu Dashi Town (Dashi Street and Luopu Street now) in 1983 and 1984 (n = 4 548), 1998 (n = 1 593), 2004 (n = 2 095)and 2011 (n = 1 692). Prevalence of dyslipidemia and pathoglycemia were standardized to the WHO world standard population. Blood lipid and glucose levels were compared in this cohort during the 28 years.</p><p><b>RESULTS</b>(1) The age adjusted mean average levels of blood lipid and glucose and the standardized prevalence rate of dyslipidemia and increased blood glucose as well as cardiovascular risk factors were significantly higher in the urban than in the rural residents and higher in male than in female participants (P < 0.01 or 0.05).(2) The age adjusted mean level of blood total cholesterol (TC), triglyceride (TG), glucose and high density lipoprotein cholesterol (HDL-C) increased from 1983/1984 to 2004 year in both urban and rural residents, and trended to be stable or decreased thereafter.(3) Standardized prevalence of multiple cardiovascular risk factors, such as high blood TG, low HDL-C, blood lipid disorder, fasting blood glucose level and diabetes, steadily increased from 1983/1984 to 2004 and this increasing trend was slowed or reversed thereafter, except the prevalence rate of high blood TC.</p><p><b>CONCLUSIONS</b>Except for high blood TC, the prevalence of multiple cardiovascular risk factors, such as high blood TG, low HDL-C, higher fasting blood glucose and diabetes, tended to be under control after 2004 in this cohort. Further efforts are warranted to strengthen this positive trend in the natural population.</p>
Subject(s)
Adult , Aged , Female , Humans , Male , Middle Aged , Blood Glucose , Metabolism , China , Epidemiology , Diabetes Mellitus , Epidemiology , Lipids , Blood , Risk Factors , Rural Population , Urban PopulationABSTRACT
ObjectiveTo explore the predictive effect of serum TC/HDL-C ratio on ischemic and hemorrhagic stroke incidence in middle aged Chinese population.MethodsA prospective study was conducted based on the PRC-USA Collaborative Study on Cardiovascular and Cardiopulmonary Epidemiology. A total of 10 121 individuals (4921 men and 5200 women), aged 35—59 years were selected from 4 cohorts, in Beijing and Guangzhou, urban and rural. The average following up time was 15.9 years. During the follow-up period, 277 ischemic and 125 hemorrhagic stroke cases were diagnosed.ResultsThe age adjusted incidence rate of ischemic stroke was 144.1,169.4,166.7,226.9 and 282.2 in the group of TC/HDL-C ratio