-
1.
Fasting blood glucose and risk of Stroke: A Dose-Response meta-analysis.
Shi, H, Ge, Y, Wang, H, Zhang, Y, Teng, W, Tian, L
Clinical nutrition (Edinburgh, Scotland). 2021;(5):3296-3304
Abstract
BACKGROUND & PURPOSE A growing number of studies have shown that fasting blood glucose is related to the risk of stroke, however, the dose-response association between fasting blood glucose and the risk of stroke is still unclear. Accordingly, we conducted a dose-response meta-analysis to evaluate the relationship between fasting blood glucose and the risk of stroke by summarizing cohort studies. METHODS PubMed and Embase databases were searched for related studies (until October 2020). Cohort studies examining the influence of fasting blood glucose on stroke risk were summarized. A dose-response relationship was determined using a random-effect model. RESULTS Eighteen cohort studies involving 2,555,666 participants were included. The pooled relative risk for the high-versus-low categories was 1.79 (95% CI: 1.68-1.91) in all people, and 1.16 (95% CI: 1.11-1.21) in non-diabetic people. In addition, there was a non-linear relationship between fasting blood glucose and stroke risk. The incidence of stroke was reduced to its lowest point when fasting blood glucose level was 70-100 mg/dL. CONCLUSION Fasting blood glucose was positively related to stroke risk, with a non-linear dose-response relationship.
-
2.
Interim effects of salt substitution on urinary electrolytes and blood pressure in the China Salt Substitute and Stroke Study (SSaSS).
Huang, L, Tian, M, Yu, J, Li, Q, Liu, Y, Yin, X, Wu, JH, Marklund, M, Wu, Y, Li, N, et al
American heart journal. 2020;:136-145
Abstract
The Salt Substitute and Stroke Study is an ongoing 5-year large-scale cluster randomized trial investigating the effects of potassium-enriched salt substitute compared to usual salt on the risk of stroke. The study involves 600 villages and 20,996 individuals in rural China. Intermediate risk markers were measured in a random subsample of villages every 12 months over 3 years to track progress against key assumptions underlying study design. Measures of 24-hour urinary sodium, 24-hour urinary potassium, blood pressure and participants' use of salt substitute were recorded, with differences between intervention and control groups estimated using generalized linear mixed models. The primary outcome of annual event rate in the two groups combined was determined by dividing confirmed fatal and non-fatal strokes by total follow-up time in the first 2 years. The mean differences (95% CI) were -0.32 g (-0.68 to 0.05) for 24-hour urinary sodium, +0.77 g (+0.60 to +0.93) for 24-hour urinary potassium, -2.65 mmHg (-4.32 to -0.97) for systolic blood pressure and +0.30 mmHg (-0.72 to +1.32) for diastolic blood pressure. Use of salt substitute was reported by 97.5% in the intervention group versus 4.2% in the control group (P<.0001). The overall estimated annual event rate for fatal and non-fatal stroke was 3.2%. The systolic blood pressure difference and the annual stroke rate were both in line with the statistical assumptions underlying study design. The trial should be well placed to address the primary hypothesis at completion of follow-up.
-
3.
Large HDL Subfraction But Not HDL-C Is Closely Linked With Risk Factors, Coronary Severity and Outcomes in a Cohort of Nontreated Patients With Stable Coronary Artery Disease: A Prospective Observational Study.
Li, JJ, Zhang, Y, Li, S, Cui, CJ, Zhu, CG, Guo, YL, Wu, NQ, Xu, RX, Liu, G, Dong, Q, et al
Medicine. 2016;(4):e2600
-
-
Free full text
-
Abstract
High-density lipoprotein (HDL) is highly heterogeneous in its size and composition. Till now, the link of HDL subfractions to coronary risk is less clear. We aimed to investigate the associations of HDL subfractions with traditional risk factors (RFs), coronary severity, and outcomes in a cohort of nontreated patients with stable coronary artery disease (CAD). We prospectively enrolled 591 eligible patients. Baseline HDL subfractions were separated by Lipoprint system. HDL subfractions (large, medium, and small) and HDL-cholesterol (HDL-C) levels were dichotomized into low and high group according to the 50 percentile. Coronary severity was evaluated by SYNTAX, Gensini, and Jeopardy scoring systems. Patients were followed up annually for major adverse cardiovascular events (MACEs). Cox proportional hazards' models were used to evaluate the risk of HDL subfractions on MACEs. Patients with high large HDL-C levels had a decreased number of RFs. Significantly, large HDL-C levels were negatively associated with coronary severity assessed by SYNTAX and Gensini score (both P < 0.05). New MACEs occurred in 67 (11.6%) patients during a median 17.0 months follow-up. Moreover, the log-rank test revealed that there was a significant difference between high and low large HDL-C groups in event-free survival analysis (P = 0.013), but no differences were observed in total HDL-C groups and medium or small HDL-C groups (both P > 0.05). In particular, the multivariate Cox-proportional hazards model revealed that high large HDL-C was associated with lower MACEs risk (hazard ratio [95% confidence interval] 0.531 [0.295-0.959]) independent of potential confounders. Higher large HDL-C but not medium, small, or total HDL-C is associated with lower cardiovascular risk, highlighting the potential beneficial of HDL subfractionation.
-
4.
Comparison of treatment effect estimates of non-vitamin K antagonist oral anticoagulants versus warfarin between observational studies using propensity score methods and randomized controlled trials.
Li, G, Holbrook, A, Jin, Y, Zhang, Y, Levine, MA, Mbuagbaw, L, Witt, DM, Crowther, M, Connolly, S, Chai-Adisaksopha, C, et al
European journal of epidemiology. 2016;(6):541-61
Abstract
Emerging observational studies using propensity score (PS) methods assessed real-world comparative effectiveness of non-vitamin K antagonist oral anticoagulants (NOACs) versus warfarin in patients with non-valvular atrial fibrillation (AF). We aimed to compare treatment effect estimates of NOACs between PS studies and randomized controlled trials (RCTs). Electronic databases and conference proceedings were searched systematically. Primary outcomes included stroke or systemic embolism (SE) and major bleeding. A random-effects meta-analysis was performed to synthesize the data by pooling the PS- and RCT-derived hazard ratios (HRs) separately. The ratio of HRs (RHR) from the ratio of PS-derived HRs relative to RCT-derived HRs was used to determine whether there was a difference between estimates from PS studies and RCTs. There were 10 PS studies and 5 RCTs included for analysis. No significant difference of treatment effect estimates between the PS studies and RCTs was observed: RHR 1.11, 95 % CI 0.98-1.23 for stroke or SE; RHR 1.07, 95 % CI 0.87-1.34 for major bleeding. A significant association between NOACs and risk of stroke or SE was observed: HR 0.88, 95 % CI 0.83-0.94 for the PS studies; HR 0.79, 95 % CI 0.72-0.87 for the RCTs. However, no relationship between NOACs and risk of major bleeding was found: HR 0.91, 95 % CI 0.79-1.05 for the PS studies; HR 0.85, 95 % CI 0.73-1.00 for the RCTs. In this study, treatment effect estimates of NOACs versus warfarin in patients with non-valvular AF from PS studies are found to be in agreement with those from RCTs.
-
5.
[Treating ischemic stroke patients of deficiency of qi and yin syndrome and static blood obstructing collaterals syndrome by Yangyin Yiqi Huoxue Recipe: a clinical study of therapeutic effect].
Wan, HT, Bie, XD, Yao, Z, Xu, B, Liu, H, Yang, JH, Zhang, Y, He, Y, Zhou, HF
Zhongguo Zhong xi yi jie he za zhi Zhongguo Zhongxiyi jiehe zazhi = Chinese journal of integrated traditional and Western medicine. 2015;(3):281-6
Abstract
OBJECTIVE To observe the clinical effect of Yangyin Yiqi Huoxue Recipe (YYHR, the basic recipe of Yangyin Tongnao Granule) in treatment of ischemic stroke patients of deficiency of qi and yin syndrome (DQYS) and static blood obstructing collaterals syndrome (SBOCS). METHODS Totally 312 patients were assigned to the control group (86 cases) and the treatment group (226 cases) using strati- fied randomized allocation method. Patients in the treatment group were treated with modified YYHR, while those in the control group took Xueshuan Xinmaining. The treatment course was 4 weeks for all. Constituent ratios of the acute stage and the recovery stage of DQYS and SBOCS and their complicated syndromes were observed in the two groups. Changes of the clinical curative effect, clinical symptoms integral, whole blood viscosity ratio, plasma viscosity ratio, hematocrit, erythrocyte sedimentation rate (ESR), total cho- lesterol (TC), triglyceride (TG), high density lipoprotein cholesterol (HDL-C), and low density lipoprotein cholesterol (LDL-C) were detected in the two groups before and after treatment. RESULTS There was statistical difference in constituent ratios of the acute stage and the recovery stage of DQYS SBOCS and its complicated syndromes between the two groups (P < 0.01). DQYS and SBOCS was basic syndrome types of the two groups. The cured and markedly effective rate was 71.24%(161/226) in the treatment group and 43.02% (37/86) in the control group. The total effective rate was 91.15% (206/226) in the treatment group, higher than that of the control group (76.74%, 66/86) with statistical difference (P < 0.01). There was statistical difference in the clinical symptoms integral, whole blood viscosity ratio, plasma viscosity ratio, hematocrit, ESR, TC, TG,HDL-C, and LDL-C (P < 0.05, P < 0.01). CONCLUSIONS Symptoms of ischemic stroke patients could be improved by modified YYHR. Indices such as the whole blood viscosity, plasma viscosity ratio, hematocrit, ESR, abnormal metabolism of blood lipids were also significantly improved. Pathological changes of blood stasis induced by qi-yin deficiency exist in ischemic stroke patients, and DQYS and SBOCS were basic syndrome types.
-
6.
Blood pressure and low-density lipoprotein-cholesterol lowering for prevention of strokes and cognitive decline: a review of available trial evidence.
Zanchetti, A, Liu, L, Mancia, G, Parati, G, Grassi, G, Stramba-Badiale, M, Silani, V, Bilo, G, Corrao, G, Zambon, A, et al
Journal of hypertension. 2014;(9):1741-50
Abstract
BACKGROUND AND OBJECTIVES It is well established by a large number of randomized controlled trials that lowering blood pressure (BP) and low-density lipoprotein cholesterol (LDL-C) by drugs are powerful means to reduce stroke incidence, but the optimal BP and LDL-C levels to be achieved are largely uncertain. Concerning BP targets, two hypotheses are being confronted: first, the lower the BP, the better the treatment outcome, and second, the hypothesis that too low BP values are accompanied by a lower benefit and even higher risk. It is also unknown whether BP lowering and LDL-C lowering have additive beneficial effects for the primary and secondary prevention of stroke, and whether these treatments can prevent cognitive decline after stroke. RESULTS A review of existing data from randomized controlled trials confirms that solid evidence on optimal BP and LDL-C targets is missing, possible interactions between BP and LDL-C lowering treatments have never been directly investigated, and evidence in favour of a beneficial effect of BP or LDL-C lowering on cognitive decline is, at best, very weak. CONCLUSION A new, large randomized controlled trial is needed to determine the optimal level of BP and LDL-C for the prevention of recurrent stroke and cognitive decline.
-
7.
Blood pressure and LDL-cholesterol targets for prevention of recurrent strokes and cognitive decline in the hypertensive patient: design of the European Society of Hypertension-Chinese Hypertension League Stroke in Hypertension Optimal Treatment randomized trial.
Zanchetti, A, Liu, L, Mancia, G, Parati, G, Grassi, G, Stramba-Badiale, M, Silani, V, Bilo, G, Corrao, G, Zambon, A, et al
Journal of hypertension. 2014;(9):1888-97
Abstract
BACKGROUND AND OBJECTIVES The SBP values to be achieved by antihypertensive therapy in order to maximize reduction of cardiovascular outcomes are unknown; neither is it clear whether in patients with a previous cardiovascular event, the optimal values are lower than in the low-to-moderate risk hypertensive patients, or a more cautious blood pressure (BP) reduction should be obtained. Because of the uncertainty whether 'the lower the better' or the 'J-curve' hypothesis is correct, the European Society of Hypertension and the Chinese Hypertension League have promoted a randomized trial comparing antihypertensive treatment strategies aiming at three different SBP targets in hypertensive patients with a recent stroke or transient ischaemic attack. As the optimal level of low-density lipoprotein cholesterol (LDL-C) level is also unknown in these patients, LDL-C-lowering has been included in the design. PROTOCOL DESIGN The European Society of Hypertension-Chinese Hypertension League Stroke in Hypertension Optimal Treatment trial is a prospective multinational, randomized trial with a 3 × 2 factorial design comparing: three different SBP targets (1, <145-135; 2, <135-125; 3, <125 mmHg); two different LDL-C targets (target A, 2.8-1.8; target B, <1.8 mmol/l). The trial is to be conducted on 7500 patients aged at least 65 years (2500 in Europe, 5000 in China) with hypertension and a stroke or transient ischaemic attack 1-6 months before randomization. Antihypertensive and statin treatments will be initiated or modified using suitable registered agents chosen by the investigators, in order to maintain patients within the randomized SBP and LDL-C windows. All patients will be followed up every 3 months for BP and every 6 months for LDL-C. Ambulatory BP will be measured yearly. OUTCOMES Primary outcome is time to stroke (fatal and non-fatal). Important secondary outcomes are: time to first major cardiovascular event; cognitive decline (Montreal Cognitive Assessment) and dementia. All major outcomes will be adjudicated by committees blind to randomized allocation. A Data and Safety Monitoring Board has open access to data and can recommend trial interruption for safety. SAMPLE SIZE CALCULATION It has been calculated that 925 patients would reach the primary outcome after a mean 4-year follow-up, and this should provide at least 80% power to detect a 25% stroke difference between SBP targets and a 20% difference between LDL-C targets.
-
8.
Sanchi for acute ischaemic stroke.
Chen, X, Zhou, M, Li, Q, Yang, J, Zhang, Y, Zhang, D, Kong, S, Zhou, D, He, L
The Cochrane database of systematic reviews. 2008;(4):CD006305
Abstract
BACKGROUND Currently very few drugs are supported for routine use for acute ischaemic stroke. Sanchi is one of the most widely used herbal medicines for ischaemic stroke in China. OBJECTIVES To assess the effectiveness and safety of sanchi in the treatment of acute ischaemic stroke. SEARCH STRATEGY We searched the Cochrane Stroke Group Trials Register (last searched January 2008), the Chinese Stroke Trials Register (searched February 2007), the Cochrane Complementary Medicine Field trials register (searched February 2007), the Chinese Cochrane Centre Controlled Trials Register (last searched February 2007). We also searched the Cochrane Central Register of Controlled Trials (The Cochrane Library, Issue 1, 2007), MEDLINE (1966 to February 2007), EMBASE (1980 to February 2007), CINAHL (1982 to February 2007), AMED (1985 to February 2007), CNKI (1979 to February 2007), CBM-disc (1979 to February 2007), Chinese scientific periodical database of VIP INFORMATION (1989 to February 2007), Wanfang Data (1982 to February 2007), CISCOM (1980 to February 2007), and TCMLARS (1984 to February 2007). SELECTION CRITERIA Randomised controlled trials comparing sanchi with placebo or no treatment for acute ischaemic stroke within 30 days of onset. DATA COLLECTION AND ANALYSIS Two review authors extracted data and assessed trial quality. MAIN RESULTS Eight trials involving 660 participants were included. Seven of the eight studies were of poor quality. Follow-up time was less than one month in six trials. Only two trials provided data for the number of participants who were dead or dependent at the end of 28 days of treatment, indicating a significantly lower rate of death and dependency in the sanchi group than in the control group (relative risk (RR) 0.63, 95% confidence interval (Cl) 0.45 to 0.88). One trial reported higher Barthel index scores in the sanchi group. Pooled analysis of seven trials indicated that sanchi might improve neurological deficit more than control with a significant difference (RR 0.29, 95%Cl 0.18 to 0.47). The total case fatality rate was lower than 1% indicating that participants probably had mild strokes. Few adverse events were reported. Data were limited in respect of stroke recurrence and quality of life. AUTHORS' CONCLUSIONS Sanchi appears to be beneficial and safe for acute ischaemic stroke in this review, but the small sample and inferior quality of studies prevented a definite conclusion. More well-designed randomised controlled trials are required.