Optimal glucose, HbA1c, glucose-HbA1c ratio and stress-hyperglycaemia ratio cut-off values for predicting 1-year mortality in diabetic and non-diabetic acute myocardial infarction patients

Background Stress-induced hyperglycaemia at time of hospital admission has been linked to worse prognosis following acute myocardial infarction (AMI). In addition to glucose, other glucose-related indices, such as HbA1c, glucose-HbA1c ratio (GHR), and stress-hyperglycaemia ratio (SHR) are potential predictors of clinical outcomes following AMI. However, the optimal blood glucose, HbA1c, GHR, and SHR cut-off values for predicting adverse outcomes post-AMI are unknown. As such, we determined the optimal blood glucose, HbA1c, GHR, and SHR cut-off values for predicting 1-year all cause mortality in diabetic and non-diabetic ST-segment elevation myocardial infarction (STEMI) and non-ST-segment elevation myocardial infarction (NSTEMI) patients. Methods We undertook a national, registry-based study of patients with AMI from January 2008 to December 2015. We determined the optimal blood glucose, HbA1c, GHR, and SHR cut-off values using the Youden’s formula for 1-year all-cause mortality. We subsequently analyzed the sensitivity, specificity, positive and negative predictive values of the cut-off values in the diabetic and non-diabetic subgroups, stratified by the type of AMI. Results There were 5841 STEMI and 4105 NSTEMI in the study. In STEMI patients, glucose, GHR, and SHR were independent predictors of 1-year all-cause mortality [glucose: OR 2.19 (95% CI 1.74–2.76); GHR: OR 2.28 (95% CI 1.80–2.89); SHR: OR 2.20 (95% CI 1.73–2.79)]. However, in NSTEMI patients, glucose and HbA1c were independently associated with 1-year all-cause mortality [glucose: OR 1.38 (95% CI 1.01–1.90); HbA1c: OR 2.11 (95% CI 1.15–3.88)]. In diabetic STEMI patients, SHR performed the best in terms of area-under-the-curve (AUC) analysis (glucose: AUC 63.3%, 95% CI 59.5–67.2; GHR 68.8% 95% CI 64.8–72.8; SHR: AUC 69.3%, 95% CI 65.4–73.2). However, in non-diabetic STEMI patients, glucose, GHR, and SHR performed equally well (glucose: AUC 72.0%, 95% CI 67.7–76.3; GHR 71.9% 95% CI 67.7–76.2; SHR: AUC 71.7%, 95% CI 67.4–76.0). In NSTEMI patients, glucose performed better than HbA1c for both diabetic and non-diabetic patients in AUC analysis (For diabetic, glucose: AUC 52.8%, 95% CI 48.1–57.6; HbA1c: AUC 42.5%, 95% CI 37.6–47. For non-diabetic, glucose: AUC 62.0%, 95% CI 54.1–70.0; HbA1c: AUC 51.1%, 95% CI 43.3–58.9). The optimal cut-off values for glucose, GHR, and SHR in STEMI patients were 15.0 mmol/L, 2.11, and 1.68 for diabetic and 10.6 mmol/L, 1.72, and 1.51 for non-diabetic patients respectively. For NSTEMI patients, the optimal glucose values were 10.7 mmol/L for diabetic and 8.1 mmol/L for non-diabetic patients. Conclusions SHR was the most consistent independent predictor of 1-year all-cause mortality in both diabetic and non-diabetic STEMI, whereas glucose was the best predictor in NSTEMI patients.

­­­­Optimal Glucose and Stress-hyperglycaemia Ratio Cut-off Values for Predicting 1-year Mortality in Diabetic and Non-diabetic Acute Myocardial Infarction Patients

Background Stress-induced hyperglycaemia at time of hospital admission has been linked to worse prognosis following acute myocardial infarction (AMI). The stress-hyperglycaemia ratio (SHR) index normalises the acute increase in blood glucose values to background glycaemic status. However, the optimal cut-off blood glucose and SHR values for predicting adverse outcomes post-AMI are unknown. As such, we determined the optimal blood glucose and SHR cut-offs for predicting 1-year all cause mortality in diabetic and non-diabetic non-ST-segment elevation myocardial infarction (NSTEMI) and ST-segment elevation myocardial infarction (STEMI) patients. Methods We undertook a national, registry-based study of patients with AMI from January 2008 to December 2015. We determined the optimal blood glucose and SHR cut-off values using the Youden’s formula for 1-year all-cause mortality. We subsequently analyzed the sensitivity, specificity, positive and negative predictive values of the cut-offs in the diabetic and non-diabetic subgroups, stratified by the type of AMI. Results There were 5,841 STEMI and 4,105 NSTEMI in the study. In STEMI patients, both glucose and SHR were independent predictors of 1-year all-cause mortality [Glucose: OR 2.19 (95% CI 1.74–2.75); SHR: 2.19 (95% CI 1.73–2.78)]. However, in NSTEMI patients, glucose and SHR were not independently associated with 1-year all-cause mortality [Glucose: OR 1.37 (95% CI 1.00-1.89); SHR: 1.27 (95% CI 0.91–1.78)]. In STEMI patients, ROC analysis showed that SHR performed better than glucose (AUC for glucose 0.633 versus AUC for SHR 0.692, P < 0.001) in diabetic patients, whereas in non-diabetic patients, SHR and glucose performed equally well (AUC for glucose 0.720 versus AUC for SHR 0.717, P < 0.664). The optimal glucose cut-off values were 15.0mmol/L for diabetic STEMI patients and 11mmol/L for non-diabetic STEMI patients and the corresponding optimal cut-off values for SHR were 1.7 and 1.5, respectively. Conclusions Glucose on admission and SHR were independent predictors of 1-year all-cause mortality in STEMI, whereas this was not the case in NSTEMI patients. In STEMI setting, SHR performed better than admission glucose to predict 1-year all-cause mortality in diabetic patients, whereas in non-diabetic patients both SHR and glucose performed equally well.

The FREQUENCY OF STRESS HYPERGLYCEMIA AND MORTALITY IN PATIENTS WITH HYPERGLYCEMIA IN MEDICAL INTENSIVE CARE UNIT

Objective: To assess the frequency of stress hyperglycemia and mortality in patients with hyperglycemia admitted in medical Intensive Care Unit. Study Design: Cross-sectional study. Place and Duration of Study: Medical Intensive Care Unit, Combined Military Hospital Quetta, from Nov 2018 to Jun 2019. Methodology: A total of 150 adult patients of age between 18-80 years, of both genders, with Intensive Care Unit stay >24 hours, who were treated in medical Intensive Care Unit during study period, were included in the study. Those patients with duration of stay <24 hours, paediatric patients, surgical and pregnant patients and those who were on chronic steroid therapy and those who were given TPN and dextrose infusions were excluded. The blood sugar fasting was measured daily and blood sugar random was measured on admission and twice daily. The patients were segregated into three groups: Normoglycemia, Diabetes mellitus and Stress hyperglycaemia. The frequency of patients and outcome of patients in terms of death was observed in all groups. Results: The mean age of study population was 55.02 ± 18.14 years, with 99 (66%) were males while 51 (34%) were females. Among study population 77 (51.3%) had normoglycemia, 46 (30.7%) had Diabetes Mellitus while 27 (18%) had stress hyperglycaemia. Out of 77 patients with normoglycemia 10 (12.9%) died, while number of deaths in patients with diabetes mellitus and stress hyperglycaemia was 21 (45.6%) and 15 (55.5%) respectively. The mean maximum blood glucose in those who survived and died was 214.39 ± 100.69 mg/dl and 295.26 ± 122.60................

A Study on the Relationship of Glycaemic Status with Nature of Lesions in Acute Stroke Patients

Background: Stroke in patients of Diabetes Mellitus is a common complication all over the world. The present study was done with the aim to assess the blood glucose level in acute stroke patients of Manipur and find out any correlation with types, size and prognosis of different glycaemic group. Method: The study was a prospective cross-sectional study of all patients who were admitted as acute stroke in Medicine ward, Jawaharlal Nehru Institute of Medical Sciences (JNIMS), Imphal, Manipur. Clinical parameter including History and clinical examination findings were recorded. CT scan of brain, blood glucose level, HbA1c were taken in all the patients. Results: Of 109 patients of acute stroke patients included in the study, 34 were known cases of Diabetes, 10 were newly detected Diabetes cases summing up to a total of 64 cases of Diabetes, 44 of the cases had stress hyperglycaemia and 21 were euglycaemic. Maximum cases consisted of ischaemic strokes (84.4%) and maximum number of haemorrhagic strokes falls under the known diabetes group.None of the euglycaemic patients had any large sized lesions, maximum of them (89.5%) had small sized lesions. Most of the stress glycaemia patients had medium sized strokes while the known diabetes and newly detected diabetes groups had no case of small sized lesion with the maximum large sized lesions occurring in the known diabetes group (78.9%). Clinical outcome was worst in poor glucose control group with 70.3% fatality in this group while maximum clinical improvement was seen in Non-Diabetics (84.6%) consisting of euglycaemia and stress hyperglycaemia groups. Conclusion: There was a good correlation with admission day hyperglycaemia with the size of the stroke lesion in all cases of stroke. The diabetes especially poor glucose control group is associated with increased size of the stroke lesion, severity and poor clinical outcome. Keywords: Stroke, diabetes mellitus, stress hyperglycaemia, euglycaemia.

The stress hyperglycaemia ratio is associated with left ventricular remodelling after first acute ST-segment elevation myocardial infarction

Background Left ventricular negative remodelling after ST-segment elevation myocardial infarction (STEMI) is considered as the major cause for the poor prognosis. But the predisposing factors and potential mechanisms of left ventricular negative remodelling after STEMI remain not fully understood. The present research mainly assessed the association between the stress hyperglycaemia ratio (SHR) and left ventricular negative remodelling. Methods We recruited 127 first-time, anterior, and acute STEMI patients in the present study. All enrolled patients were divided into 2 subgroups equally according to the median value of SHR level (1.191). Echocardiography was conducted within 24 h after admission and 6 months post-STEMI to measure left ventricular ejection fraction (LVEF), left ventricular end-diastolic diameter (LVEDD), and left ventricular end-systolic diameter (LVESD). Changes in echocardiography parameters (δLVEF, δLVEDD, δLVESD) were calculated as LVEF, LVEDD, and LVESD at 6 months after infarction minus baseline LVEF, LVEDD and LVESD, respectively. Results In the present study, the mean SHR was 1.22 ± 0.25 and there was significant difference in SHR between the 2 subgroups (1.05 (0.95, 1.11) vs 1.39 (1.28, 1.50), p < 0.0001). The global LVEF at 6 months post-STEMI was significantly higher in the low SHR group than the high SHR group (59.37 ± 7.33 vs 54.03 ± 9.64, p = 0.001). Additionally, the global LVEDD (49.84 ± 5.10 vs 51.81 ± 5.60, p = 0.040) and LVESD (33.27 ± 5.03 vs 35.38 ± 6.05, p = 0.035) at 6 months after STEMI were lower in the low SHR group. Most importantly, after adjusting through multivariable linear regression analysis, SHR remained associated with δLVEF (beta = −9.825, 95% CI −15.168 to −4.481, p < 0.0001), δLVEDD (beta = 4.879, 95% CI 1.725 to 8.069, p = 0.003), and δLVESD (beta = 5.079, 95% CI 1.421 to 8.738, p = 0.007). Conclusions In the present research, we demonstrated for the first time that SHR is significantly correlated with left ventricular negative remodelling after STEMI.

Stress hyperglycaemia is associated with poor functional outcomes in patients with acute ischaemic stroke after intravenous thrombolysis

Summary Background Transient hyperglycaemia in the context of illness with or without known diabetes has been termed as ‘stress hyperglycaemia’. Stress hyperglycaemia can result in poor functional outcomes in patients with acute ischaemic stroke (AIS) who underwent mechanical thrombectomy. We investigated the association between stress hyperglycaemia and clinical outcomes in AIS patients undergoing intravenous thrombolysis (IVT). Methods We examined 666 consecutive patients with AIS who underwent IVT from 2006 to 2018. All patients had a glycated haemoglobin level (HbA1c) and fasting venous blood glucose measured within 24 h of admission. Stress hyperglycaemia ratio (SHR) was defined as the ratio of the fasting glucose to the HbA1c. Univariate and multivariate analyses were employed to identify predictors of poor functional outcomes (modified Rankin Scale 3–6 at 3 months) after IVT. Results Three-hundred and sixty-one patients (54.2%) had good functional outcomes. These patients tended to be younger (60.7 ± 12.7 vs. 70 ± 14.4 years, P &lt; 0.001), male (70.7% vs. 51.5%, P &lt; 0.001), had lower prevalence of atrial fibrillation (13.0% vs. 20.7%, P = 0.008) and lower SHR (0.88 ± 0.20 vs. 0.99 ± 26, P &lt; 0.001). Patients with high SHR (≥0.97) were slightly older than those with low SHR (&lt;0.97) and were more likely to have diabetes mellitus. On multivariate analysis, higher SHR was independently associated with poor functional outcomes (adjusted odds ratio 3.85, 95% confidence interval 1.59–9.09, P = 0.003). Conclusion SHR appears to be an important predictor of functional outcomes in patients with AIS undergoing IVT. This may have important implications on the role of glycaemic control in the acute management of ischaemic stroke.