Frequency of Vitamin D Receptor Gene Polymorphisms in a Population with a very High Prevalence of Vitamin D Deficiency, Obesity, Diabetes and Hypertension.

BACKGROUND: Although vitamin D levels and underlying vitamin D receptor (VDR) genetic polymorphisms have been linked to many common diseases including obesity, the association remains unclear. There is also co-existence of pathologically high proportions of obesity and vitamin D deficiency conditions in our UAE society. We therefore aimed to determine the genotypes and allele percentage frequency distribution of four polymorphisms-FokI, BsmI, ApaI and TaqI-in the VDR gene in healthy Emirati individuals and their association with vitamin D levels and chronic conditions including diabetes mellitus, hypertension and obesity. METHODS: 277 participants who were part of a randomized controlled trial had their assessment that included clinical and anthropometric data. Whole blood samples were taken for measurements of vitamin D [25(OH) D], four vitamin D receptor gene polymorphism SNPs, including BsmI, FokI, TaqI and ApaI, metabolic and inflammatory markers and related biochemical variables. Multiple logistic regression analysis was used to assess the influence of vitamin D receptor gene SNPs on vitamin D status after adjusting for clinical parameters known to influence vitamin D status in the study population. RESULTS: Overall, 277 participants with a mean (±SD) age of 41 ± 12, 204 (74%) of them being female, were included in the study. There were statistically significant differences in vitamin D concentrations between different genotypes of the four VDR gene polymorphisms (p < 0.05). There were, however, no statistically significant differences in vitamin D concentrations between subjects with and those without the four VDR gene polymorphisms genotype and alleles except for AA and AG and allele G in Apal SNP (p < 0.05). Multivariate analysis revealed no significant independent associations between vitamin D status and the four VDR gene polymorphisms after adjusting for dietary intake, physical activity, sun exposure, smoking and body mass index. In addition, no significant differences were found in the frequency of the genotypes and alleles of the four VDR genes among patients with obesity, diabetes and hypertension compared to those without these medical conditions. CONCLUSIONS: Although we found statistically significant differences in vitamin concentrations between different genotypes of the four VDR gene polymorphisms, multivariate analysis revealed no association after adjusting for clinical parameters known to influence vitamin D status. Furthermore, no association was found between obesity and related pathologies and the four VDR gene polymorphisms.

Role of Functional Biomarkers to Identify Early Vitamin B12 Deficiency in Patients with Sleeve Gastrectomy: A Cross-Sectional Study.

Background and objectives: Although laparoscopic sleeve gastrectomy (LSG) is effective for obesity management, postoperative vitamin B12 (B12) deficiency is of major concern. In this cross-sectional study, we assessed the levels of B12 and its related functional biomarkers, namely, total homocysteine (tHcy), methylmalonic acid (MMA), folate, methylcitric acid (MCA), and hemoglobin (Hb), in one-year postoperative LSG patients and matched controls. Materials and Methods: Plasma B12, tHcy, MMA, folate, and MCA were measured in matched controls (n = 66) and patients (n = 71) using validated liquid chromatography-tandem mass spectrometry techniques and protocols in the United Arab Emirates (UAE). Results: The median B12 concentration in patients (177 pmol/L) was significantly lower (p < 0.001) than in the controls (334.7 pmol/L). The tHcy and MMA levels were significantly increased (p < 0.001 and p = 0.011, respectively) and folate levels were significantly decreased (p = 0.001) in the LSG patients compared to the controls. Interestingly, no significant difference in MCA levels were observed between the two groups. The levels of tHcy and MMA were concomitantly increased with the decreased folate levels in postoperative LSG patients when compared with the controls. The Hb levels were significantly lower in males and females in the patient group compared with those in the control group, respectively (p = 0.005 and p = 0.043). Conclusions: This is the first report of serum levels of B12 and its functional biomarkers in postoperative LSG patients among a local population from the UAE. Our findings revealed significant alterations of the B12 biomarkers, total B12, MMA, and tHcy in one-year postoperative LSG patients.

Associations between low muscle mass, blood-borne nutritional status and mental health in older patients.

BACKGROUND: Although low muscle mass is an important predictor of increased physical morbidity in older patients, information on its impact on mental health and well-being is lacking. The first aim of this report is to look for associations if any between low muscle mass and mental health of older people in clinical practice. The second aim is to study underlying mechanisms including nutritional status. METHODS: In this prospective longitudinal study we randomly selected and studied 432 hospitalized older patients' baseline demographic data, clinical characteristics and nutritional status on admission, at 6 weeks and at 6 months. Low muscle mass was diagnosed using anthropometric measures based on the European Working Group criteria. Mental health outcome measures including cognitive state, depression symptoms and quality of life were also measured. RESULTS: Out of 432 patients assessed 44 (10%) were diagnosed with low muscle mass. Patients diagnosed with low muscle mass at admission and over a 6-month follow up period had significantly poor cognitive function, quality of life and increased depression symptoms compared with those with normal muscle mass. After adjustment for poor prognostic indicators, age, disability, severity of acute illness and low muscle mass were associated with poor cognitive function and quality of life and higher depression symptoms in older patients over a 6 months period (p < 0.05). Although patients with low muscle mass had lower micronutrient concentrations compared to those patients with normal muscle mass, only serum albumin showed significant correlations with quality of life at admission and depression symptoms at 6 weeks. CONCLUSION: Low muscle mass is associated with poor blood-borne poor nutritional status and mental health in hospitalized older patients, however, this is partly explained by underlying co morbidity.

Inflammatory markers and cardiovascular risks among overweight-obese Emirati women.

BACKGROUND: The prevalence of abdominal obesity among women in UAE is exceptionally high. However, its impact on cardiovascular health has not been adequately investigated. The aims of this study were to investigate: (1) correlations between inflammatory and oxidative biomarkers vs. anthropometric and metabolic measures; (2) rates of dyslipidemia, diabetes, and hypertension and (3) risks of cardiovascular disease. METHODS: One hundred ten "healthy" overweight/obese Emirati women attending nutrition counselling clinics were randomly recruited. All participants had completed questionnaire, physical examination and laboratory assessment. RESULTS: The participants' mean ± SD of age, body mass-index, waist circumference were 39 ± 9 years, 34 ± 6 kg/m(2) and 100 ± 13 cm respectively. Among the studied women 45 % met diagnostic criteria for metabolic syndrome showing a positive correlation of hsCRP with BMI (p = 0.002), body fat (p = 0.002) and waist circumference (p = 0.018). There was positive correlation of IL-6 with waist circumference (p = 0.019) and adiponectin with HDL (p = 0.007). Prevalence of HDL <1.3 mmol/L or triglycerides ≥1.7 mmol/L were 82 %, dysglycemia 31 %, and hypertension 27 and 37 % of women had either 'high' or 'moderate' calculated cardiovascular 10-year risk score. CONCLUSION: The levels of inflammatory and oxidative stress markers were highly prevalent among overweight/obese Emirati women and this may predispose to increasing cardiovascular risks at relatively young age. Thus effective strategies to impact cardiovascular burden and conducting outcome studies assessing the increased risk of cardiovascular disease and addressing obesity prevention among women are urgently needed.

Transient severe hypercholesterolemia following bariatric surgery treated successfully with increased food intake.

We describe a case of transient severe hypercholesterolemia after bariatric surgery treated successfully with increased food intake. A 25-y-old policeman who had sleeve gastrectomy for morbid obesity 10 mo previously presented with generalized weakness, constipation, and significant weight loss after severe dietary restriction. All his preoperative and prior investigations were normal. Further investigation revealed severe total and low-density lipoprotein hypercholesterolemia. After all other causes of secondary hypercholesterolemia were excluded, a diagnosis of starvation-induced hypercholesterolemia was made. The patient was therefore started on a normal mixed diet gradually increased to achieve satiation. His dietary intake, body weight, and lipid profile were monitored over a 3-mo period. Eventually his symptoms abated, weight increased, and lipid profile returned back to normal levels. Although dietary management of failed weight loss after bariatric surgery is the main priority for health professionals, this case illustrates the possible harm of severe dietary restriction after surgery and the need for judicious dietary and nutritional management.

Oxidative damage and inflammation in obese diabetic Emirati subjects.

Visceral obesity is more common in the Arab population and more closely related to morbidity, including diabetes and related cardiovascular diseases (CVD). Possible mechanisms that link visceral fat/obesity to diabetes and CVD complications include inflammation and increased oxidative stress; however, few data are available from the Arab population. Our aim was to determine whether increased adiposity in obese diabetic United Arab Emirates citizens is associated with sub-clinical inflammation and/or increased oxidative stress. A hundred diabetic patients who were part of a randomized controlled trial of nutritional supplements had their baseline characteristics assessed from anthropometric and clinical data following informed written consent. We used WHO figures to classify general and central obesity. Fasting blood samples were collected for the measurement of antioxidants and markers of oxidative damage and inflammation. We found that increased adiposity measured by both body mass index and waist circumference was associated with increased C-reactive protein (CRP) and decreased vitamin C after adjusting for age, duration and treatment of diabetes (p < 0.05). Although there is a clear trend of increased inflammatory markers, notably CRP, and decreased antioxidants with increased BMI and waist circumference in both men and women, the results are statistically significant for women only. CRP were also inversely associated with HDL. Overall, we found that BMI underestimates the rates of obesity compared to waist circumference and that increased adiposity is associated with increased inflammation and decreased HDL and antioxidant status.

Poor vitamin C status is associated with increased depression symptoms following acute illness in older people.

BACKGROUND: Vitamin C has important physical and mental health benefits and plasma concentrations reflect recent intakes. Inflammation associated with any acute illness can lead to poor appetite and low food intake in older people. The aims of this report were to assess the prevalence and clinical significance of vitamin C deficiency among hospitalized acutely-ill older patients. METHODS: Three hundred and twenty two patients (152 [47%] female), aged 65 yrs. and over who took part in a randomized, double blind, placebo-controlled trial had their nutritional status assessed from anthropometric, hematological and biochemical data at baseline, and after 6 weeks and 6 months. Vitamin C was measured using a fluorimetric technique and logistic regression analysis was performed to determine the influence of a number of clinical indicators, including tissue inflammation measured using C-reactive protein on vitamin C concentrations. Clinical outcome measures including symptoms of depression were also compared between patients with vitamin C deficiency and those with normal levels. RESULTS: At baseline, 116 (36%) patients had a vitamin C concentration below 11 µmol/L indicating biochemical depletion. The figures at 6 weeks and 6 months were 28 (22%) and 44 (28%) patients, respectively. Older age, male gender, smoking, increased dependency and tissue inflammation were associated with lower vitamin C concentrations. Patients with vitamin C biochemical depletion had significantly increased symptoms of depression compared with those with higher concentrations at baseline (p=0.035) and at 6 weeks (p=0.028). CONCLUSIONS: A high proportion of older patients had sub-optimal vitamin C status and this was associated with increased symptoms of depression.

Effect of antioxidants and B-group vitamins on risk of infections in patients with type 2 diabetes mellitus.

Previous studies have revealed that diabetic patients have a decline in immunity and an increased risk of infections, and this may be associated with poor micronutrient status. The aim of this study was to measure the effect of dietary supplements on risk of infection in patients with type 2 diabetes mellitus. One hundred patients with type 2 diabetes mellitus were randomly assigned to receive an oral dose of daily B-group vitamins and antioxidant vitamins (n = 50) or an identical placebo (n = 50) daily for 90 days. Patients had baseline, three and 12 month assessment for nutritional status, fruits and vegetables intake, physical activity and self-reported infections. Supplementation with antioxidants and B-group vitamins significantly increased the plasma concentration of vitamin E and folate and reduced homocysteine in the intervention group (p-values were 0.006, 0.001 and 0.657, respectively). The number of infections reported by the treatment group after three months of supplements was less than that reported by the placebo group, 9 (27%) vs. 15 (36%) (p = 0.623). Corresponding numbers of infections at 12 months were 25 (67.5%) and 27 (56.3%), respectively (p = 0.488). Up to 90% of the diabetic patients were either overweight or obese with a sedentary life style, and their body weight increased further during three months of follow up. The study showed that multivitamin supplements improved vitamin blood concentrations; however, this did not reduce the number of infections in diabetic patients.

Oxidative damage and inflammation in obese diabetic Emirati subjects supplemented with antioxidants and B-vitamins: a randomized placebo-controlled trail.

BACKGROUND: Obesity and related morbidities are reaching epidemic proportions in the Arab populations. Possible mechanisms that link obesity/visceral fat to diabetes and cardiovascular (CVD) complications include inflammation and increased oxidative stress. The aim of this study is to test whether supplementary antioxidants with B-group vitamins enhance antioxidant capacity and/or mitigate oxidative damage and subclinical inflammation in obese diabetic patients. METHODS: Hundred diabetic patients were randomly assigned to receive either oral dose of daily B-group vitamins (1.67 mg folic acid, 1.67 mg vitamin B-2, 20 mg vitamin B-6, 0.134 mg vitamin B-12) and antioxidant vitamins (221 mg of α-tocopherol and 167 mg of vitamin C) [n = 50], or an identical placebo [n = 50] daily for 90 days. Blood was obtained before treatment, and after 90 days for measurements of plasma antioxidant vitamins status, markers of oxidative damage [malondialdehyde (MDA) and protein carbonyls] and inflammation (C-Reactive Proteins [CRP], IL6 & TNFα). RESULTS: Supplementation with antioxidant and B-group vitamins increased plasma concentration of vitamin E and folate and reduced homocysteine in the intervention groups compared with the placebo group. Vitamin B12 improved in the supplement group compared with the decline seen in the placebo group however, this did not reach statistical significance. Vitamin C declined in both groups but more so in the intervention group. Both MDA and Protein carbonyls increased in both the supplement and the placebo group. IL6 concentration increased in both groups but less so in the supplement group (p = 0.023). TNF showed more pronounced decline in the supplement group compared with the placebo group but the difference between cumulative changes did not reach statistical significance (p = 0.204). CRP concentrations declined in the supplement group in contrast to the rise seen in the placebo group however, the difference between cumulative changes was not statistically significant (p = 0.205). CONCLUSIONS: Antioxidants supplementation with B-group vitamins enhances antioxidant capacity, and may have an anti-inflammatory effect in obese diabetic patients.

Riboflavin status in acutely ill patients and response to dietary supplements.

BACKGROUND: Although a number of studies have reported riboflavin deficiency in free-living older people, no data are available on riboflavin intake and status in older people during acute illness. METHODS: To determine the riboflavin response to dietary supplements during acute illness, 297 hospitalized, acutely ill older patients are randomly assigned to receive a daily oral nutritional supplement containing 1.3 mg of riboflavin or a placebo for 6 weeks. Outcome measures are riboflavin intake and riboflavin biochemical status at baseline, 6 weeks, and 6 months using the erythrocyte glutathione reductase activation coefficient (EGRAC), a measure of riboflavin tissue saturation. EGRAC values are inversely proportional to riboflavin status. RESULTS: Fifty-six percent of patients (167/297) have suboptimal riboflavin status (EGRAC > 1.30). No significant correlation is found between EGRAC and either total energy or riboflavin intakes. Significant correlations are found between total energy intake and riboflavin intakes both in hospital and at home (r = 0.67, P < .0001 and r = 0.57, P < .0001, respectively). Smokers and patients with chronic obstructive pulmonary disease (COPD) have lower riboflavin status (high EGRAC values) compared with nonsmokers and those without COPD. Riboflavin status improves significantly in the supplement group at 6 weeks compared with the placebo group, but status declines between 6 weeks and 6 months, after patients stop taking the supplements. CONCLUSIONS: A high proportion of acutely ill patients have suboptimal riboflavin status. Supplementation with a physiological amount of riboflavin in a mixed-nutrient supplement significantly improves riboflavin status, but the effect is transient and status deteriorates again after patients stop taking the supplements.

Dying, death and bereavement: a qualitative study of the views of carers of people with heart failure in the UK.

BACKGROUND: This paper explores carers' views of dying, death and bereavement for family members who had recently died with heart failure adding to a growing literature on end of life experiences for people with conditions other than cancer. METHODS: Twenty interviews were conducted with bereaved carers of older people with heart failure (HF) who had been participating in a longitudinal study. Carers were approached in writing 3 months after the death. Interviews were transcribed verbatim and analysed thematically with the assistance of NUD*IST. RESULTS: Findings were grouped into three time periods: prior to death; the death itself and bereavement. Most carers found discussions about end of life with their family member prior to death difficult. Dissatisfaction with the manner of the death was focused around hospital care, particularly what they believed to be futile treatments. In contrast deaths in the home were considered 'good'. Carers adopted a range of coping strategies to deal with grief including 'using their faith' and 'busying themselves' with practicalities. There was some satisfaction with services accessed during the bereavement period although only a small number had taken up counselling. DISCUSSION: Our findings suggest that an absence of discussion about end of life care wishes with family members or health professionals is a barrier to advance care planning. Carers' perceptions about prioritising making the dying person comfortable can be in conflict with doctors' decisions to treat. Whilst carers report a range of strategies adopted in response to bereavement there is a need for continued support for vulnerable carers after the death of the person with HF.

Effects of smoking on nutrition status and response to dietary supplements during acute illness.

BACKGROUND: Although smokers have poor health and consequently poor dietary intake compared with nonsmokers, no study has examined the effects of smoking on nutrition status during acute illness. The purpose of this study is to measure the effect of smoking on nutrition status in hospitalized patients. DESIGN: Four hundred and thirty-four patients in a randomized, double-blind, placebo-controlled trial of nutrition supplementation were nutritionally assessed based on anthropometric, hematological, and biochemical data at baseline and 6 weeks later. Nutrition status was compared between current smokers, ex-smokers, and those who never smoked. Mortality was evaluated during the hospital stay and at 6 and 12 months after hospitalization. The association between smoking and nutrition status and mortality was measured after adjustment for poor prognostic indicators. RESULTS: Body weight, body mass index, mid-upper arm circumference, triceps skinfold thickness, serum albumin level, and plasma concentrations of vitamin C, red-cell folate, and vitamin B12 were all lower in current smokers compared with those who never smoked. Being a current smoker was associated with lower body weight, mid-upper arm circumference, and plasma vitamin C concentration compared with those patients who never smoked. Logistic regression analysis showed that smoking and increasing age were significantly and independently related to 1-year mortality. No significant difference in nutrition status between the supplement and the placebo group was found at the end of 6 weeks. CONCLUSION: Smoking was independently associated with poor nutrition status in hospitalized patients. This may partly explain the poor clinical outcome associated with smoking.

Predicting mortality among a general practice-based sample of older people with heart failure.

OBJECTIVE: To identify factors available to general practitioners (GPs) that are predictive of mortality within a general practice-based population of heart failure patients, and to report the sensitivity and specificity of prognostic information from GPs. METHODS: Five hundred and forty-two heart failure patients aged >60 years were recruited from 16 UK GP surgeries. Patients completed quality-of-life and services use questionnaires every 3 months for 24 months or until death. Factors with independent significant association with survival were identified using Cox proportional hazards regression analysis. RESULTS: Women had a 58% lower risk of death. Patients self-reporting New York Heart Association Classification III or IV had an 81% higher risk of death. Patients aged 85+ years had over a five-fold risk of death as compared with those aged <65 years. Patients with a co-morbidity of cancer had a 78% higher risk of death. Of the 14 patients who died in a 12-month period, the GPs identified 11 (sensitivity 79%). They identified 133 of the 217 who did not die (specificity 61%). DISCUSSION: Predictors readily available to GPs, such as patient characteristics, are easy to adapt to use in general practice, where most heart failure patients are diagnosed and treated. Identifying factors likely to influence death is useful in primary care, as this can initiate discussion about end-of-life care.

Dying trajectories in heart failure.

OBJECTIVES: To explore dying trajectories in heart failure. DESIGN: Prospective, longitudinal study. SETTING: Sixteen GP surgeries in four demographically contrasting areas of the UK. PARTICIPANTS: A total of 27 heart failure patients, >60 years of age, who completed questionnaires for at least five time-points before death. MAIN OUTCOME MEASURES: Kansas City Cardiomyopathy Questionnaire Physical Limitation Scale. RESULTS: No 'typical' dying trajectory could be identified, and only a minority of patients conformed to the theoretical trajectory of dying in heart failure. CONCLUSIONS: This study provides the first prospective data regarding physical decline prior to death in heart failure. Findings challenge current efforts to plan and deliver palliative care services on the basis of the theoretical heart failure dying trajectory.

Malnutrition is an independent predictor of 1-year mortality following acute illness.

Four hundred and forty-five randomly selected hospitalised patients had their nutritional status assessed from anthropometric, haematological and biochemical data. Nutritional status was compared between survivors and non-survivors at baseline, 6 weeks and 6 months. Using Cox's proportional hazard analysis, we measured the association between nutritional assessment variables and 1-year mortality after adjusting for disability, chronic illness, medications, smoking and tissue inflammation. Nutritional status was significantly worse amongst non-survivors compared with survivors, and non-survivors showed marked and significant deterioration in all measures of nutritional status compared with survivors. After adjusting for poor prognostic indicators the hazard ratios of death in the fourth, third and second quarters of both baseline serum albumin and mid-upper arm circumference distributions relative to the first were 0.68, 0.77 and 0.58 (trend P = 0.013) and 0.61, 1.0 and 0.87 (trend P = 0.005) respectively. Intervention studies are needed to determine whether the relationship between malnutrition and the poor outcome highlighted by the present study is causal or a mere association.

Associations between underlying disease and nutritional status following acute illness in older people.

BACKGROUND & AIMS: Undernutrition in hospitalised patients is likely to be contributed to by the dual action of the underlying disease and acute catabolism associated with it. The aim of this study was to measure the association between underlying disease and nutritional status in acutely ill older patients. METHODS: Four hundred and forty-five randomly selected patients had their nutritional status assessed from anthropometric, haematological and biochemical data within 72h of admission, at 6 weeks and at 6 months. Data were also collected on age, disability, chronic illness, medications, smoking and acute-phase response. RESULTS: Patients admitted with chronic obstructive pulmonary disease (COPD), heart failure and falls had significantly lower anthropometric measurements compared with all study populations than for example those admitted with ischaemic heart disease (IHD), chest infections and for elective hip surgery. Nutritional status has deteriorated between admission and 6 weeks among those with COPD, heart failure and falls compared with all study populations. Over 6-months 33 (52%) COPD patients and 14 (39%) heart failure patients were readmitted to hospital compared with 137 (35%) patients of all study populations. Nutritional supplements lead to a limited but significant benefit in transferrin and red cell folate among patients with heart failure and IHD. CONCLUSION: In older patients, underlying diseases have variable contributions to the poor nutritional status associated with acute illness.

Characteristics and views of family carers of older people with heart failure.

AIMS: to explore the characteristics and views of the family carers of older people with heart failure. METHOD: 213 family carers of heart failure patients >60 years were recruited from UK general practitioner (GP) practices. Carer strain, quality of life (QOL) and service satisfaction questionnaires were completed every 3 months for 2 years, as well as 16 interviews with patients and carers, and 9 focus groups with health care professionals. RESULTS: 76% of carers were female, 70% were >60 years and 73% were spousal carers. Predictors of carer strain were symptoms of depression, age and patient NYHA. Predictors of lower QOL were: spousal carer; 2+ health conditions and symptoms of depression. Qualitative findings related to the change in circumstances, impact of responsibilities and health conditions of the family carers. CONCLUSION: carers were mainly older women, often experiencing multiple health conditions. Addressing the practical and emotional support required presents a challenge for specialist palliative care in responding to calls for increased involvement in heart failure. A shared care model with liaison between specialist heart failure nurses, cardiologists, primary care teams and hospice services is advocated.

Effects of acute-phase response on nutritional status and clinical outcome of hospitalized patients.

OBJECTIVE: We measured the effects of acute-phase response on nutritional status and clinical outcome in hospitalized older patients. METHODS: Four hundred forty-five patients who took part in a randomized, double-blind, placebo-controlled trial of nutritional supplementation had their nutritional status assessed from anthropometric, hematologic, and biochemical data at baseline, 6 wk, and 6 mo. Outcome measures including disability, length of stay, and 1-y mortality were recorded. C-reactive protein (CRP) concentration, a marker of acute-phase response, was also measured. Multivariate analysis was used to measure the association between acute-phase response and nutritional assessment variables after adjusting for age, disability, chronic illness, medications, and smoking. RESULTS: Energy intake in the hospital was significantly lower among patients with higher CRP concentrations. Serum albumin, transferrin, plasma ascorbic acid, and hemoglobin concentrations were significantly lower and serum ferritin higher in patients with acute-phase response (CRP > 10 mg/L) than in patients without acute-phase response (CRP < or = 10 mg/L; P < 0.001). Nutritional status deteriorated among patients with acute-phase response in contrast to the improvement seen in patients without acute-phase response. After adjusting for age, disability, and comorbidity in a multivariate analysis, acute-phase response had a significant and independent effect on nutritional status and clinical outcome. The benefit of nutritional support was mainly confined to patients with acute-phase response. CONCLUSION: Acute-phase response is associated with poor nutritional status and poor clinical outcome in older patients. Whether nutritional support removes or mitigates the hazard of poor outcome associated with acute-phase response needs to be determined.

Antioxidant supplementation with or without B-group vitamins after acute ischemic stroke: a randomized controlled trial.

BACKGROUND: Evidence shows that there is a rapid increase in the production of markers of oxidative damage immediately after acute ischemic stroke and that endogenous antioxidant defenses are rapidly depleted, thus permitting further tissue damage. Several studies point to an antioxidant effect of B-group vitamins and a pro-oxidant effect of elevated total plasma homocysteine (tHcy). METHODS: To test whether supplementary antioxidants with or without B-group vitamins during this critical period enhance antioxidant capacity or mitigate oxidative damage, ninety-six acute ischemic stroke patients within 12 hours of symptom onset were randomly assigned to receive either daily oral 800 IU (727 mg) vitamin E and 500 mg vitamin C (n = 24), or B-group vitamins (5 mg folic acid, 5 mg vitamin B(2), 50 mg vitamin B(6), and 0.4 mg of vitamin B(12); n = 24), both vitamins together (n = 24), or no supplementation (n = 24) for 14 days. Treatment groups and controls were matched for stroke subtype and age. Blood was obtained before treatment, at day 7, and day 14 for measurements of plasma or blood vitamin status, plasma total antioxidant capacity (TAOC), malondialdehyde (MDA), tHcy and C-reactive protein (CRP). RESULTS: Supplementation with antioxidant vitamins and B-group vitamins separately or together significantly increased the plasma concentration of vitamin C, E, pyridoxal phosphate (B(6) status), red blood cell folate, and improved a measure of B(2) status (red cell glutathione reductase activation coefficient [EGRAC]), compared with the control group. Plasma TAOC increased significantly in the antioxidant treatment groups compared with the nonsignificant decline seen in the control group. tHcy concentrations decreased in subjects who received B-group vitamins and the control group compared with the rise seen in those who received antioxidants alone. There was a significant reduction in plasma MDA concentration in the 3 treatment groups, in contrast to the increase seen in the control group; however, the changes were most evident in antioxidant groups. CRP concentrations (a marker of tissue inflammation) were significantly lower in the 3 treatment groups compared with the control group. There were no additive or synergistic effects of antioxidants and B-group vitamins together on any outcome measure. CONCLUSIONS: Antioxidants supplementation with or without B-group vitamins enhances antioxidant capacity, mitigates oxidative damage, and may have an anti-inflammatory effect immediately postinfarct in stroke disease.

Age as a determinant of nutritional status: a cross sectional study.

BACKGROUND: Undenutrition is known to be prevalent and largely unrecognised in older patients; however, aberrations in indicators of nutritional status may simply reflect effects of age and/or functional disability. OBJECTIVE: The aim of this study was to measure the effect, if any of age on nutritional status in older patients. DESIGN: 445 randomly selected hospitalised patients consented to nutritional status assessment derived from anthropometric, haematological, and biochemical data within 72 hours of admission. Nutritional status was compared between those age < 75 years and those aged 75 years or more. Using multiple regression models, we measured the association between age and nutritional assessment variables after adjusting for disability, chronic illness, medications, smoking and tissue inflammation. RESULTS: Body weight, body mass index, mid-upper arm circumference, haemoglobin, serum albumin and plasma ascorbic acid were all significantly lower in people aged > or = 75 years compared with those < 75 years of age. Although riboflavin (vitamin B2), 25OH VitD3, red-cell folate and vitamin B12 concentrations were lower in those aged > or = 75 years, differences were not statistically significant. After adjusting for disability and co-morbidity in a multivariate analysis, age alone had a significant and independent effect on important anthropometric and biochemical nutritional assessment variables. CONCLUSION: Increasing age is independently associated with poor nutritional status. This may partly explain the poor clinical outcome in older patients.