Assessment of protein energy malnutrition in older persons, part I: History, examination, body composition, and screening tools

Beneficial effects of a low-protein diet on host resistance to Paracoccidioides brasiliensis in mice

OBJECTIVE

Although protein malnutrition impairs immune functions, several studies have recently shown that protein restriction without malnutrition is beneficial to host defenses against invading pathogens and cancer. In an effort to establish the optimum diet for host resistance, we investigated the effect of different dietary protein levels on host resistance to Paracoccidioides brasiliensis.

METHODS

Mice were fasted for 2 days and then infected with P. brasiliensis. Immediately after challenge with this fungus, mice were refed on diets with three different levels (0%, 1.5%, or 20%) of casein. On days 0-7 after infection, antifungal activity and levels of proinflammatory mediators in the spleen and liver were measured.

RESULTS

Mice refed on the 1.5% casein diet showed higher antifungal activity in the spleen and liver compared with mice on the 20% casein diet. The antifungal activity in the spleens of mice refed on the 0% casein diet was intermediate between the antifungal activities of those refed the 1.5% and 20% casein diets. After infection, increases in spleen and liver levels of interleukin-6 and interferon-gamma, liver mRNA levels of antimicrobial proteins (myeloperoxidase, cathepsin-G, and elastase-2), and liver mRNA levels of proinflammatory mediators (interleukin-18, chemokine C-X-C motif ligand 10, nuclear factor-kappaB, inducible nitric oxide synthase, and granulocyte-macrophage colony-stimulating factor) were less profound in mice on the 1.5% or 0% casein diet compared with mice refed the 20% casein diet.

CONCLUSION

The present results suggest that protein restriction without malnutrition could be beneficial to host resistance to P. brasiliensis.

Nutritional assessment interpretation on 22 007 Spanish community-dwelling elders through the Mini Nutritional Assessment test

Objectives

To evaluate the prevalence of undernutrition among community-dwelling elderly people in Spain using the Mini Nutritional Assessment (MNA) and to analyse its distribution according to age, gender and residence region.

Design

Cross-sectional study assessing the nutritional status of elderly persons through both the short form and the full version of the MNA test.

Setting

Pharmacy offices across the whole country (Spain) were enrolled to recruit participants.

Subjects

A total of 22 007 participants (8014 men and 13 993 women), aged ≥65 years, assessed during the last two months of 2005.

Results

According to MNA screening, 4·3 % subjects were classified as undernourished (MNA score <17) and 25·4 % were at risk of undernutrition (MNA score ≥17 to ≤23·5). The MNA short form correlated strongly with the full MNA version (r = 0·85). MNA total score was significantly higher in men than in women (25·4 (sd 3·7) v. 24·6 (sd 3·9); P < 0·001) and lower in the oldest than in the youngest subjects (P < 0·001) in both genders. According to regional distribution, the best nutritional status was found in elderly from the north of Spain excluding the north-west area.

Conclusions

Female gender, older age and living in the south half or north-west of the country were associated with higher rates of undernutrition among community-dwelling elderly persons in Spain.

The Geriatric Nutritional Risk Index

PURPOSE OF REVIEW

A new nutrition-related risk assessment tool, the Geriatric Nutritional Risk Index (GNRI), has been recently proposed. The aim of this review is to summarize current evidences on the use of this tool with particular focus on the rationales of its application in elderly healthcare.

RECENT FINDINGS

Structured as a dichotomous index, based on serum albumin values and the discrepancy between real and ideal weight, the GNRI seems to account for both acute and chronic reasons of nutrition-related complications. It allows us to face the frequent difficulties in obtaining a profitable participation of the old patient to nutritional assessment. Its application appears feasible in all healthcare settings in which it shows adequacy to discriminate different profiles of nutritional risk. A GNRI less than 92 might be suggested as clinical trigger for routine nutritional support.

SUMMARY

In maths of nutrition 'recognize and treat' has become a clinical imperative. Actually, clinical judgement by an expert is still considered the reference standard to diagnose malnutrition but the use of simplified tools profitably assists in nutritional risk screening process. The GNRI is easy to use and preliminary results show that it is promising. Its routine application, next to the other validated tools already available, might be enforced in the assessment of the old patient.

Mini Nutritional Assessment (short form) and functional decline in older patients admitted to an acute medical ward

BACKGROUND AND AIMS

Protein and/or energy malnutrition is common in hospitalized older patients and is associated with poor outcomes. Among recommended nutritional screening tools, contrasting data exist about the usefulness of the Mini Nutritional Assessment Short-Form (MNA-SF). We evaluated whether the MNA-SF, alone or integrated with serum albumin levels, is a reliable predictor of functional decline in older patients.

METHODS

We studied 275 elderly patients (mean age 76.5, 60.7% males) admitted to an acute medical ward of a tertiary-care teaching hospital over a 12-month period. In this observational study, we evaluated nutritional status, with the MNA-SF alone or integrated with albumin. Data were collected at admission and related to laboratory and geriatric assessment features, and length of stay (LOS). Functional decline (defined as a loss >or=10% in terms of Barthel Index score at discharge compared with 2 weeks before admission) was considered as outcome.

RESULTS

The MNA-SF estimated 46% patients at risk of malnutrition. These subjects had worse clinical features (lower total cholesterol and albumin levels), longer LOS (13.3 vs 11.2 days, p=0.014) and considerable functional decline (OR 4.25, 95% CI 1.83-9.9, p=0.001). Integrating the MNA-SF with albumin values, we obtained an effective instrument to detect older inpatients with protein-energy malnutrition, at higher risk of undergoing functional decline (OR 16.19, 95% CI 4.68-56.03, p<0.0001).

CONCLUSIONS

The MNA-SF is a useful screening tool for hospitalized elders at risk of malnutrition. It is associated with poor clinical outcomes and is able to predict functional decline. Together with hypoalbuminemia, it better identifies patients with true protein-energy malnutrition.

Dietary intervention in older adults with early-stage Alzheimer dementia: early lessons learned

In older adults, an adequate diet depends on their ability to procure and prepare food and eat independently or the availability of dietary assistance when needed. Inadequate food intake or increased nutritional requirements lead to poor nutritional status, which is considered a key determinant of morbidity, increased risk of infection, and mortality in elderly individuals. Weight loss among seniors also heralds increased morbidity and mortality. Dietary behaviour disorders affecting food consumption, nutrition status and maintenance of body weight are common in older adults, and have a substantial impact on nutritional status and quality of life among older adults with Alzheimer Dementia (AD). The Nutrition Intervention Study (NIS) is ongoing. It employs a quasi-experimental pre-post intervention design in physically-well, community-dwelling early stage AD patients aged 70 y or older. To date, 34 intervention group patients and 25 control group participants have been recruited with their primary caregivers (CG) from 6 hospital-based memory and geriatric clinics in Montreal. The NIS uses clinical dietetics principles to develop and offer tailored dietary strategies to patients and their CG. This paper reports on the application of dietary intervention strategies in two intervention group participants; one was deemed successful while the other was considered unsuccessful. The report documents challenges encountered in assessing and counselling this clientele, and seeks to explain the outcome of intervention in these patients.

Depressive symptoms and risk for malnutrition among hospitalized elderly people

OBJECTIVES

To explore the association between depressive symptoms and risk for malnutrition in hospitalized elderly people.

METHODS

195 hospitalized medical patients older than 65 years of age were studied in a cross-sectional design. Depression was assessed by 30-item Geriatric Depression Scale (GDS), nutritional status was evaluated by the Mini-Nutritional Assessment (MNA). Eating and digestive problems were assessed using selected items of Nutrition Risk Index (NRI), cognitive and functional status by Folstein and Barthel indices respectively; demographic data, diagnoses and medications were obtained from medical records.

RESULTS

The prevalence of depression in the studied population was 28%. MNA scores were significantly lower among depressed patients as compared with non-depressed (22.86 vs. 24.96, p < 0.001), indicating a higher risk for undernutrition among depressed persons. After controlling for age, cognitive status, functional ability, and number of illnesses, undernutrition was significantly associated with depression (OR = 2.23; 95% CI: 1.04-4.8).

CONCLUSIONS

Nutritional risk is associated with depression in aged inpatients. Close case management of the elderly hospitalized patients that include assessment and treatment for both disorders may be beneficial.

Issues in Recruitment, Retention, and Data Collection in a Longitudinal Nutrition Study of Community-Dwelling Older Adults With Early-Stage Alzheimer's Dementia

The Nutrition-Memory Study (NMS) followed evolution of nutrition status among elderly community-dwelling individuals with Alzheimer's disease (AD). Participants, age-matched to cognitively intact controls, were recruited from three university hospital memory clinics. Incentives encouraged retention; flexible procedures and caregiver collaboration permitted collection of nutrition information from AD patients. Of 71 patients referred by the clinics, 55 (77.5%) were eligible, 42 (76.4% of eligible) were recruited with their caregivers, and 40 (72.7%) completed the baseline. Thirty-two patient—caregiver dyads completed the first three interviews (58.1% of eligible; 80% of recruited); 26 of the 32 dyads (81.3% of recruited) completed four of the five interviews, and 14 (43.8% of recruited) were seen at all five study visits. Ensuring successful recruitment and retention in this clientele requires strong links between the research team and target community, ensuring relevance of the study to participants, and being mindful of the burden levied on patient—caregiver dyads.

Use of the mini nutritional assessment tool in elderly people from long-term institutions of southeast of Brazil

BACKGROUND

the Mini Nutritional Assessment (MNA) is a multidimensional method of nutritional evaluation that allows the diagnosis of malnutrition and risk of malnutrition in elderly people, it is important to mention that this method has not been well studied in Brazil.

OBJECTIVE

to verify the use of the MNA in elderly people that has been living in long term institutions for elderly people.

DESIGN

transversal study.

PARTICIPANTS

89 people (>/= 60 years), being 64.0% men. The average of age for both genders was 73.7 +/- 9.1 years old, being 72.8 +/- 8.9 years old for men, and 75.3 +/- 9.3 years old for women.

SETTING

long-term institutions for elderly people located in the Southeast of Brazil.

METHODS

it was calculated the sensibility, specificity, and positive and negative predictive values. It was data to set up a ROC curve to verify the accuracy of the MNA. The variable used as a "standard" for the nutritional diagnosis of the elderly people was the corrected arm muscle area because it is able to provide information or an estimative of the muscle reserve of a person being considered a good indicator of malnutrition in elderly people.

RESULTS

the sensibility was 84.0%, the specificity was 36.0%, the positive predictive value was 77.0%, and the negative predictive value was 47.0%; the area of the ROC curve was 0.71 (71.0%).

CONCLUSION

the MNA method has showed accuracy, and sensibility when dealing with the diagnosis of malnutrition and risk of malnutrition in institutionalized elderly groups of the Southeastern region of Brazil, however, it presented a low specificity.

The two-step Mini Nutritional Assessment procedure in community resident homes

AIMS AND OBJECTIVITIES: The aims were to test internal consistency and interrater reliability of Mini Nutritional Assessment during implementation of Mini Nutritional Assessment in community residential homes and to test sensitivity, specificity and diagnostic predictivity of Mini Nutritional Assessment-short form vs. Mini Nutritional Assessment.

BACKGROUND

There is a need in clinical practice to assess nutritional status in older people and to identify those who could benefit from early intervention.

METHODS

The two-step Mini Nutritional Assessment procedure (Mini Nutritional Assessment-short form and Mini Nutritional Assessment) was used in 127 older people admitted to eight residential homes. In three of those homes (A, B and C), registered nurses simultaneously performed the assessment procedure, after receiving education and training. The intention was to offer the registered nurses a tool for independent practice use.

RESULTS

Internal consistency was 0.68 (Cronbach's alpha) (n = 127). In residential home A, B and C, the registered nurses carried out Mini Nutritional Assessment in 45 residents out of 68. The agreement level between the author's and the registered nurses' assessments was 62% (kappa 0.41). In residential home A, B and C, the agreement level was 89%, 89% and 44%, respectively. Sensitivity, specificity and diagnostic predictivity of Mini Nutritional Assessment-short form vs. Mini Nutritional Assessment were 89%, 82% and 92%, respectively.

CONCLUSIONS

The two-step Mini Nutritional Assessment procedure seems to be a useful tool to identify residents in need of nutritional interventions, despite the registered nurses not carrying out Mini Nutritional Assessment in all residents and the low agreement in residential home C. It indicates that to implement and use Mini Nutritional Assessment in nursing care demands the creating necessary staff resources, such as adequate staffing, sufficient education and continual supervision.

RELEVANCE TO CLINICAL PRACTICE

Because of the high sensitivity of Mini Nutritional Assessment-short form and Mini Nutritional Assessment, Mini Nutritional Assessment-short form alone might be sufficient for practice use, as its simplicity might increase its usefulness.

Nutritional screening and perceived health in a group of geriatric rehabilitation patients

AIMS AND OBJECTIVES

(i) To perform a nutritional screening using the Nutritional Form For the Elderly and relate the results to perceived health in a group of geriatric rehabilitation patients; and (ii) to compare the screening results and nurses' nutritional notes in the nursing documentation.

BACKGROUND

Undernutrition is an under-recognized problem among older patients. Using a screening instrument is a way to detect patients at risk for undernutrition.

DESIGN

A cross-sectional study conducted in Sweden.

METHODS

A sample of 147 geriatric rehabilitation patients was consecutively included and was interviewed with the screening instrument, questions about background variables, perceived health and health-related issues. Higher screening scores indicate higher risk for undernutrition. Parametric and nonparametric statistical tests were used. When nurses' nutritional notes in the nursing documentation were corresponding to the content in any of the response alternatives for each screening item, the notes were marked as existent.

RESULTS

The screening results showed that 55% of the patients were at medium risk and 14% at high risk for undernutrition. Patients in perceived ill health had higher screening scores than those in perceived good health. Associations were also found between receiving help, perceiving helplessness, not being active and not feeling satisfied and higher screening scores. The content of nine of 15 items in the instrument was mentioned in a number of nursing records.

CONCLUSIONS

The prevalence of older patients at medium or high risk for undernutrition was high. To be at high risk for undernutrition was associated with perceived ill health. Nurses' nutritional notes in the nursing documentation showed deficiencies, indicating that all patients at medium or high risk for undernutrition were not identified.

RELEVANCE TO CLINICAL PRACTICE

The results suggest that nurses need a screening instrument to highlight older nutritional at-risk patients in need of further awareness and investigation.

Predictors of nutritional risk in community-dwelling seniors

OBJECTIVES

At any age, good nutrition is important for maintaining good health. Seniors are at risk of declining nutritional status due to the physiological, psychological, economic and social changes that accompany aging. We investigated medical, psychological, social and environmental characteristics as both correlates and predictors of elevated nutritional risk in community-dwelling seniors.

METHODS

Data came from a prospective study of 839 seniors aged 75 and over, in Montreal. Face-to-face interviews were conducted at baseline and at 12 months. The validated Elderly Nutrition Screening (ENS) tool was administered and subjects were assigned a level of "nutritional risk" based on the risk for energy and nutritional intake deficiencies. Using risk factors identified in the literature, analyses were performed to characterize those factors associated with both the level of risk at baseline and a change in risk over 12 months.

RESULTS

At baseline, more than half (60%) of the participants were at elevated nutritional risk. Cross-sectional analyses supported the findings of previous research examining correlates of elevated nutritional risk. Longitudinal results showed that among those at low nutritional risk, only poor self-rated health was found to be a statistically significant predictor of elevated risk at 12 months (OR = 3.30, p < 0.05).

CONCLUSION

Proper nutrition can promote healthy aging by preventing disease and disability, improving health outcomes and maintaining autonomy, resulting in decreased health care utilization and costs. The findings of this research highlight the need for longitudinal studies in order to better understand and target nutritional risk in community-dwelling seniors.

Nutritional situation of elderly nursing home residents

Malnutrition in institutionalized elderly is of individual and public concern since it negatively affects health outcome and quality of life and is often preventable. Over the past years several studies have examined the prevalence of malnutrition in institutionalized elderly and reported greatly diverse results. The purpose of the present literature review is to give an overview of the current knowledge about the nutritional situation of institutionalized elderly having specific regard to the prevalence of protein-energy malnutrition and nutrition-related problems. Based on a literature search and additional articles from the files of the authors, observational studies with relatively unselected populations reporting figures for the prevalence of malnutrition and/or the prevalence of nutrition-related problems (e. g. poor appetite, chewing or swallowing problems, eating dependency or poor intake) and published between 1990 and 2006 were considered. Relevant information was extracted and compiled. A total of 42 eligible studies with 41 to 6832 participants were found. BMI was the most frequently used parameter for nutritional assessment with mean values mostly between 21 and 24 kg/m(2). Eight studies applied a cut-off value of 20 kg/m(2) and reported between 10% and 50% low values. Weight loss was reported in 7 studies with prevalence rates between 5 and 41%, reduced serum albumin (< 35 g/L) in 10 studies with prevalence rates between 0 and 50%. According to the MNA (12 studies) malnutrition was observed in 2 to 38% and a risk of malnutrition in 37 to 62%. Nutritional problems were reported in 17 studies, again with great variability between the studies. In physically and mentally capable study populations malnutrition was relatively unfrequent. Prevalence rates were highest in studies with great proportions of disabled and severely impaired residents. It can be concluded that malnutrition is generally widespread in institutionalized elderly. Prevalence rates vary according to the parameters and cut-off values used for nutritional assessment and according to the population under study. Future studies should carefully characterize their participants and use standardized nutritional assessment tools in order to achieve better comparability of study results as up to now.

[Nutrition alterations in internal medicine. Body composition analysis with bioelectrical impedance]

OBJECTIVES

To determine the prevalence of malnutrition in patients in Internal Medicine. To describe the changes of corporal composition depending on body mass index (BMI). To evaluate validity of the different screening tools for the estimation of body composition.

MATERIAL AND METHODS

Prospective observational cross-sectional study of the prevalence of malnutrition in 300 patients (sample 1); these were chosen 136 patients (sample 2), classifying in four groups: BMI < 20: 30 patients; BMI = 20-25: 46 patients; BMI = 25-30: 30 patients, and BMI > 30: 30 patients. In the patients of sample 2, we carried out a protocol of nutritional evaluation with anthropometry, laboratory and bioelectrical impedance analysis.

RESULTS

The prevalence of desnutrition was 9.3% and the obesity was 22.3%. In undernourished patients, the measure of body compartments with bioelectrical impedance, expressed in percentage of body weight, were: fat mass 20.5%, fat-free mass 79.4% and total body mater 58.3%. The body composition in obeses was: fat mass 40.1%, fat-free mass 60.6% and total body water 44.3%. The patients with normal BMI, the meta index (impedance at 50 kHz/BMI) was 25.9 +/- 5.21; in undernourished the index was higher (36.7) and obeses lower (15.5). The meta index (30-20) estimates desnutrition-obesity with high sensibility and specificity. The prevalence of desnutrition varies from 6% to 69% and obesity from 23% to 74%, using different methods and criterions for the estimation of body composition.

CONCLUSIONS

In Internal Medicine, the overweight (BMI > 25) is the most prevalent nutritional alteration. The bioelectrical impedance analysis helps for estimation of body composition and meta index is a very useful indicator of malnutrition (desnutrition-obesity).

Effect of Lactobacillus johnsonii La1 on immune function and serum albumin in aged and malnourished aged mice

OBJECTIVE

Protein-energy malnutrition (PEM) is a serious nutritional problem that causes immune dysfunction in elderly people. Probiotic lactic acid bacteria may potentially modify immunity; however, there is little evidence to elucidate the influence of these bacteria on PEM in the elderly.

METHODS

The immune modulation effects of lactic acid bacterium Lactobacillus johnsonii La1 (La1) were examined in aged mice and aged mice with PEM. Twenty-month-old male 57BL6/n mice (n = 28) were divided into four groups and received the following diet for 14 d: a complete diet (20% protein) without Lal (control) or with Lal or a low-protein diet (5% protein) to induce PEM, with or without La1. All mice were immunized with diphtheria toxin (DT) with alfacalciferol at 7 d and sacrificed 14 d after starting the experimental diets.

RESULTS

Serum albumin concentrations and body weight, both of which were reduced by the low-protein diet, were ameliorated by La1 intake and were the same as in mice receiving the control diet. Anti-DT immunoglobulin (Ig) A in fecal extract was increased by La1 intake in mice receiving the complete and low-protein diets. Serum anti-DT IgA, IgG, splenocyte proliferation, and CD8(+) T cells were reduced by the low-protein diet and restored by La1 intake.

CONCLUSION

La1 enhances intestinal IgA production and helps recover nutritional status and systemic immune responses in aged mice with PEM. It is possible that La1 may contribute to immune system recovery in immunocompromised hosts such as elderly humans with PEM.

Feasible Use of Estimated Height for Predicting Outcome by the Geriatric Nutritional Risk Index in Long-Term Care Resident Elderly

BACKGROUND

The Geriatric Nutritional Risk Index (GNRI) is a new index recently introduced for predicting risk of nutritional-related complications in elderly patients. It combines albumin with information about body weight: GNRI = (1.489 x albumin, g/l) + (41.7 x present/ideal body weight), with ideal weight calculated according to the Lorentz formula. Because standing height (SH) is frequently difficult to obtain in older people, in Lorentz equations this parameter has been replaced by estimated height (EH) from knee height. Though, if EH is well accepted as a valid surrogate for SH, the same might not be expected for its use in ideal body weight calculation, with possible consequences in grading nutritional risk correctly.

OBJECTIVE

The aim of this study was to investigate whether the use of SH rather than EH for the calculation of ideal body weight predicts similar outcomes by GNRI.

METHODS

Body weight, SH and EH were obtained in 231 long-term care resident elderly (88 males and 143 females, mean age +/- SD 80.0 +/- 8.4, range 65-97 years). Blood samples were assessed for albumin concentration. Ideal body weight was derived from the Lorentz formula using both SH and EH. According to both ideal weight estimates, nutritional risk was defined by the GNRI score.

RESULTS

The Pearson correlation coefficients were high for both EH (with SH; r = 0.90) and estimates of ideal body weight (r = 0.90) and all were highly significant (p < 0.0001). A statistically significant difference was found between SH and EH (p = 0.0265). Similar and expectable differences in significance have also been observed between ideal body weights (p = 0.0271). However, an accordance of 95.2% has been detected (Kendall's tau test: tau = 0.85, p < 0.0001) in grading nutritional risk by GNRI.

CONCLUSION

The use of EH for ideal body weight calculation and nutritional risk assessment by GNRI is feasible. Thus, GNRI seems to have been designed in the best way and its use is really attractive, particularly when considering the low-grade participation demanded of the patient in the assessment. This simple and valid assessment tool should be taken into greater consideration.

The new Geriatric Nutritional Risk Index is a good predictor of muscle dysfunction in institutionalized older patients

BACKGROUND & AIMS

The validity of Geriatric Nutritional Risk Index (GNRI), in predicting nutrition-related risk of complications in the elderly, has been recently underscored. Malnutrition may results also in muscle function impairment. Thus, the present study aims to investigate if GNRI might be a reliable detector of muscle dysfunction in institutionalized older people.

METHODS

In total, 153 institutionalized elderly (71 males, 82 females; mean age+/-SD: 75.2+/-8.4; range: 65-96) were studied in anthropometric parameters, serum albumin concentration and total score on GNRI. Muscle function was assessed by handgrip strength (HG).

RESULTS

Women were significantly older than men and presented lower values of HG and arm muscle area (AMA). In overall population, GNRI was significantly correlated with AMA, HG and strength for centimeter of muscle area (HG/AMA); however, in gender-separated analysis, men presented higher degrees of correlation. After dividing patients in four categories according to GNRI, a more significant difference was detected in HG and HG/AMA rather than the other clinical and anthropometric parameters. Moreover, ANOVA analysis between HG quartiles was highly significant for GNRI, AMA and HG/AMA.

CONCLUSIONS

GNRI is a good predictor of muscle dysfunction, particularly in men, and useful in identifying patients suitable for nutritional support and physical activity.

Undernutrition Risk Screening and Length of Stay of Hospitalized Elderly

The purpose was to compare, in elderly hospitalized patients, the performance of widely used nutritional screening and assessment tools and anthropometric parameters with the Nutritional Risk Screening (NRS-2002); and to evaluate their independent association with length of hospital stay. Nutritional-status screening and assessment was carried out using NRS-2002, Mini Nutritional Assessment (MNA), Subjective Global Assessment (SGA), Malnutrition Screening Tool (MST), and anthropometry. Patients classified by NRS-2002 as undernourished had an independent higher risk of longer length-of-stay (> 8 days): Odds ratio = 2.25 (95% Confidence Interval = 1.03 to 4.88). Nutritional "risk" by NRS-2002 is an independent risk factor for a long length of stay in elderly hospitalized patients, an important outcome predictor in this population.

Mini Nutritional Assessment of rural elderly people in Bangladesh: the impact of demographic, socio-economic and health factors

Objective

In stating the Millennium Development Goals, the United Nations aims to halve malnutrition around the world by 2015. Nutritional status of the elderly population in low-income countries is seldom focused upon. The present study aimed to evaluate the magnitude of malnutrition among an elderly population in rural Bangladesh.

Design and setting

Data collection for a multidimensional cross-sectional study of community-based elderly people aged 60 years and over was conducted in a rural area in Bangladesh.

Subjects

Of 850 randomly selected elderly individuals, 625 participated in home interviews. Complete nutritional information was available for 457 individuals (mean age 69 ± 8 years, 55% female). Nutritional status was assessed using an adapted form of the Mini Nutritional Assessment (MNA) including body mass index (BMI). Age, sex, education, household expenditure on food and self-reported health problems were investigated as potential predictors of nutritional status.

Results

BMI < 18.5 kg m− 2, indicating chronic energy deficiency, was found in 50% of the population. MNA revealed a prevalence of 26% for protein–energy malnutrition and 62% for risk of malnutrition. Health problems rather than age had a negative impact on nutritional status. Level of education and food expenditure were directly associated with nutritional status.

Conclusion

In order to reduce world hunger by half in the coming decade, it is important to recognise that a substantial proportion of the elderly population, particularly in low-income countries, is undernourished.

Prevalence of undernutrition in elderly patients hospitalized in a geriatric unit in Belo Horizonte, MG, Brazil

OBJECTIVES

We evaluated, from anthropometric and biochemical indicators, the prevalence of undernutrition within an elderly population hospitalized in Belo Horizonte, Minas Gerais, Brazil, and identified social demographic, clinical and biochemical factors associated with undernutrition.

METHODS

A transverse sectional study involving 197 elderly patients was conducted. Anthropometric data were obtained from subjects directly or indirectly; clinical characteristics, including health problems, functional and cognitive abilities, and use of medication, were gathered from medical records; social demographic information was acquired by interviewing the subject or carer. Logistic regression analysis was employed to identify factors associated with undernutrition.

RESULTS

According to the body mass index cutoff points recommended by the World Health Organization, 29.7% of subjects were classified as undernourished and 43.8% as eutrophic. Application of the Nutrition Screening Initiative system gave rise to an inverse situation in which 54.7% of subjects were considered undernourished and only 29.2% were eutrophic. Statistical analysis of the studied variables showed that calf circumference < or =31 cm was significantly associated with undernutrition (P < 0.0001) irrespective of the classification system employed, and may thus be considered a strong marker for undernutrition. In contrast, total serum cholesterol level > or =4.14 mmol/L was identified as a protective factor against undernutrition (P = 0.01).

CONCLUSION

The prevalence of undernutrition among the hospitalized elderly in Brazil is very high. The measurement of calf circumference is a non-invasive and economical approach that can facilitate evaluation of the nutritional status of elderly individuals.

Obesity in older adults: a systematic review of the evidence for diagnosis and treatment

OBJECTIVE

Although obesity is increasing in older U.S. adults, treatment is controversial in this age group. We sought to examine evidence concerning obesity's health-related risks, diagnostic methods, and treatment outcomes in older individuals.

RESEARCH METHODS AND PROCEDURES

We searched MEDLINE and Cochrane Library databases, consulted with experts, and examined bibliographies for English language studies discussing obesity in older adults (mean age > or = 60), published between January 1980 and November 2005. Inclusion criteria were met by 32 longitudinal analyses, seven diagnostic studies, and 17 randomized controlled trial articles. At least two authors independently reviewed and abstracted study design, population, results, and quality information.

RESULTS

Correlations between body fat and three anthropometric measures (BMI, waist circumference, waist-to-hip ratio) decrease with age but remain clinically significant. Obesity contributes to risk for several cardiovascular endpoints, some cancers, and impaired mobility but protects against hip fracture. The association between obesity and mortality declines as age increases. Intensive counseling strategies incorporating behavioral, dietary, and exercise components promote a weight loss of 3 to 4 kg over 1 to 3.3 years. The loss is linked with improved glucose tolerance, improved physical functioning, reduced incidence of diabetes and a combined hypertension and cardiovascular endpoint, and reduced bone density.

DISCUSSION

In older adults, obesity can be diagnosed with standard clinical measures. Intensive counseling can promote modest sustained weight loss, but data are insufficient to evaluate surgical or pharmacological options. Obesity treatment is most likely to benefit individuals with high cardiovascular risk. Limited data suggest possible functional improvement. Treatment should incorporate measures to avoid bone loss.

Gender differences in factors associated with nutritional status of older medical patients

OBJECTIVES

To evaluate gender differences in nutritional risk of older people admitted to an acute-care general medical department, and identify gender-specific risk factors.

DESIGN

Cross-sectional study.

SETTING

Internal Medicine Department in an acute care, university-affiliated hospital in southern Israel.

SUBJECTS

204 cognitively intact patients aged 65 and over, admitted during a 12-month period to a general medical department.

MEASURES OF OUTCOME

Evaluation included demographic and clinical data consisting of the sum of medical conditions and of prescribed medications, evaluation of nutritional status, cognitive status, depression assessment and functional ability. Statistical analyses were conducted to evaluate the gender specific risk factors for under-nutrition.

RESULTS

32.5% of the men and 48.1% of the women admitted to an internal medicine department were at risk for under-nutrition. Those at nutritional risk had a higher rate of depression, lower cognitive and physical ability, poorer reported health status and more diagnosed diseases. Nutritional risk for men was associated with higher depression score, longer hospitalization, and poor appetite. For women, nutritional risk was associated with lower functional status and more diagnosed diseases. In a multivariate analysis, being a female increased the risk of under-nutrition by 3.3 fold.

CONCLUSION

Risk of under-nutrition is prevalent among older in-patients and is gender-related. Female inpatients are at markedly increased risk for under-nutrition. The mechanism of the gender discrepancy in factors related to nutritional deterioration is complex and poorly understood.

Évaluation quasi-expérimentale d’une intervention d’éducation nutritionnelle auprès des aides à domicile de personnes âgées

BACKGROUND

The French National Program on Nutrition and Health has defined two specific objectives targeting older persons: (i) to improve their status in calcium and vitamin D and (ii) to prevent undernutrition. Home help provides support in activities of daily living, including meals, to dependent persons. The objective of our study was to evaluate the impact of a nutritional education intervention on knowledge and practices among home support assistants for the elderly.

METHODS

Three facilities providing home support in Gironde (France) selected 132 home support assistants to follow an education program and 134 controls. Nutrition training was conducted in the intervention group by a dietician during two half-day sessions in May-June 2004. A non randomized controlled trial design was used for evaluation. Nutritional knowledge (20 questions) and practice (5 questions) of home support assistants were assessed by questionnaire before (April 2004) and after (September 2004) the training period in each group. Satisfaction of the intervention group was also assessed.

RESULTS

The intervention group included 101 participants and the control group 106 persons who answered both questionnaires before and after the education program. The intervention group was significantly younger (p < 0.05), less educated (p = 0.01) and had less often participated to previous nutrition training (p < 0.001) than the control group. There was no significant difference between the two groups before intervention for their mean scores of knowledge or practices. The intervention group significantly improved its knowledge score (mean gain 2.5 points, p < 0.001) after the training period, whereas the score remained unchanged in the control group (mean gain 0.5 points, p = 0.06). The impact of the nutritional education was very significant (p < 0.0001) after adjustment for the characteristics which differed between the two groups. The practice scores did not differ significantly after intervention in multivariate analyses. Satisfaction of trained home support assistants was very high.

CONCLUSION

An education program of home support assistants for elderly persons can improve their nutritional knowledge, but this study cannot conclude that the intervention was efficient to improve the nutritional status of older persons.

Why are elderly individuals at risk of nutritional deficiency?

The older population is the single largest demographic group at disproportionate risk of inadequate diet and malnutrition. Ageing is associated with a decline in a number of physiological functions that can impact nutritional status, including reduced lean body mass and a resultant decrease in basal metabolic rate, decreased gastric secretion of digestive juices and changes in the oral cavity, sensory function deficits, changes in fluid and electrolyte regulation and chronic illness. Medication, hospitalization and other social determinants also can contribute to nutritional inadequacy. The nutritional status of older people is an important determinant of quality of life, morbidity and mortality. This review critically examines the factors that contribute to the development of poor nutritional status in older people and considers the consequences of malnutrition.

Nutritional screening and assessment tools for older adults: literature review

AIM

This paper reports a literature review to examine the range of published tools available for use by nurses to screen or assess nutritional status of older adults, and the extent to which validity, reliability, sensitivity, specificity and acceptability of the tools has been addressed.

BACKGROUND

The incidence of malnutrition in older adults is high. One method by which malnutrition or risk of malnutrition can be detected is by the use of nutritional screening or assessment tools.

METHODS

A comprehensive literature review methodology was employed. A variety of electronic databases were searched for the period 1982-2002. Search terms incorporating nutrition, screening, validity, reliability and sensitivity and specificity were combined to retrieve relevant literature. In addition, manual searches were conducted and articles retrieved from those listed in key papers. In this paper, nutritional screening or assessment tools are described as tools which use a questionnaire-type format containing more than one risk factor for malnutrition, and give a quantitative or categorical assessment of risk.

RESULTS

Seventy-one nutritional tools were located, 21 of which were identified as designated for use with an older population. A wide variety of risk factors for malnutrition are used with the tools, ranging from objective measurements to subjective assessment. Some tools identify an action plan based on the score obtained. Many tools appear not to have been subjected to validity and/or reliability testing but are used clinically.

CONCLUSIONS

As malnutrition is present in the older adult population, nutritional assessment and screening tools can be useful to highlight those in need of a nutritional care plan. However, many have not been subjected to evaluation and consequently may not demonstrate sensitivity and/or specificity in clinical use. The decision to use a particular tool should therefore be considered carefully.

Meal Rounds: An Essential Aspect of Quality Nutrition Services in Long-term Care

INTRODUCTION AND RATIONALE

Weight change and, specifically, weight loss are common in residents of long-term care facilities (LTCFs). The occurrence of weight change results from multifactorial processes, some of which can be considered nutrition risk factors. Meal rounds can be a continuous quality improvement activity to readily identify nutrition risk factors that can influence weight change.

METHODS

This brief report will describe the activity of meal rounds and how they can be used to improve nutrition services. Baseline data from a previously published study on 37 residents will provide proportions of nutrition risk factors identified during meal rounds that can influence weight change.

OUTCOMES

Feeding and eating difficulties are prevalent in residents with dementia (eg, agitation 29.7%, resisting assistance 21.6%). Early identification of these difficulties using meal rounds may be a means of preventing weight change and promoting quality nutrition care in LTCFs. The proposed intervention of meal rounds conducted as described can improve the quality of nutrition services in LTCFs.

Nutrition and aging: assessment and treatment of compromised nutritional status in frail elderly patients

Nutrition is an important determinant of health in persons over the age of 65. Malnutrition in the elderly is often underdiagnosed. Careful nutritional assessment is necessary for both the successful diagnosis and development of comprehensive treatment plans for malnutrition in this population. The purpose of this article is to provide clinicians with an educational overview of this essential but often underecognized aspect of geriatric assessment. This article will review some common issues in nutrition for the elderly in both hospital and community settings. The complexity and impact of multiple comorbidities on the successful nutritional assessment of elderly patients is highlighted by using case scenarios to discuss nutritional issues common to elderly patients and nutritional assessment tools. Three case studies provide some context for an overview of these issues, which include the physiology of aging, weight loss, protein undernutrition, impaired cognition, malnutrition during hospitalization, screening procedures, and general dietary recommendations for patients 65 years of age and older.

Mini nutritional assessment and screening scores are associated with nutritional indicators in elderly people with pressure ulcers

OBJECTIVE

To determine the association between the Mini Nutritional Assessment (MNA) or MNA Screening Form and standard indicators of nutritional status in male elders with pressure ulcers.

DESIGN

Cross-sectional study. MNA and MNA Screening Form scores were related to nutritional indicators using the Pearson correlation.

SUBJECTS/SETTING

Residents (79+/-1 years, N=23 men) of Veterans Affairs medical center nursing home care units with stage I to IV pressure ulcers were enrolled.

MAIN OUTCOME MEASURES

Correlation coefficients were obtained from correlations between the MNA or MNA Screening Form scores and biochemical and anthropometric indices of nutritional status or measures of body composition normalized for height by dividing by height in meters(2).

RESULTS

Hemoglobin (106+/-4 g/L; r=0.43, P=.0409, mean, standard error of the mean, Pearson's r, P value), hematocrit (0.32+/-0.01; r=0.44, P=.0358), body mass index (23.1+/-1.0; r=0.66, P=.0006), calf circumference (30.4+/-1.1 cm; r=0.46, P=.0286), fat-free mass index (18.3+/-0; r=0.60, P=.0063), body cell mass index (8.3+/-0.5; r=0.64, P=.0033), and fat mass index (3.7+/-0.4; r=0.50, P=.0275) positively correlated with MNA score. Serum albumin (31+/-1 g/L) and prealbumin (180+/-17 mg/L) did not correlate with MNA, but prealbumin inversely correlated with erythrocyte sedimentation rate (r=-0.52, P=.0134), a marker of inflammation. The inverse correlation between albumin and erythrocyte sedimentation rate approached statistical significance (r=-0.42, P=.0542). The MNA Screening Form showed similar correlations or lack of correlations observed with the MNA with the exception of hemoglobin and hematocrit.

CONCLUSIONS

The MNA and MNA Screening Form provide advantages over using visceral proteins in screening and assessing nutritional status of elderly people with pressure ulcers.

Nutrition and geriatric psychiatry: a neglected field

PURPOSE OF REVIEW

Nutritional issues have received little attention in geriatric psychiatry research. This review focuses on literature published in 2003 and 2004 on nutritional factors in mental illness in the elderly and proposes directions for future research.

RECENT FINDINGS

There has been more research on the role of micronutrients in psychiatric disorders of older adults but studies examining nutritional state in this population are lacking. The former research suggests associations between low folic acid/vitamin B12 status and depression in older adults whereas evidence for other micronutrients is still tentative. In the latter work, there is only one study that examines malnutrition in psychogeriatric patients despite the availability of well-validated screening tools for assessing nutritional state in the elderly and the known impact of undernutrition in ageing and the development of frailty. The role of obesity in ageing is also relevant especially as more people with schizophrenia live longer, although the current evidence in the non-mentally ill elderly suggests that being overweight may have protective effects in the elderly.

SUMMARY

Malnutrition is likely to have considerable impact on the mental and physical state of the elderly.

Poor nutritional habits are predictors of poor outcome in very old hospitalized patients

BACKGROUND

Malnutrition is prevalent in elderly populations. Recommended methods of nutritional screening are often too complicated and time-consuming for routine application in frail, very old, hospitalized patients.

OBJECTIVE

Our aims were to identify risk factors for development of malnutrition in very old hospitalized patients and to evaluate the total Mini Nutritional Assessment (MNA) score and MNA subscores as predictors of in-hospital and long-term mortality.

DESIGN

A prospective cohort study of patients aged > or =75 y was conducted in a geriatric hospital. Assessment included demographic, clinical, and laboratory data and cognitive, functional, and nutritional status. Follow-up was conducted for < or =2.7 y.

RESULTS

Of the 414 patients studied, only 73 (17.6%) were well-nourished. Low serum albumin and phosphorus concentrations, dementia, and cerebrovascular accident (CVA) were significant risk factors for malnutrition. Survival was significantly lower in malnourished patients and patients at risk of malnutrition than in well-nourished patients (P < 0.0001). Low MNA-3 subscores (dietary habits) were significantly correlated with laboratory indexes of malnutrition and were significantly lower in patients with infections, malignancy, pressure ulcers, dementia, recent orthopedic surgery, and CVA. Multivariate analysis showed that a low MNA-3 score was an independent predictor of mortality; scores <7.5 increased the risk of death 2.05-fold.

CONCLUSIONS

The prevalence of malnutrition was high in elderly hospitalized patients. Dietary habits were significant predictors of poor hospitalization outcome. A questionnaire on dietary habits can serve as a useful tool in assessing nutritional status and prognosis in elderly patients.

Evaluation of Mini-Nutritional Assessment for Japanese frail elderly

OBJECTIVE

We evaluated the Mini-Nutritional Assessment (MNA) test and the short-form MNA as screening tools for malnutrition in the Japanese elderly population.

METHODS

A cross-sectional study of 226 elderly Japanese patients (78.6 +/- 0.5 y of age, mean +/- standard deviation; 67 men and 159 women) in various settings was carried out. Nutritional assessment included MNA, anthropometric measurements, and biochemical markers.

RESULTS

According to the original cutoff point of the full MNA, 19.9% of those assessed were malnourished, 58.0% were at risk of malnutrition, and 22.1% were well nourished. Significant correlations were found between full MNA scores and age (r = -0.14), body mass index (r = 0.59), serum albumin (r = 0.60), total cholesterol (r = 0.36), midarm circumference (r = 0.50), and triceps skinfold (r = 0.37). The sensitivity and specificity of the full MNA score (< 17) for hypoalbuminemia were 0.810 and 0.860, respectively. With a cutoff point lower than 18, sensitivity and specificity hypoalbuminemia were 0.857 and 0.815, respectively. Using a short-form MNA score 12 and higher as normal, its sensitivity and specificity for predicting undernutrition were 0.859 and 0.840, respectively.

CONCLUSIONS

The full and short forms of the MNA were useful tools to identify elderly Japanese patients with malnutrition or risk of malnutrition. However, the full MNA cutoff point for malnutrition should be modulated for this population.

Validity and reliability of SCREEN II (Seniors in the Community: Risk evaluation for eating and nutrition, Version II)

BACKGROUND

Nutrition risk screening for community-living seniors is of great interest in the health arena. However, to be useful, nutrition risk indices need to be valid and reliable. The following three studies describe construct validation, test-retest and inter-rater reliability of SCREEN II.

METHODS

Study (1) seniors were recruited from the general community and from a geriatrician's clinic to complete a nutritional assessment and SCREEN II. 193 older adults provided medical and nutritional history, 3 days of dietary recall and anthropometric measurements. A dietitian reviewed all information collected and ranked seniors on risk: 1 (low) to 10 (high risk). Receiver operating characteristic curves were completed. An abbreviated SCREEN II was developed through statistical analysis and expert ranking of the 17 items. Studies (2) and (3) seniors were recruited from the community to self-administer (n = 149) or be interviewed (n = 97) using SCREEN II twice within 2 weeks. For self-administration one index was completed via mail. Interviewer administration was completed via telephone with two interviewers. Intra-class correlations were calculated.

RESULTS

(1) Total and abbreviated SCREEN II have increased sensitivity and specificity as compared to SCREEN I in identifying seniors at nutritional risk. (2) Test-retest reliability was adequate (intra-class correlation (ICC) = 0.83). (3) Inter-rater reliability was adequate (ICC = 0.83).

CONCLUSIONS

SCREEN II appears to be a valid and reliable tool for the identification of risk for impaired nutritional states in community-living older adults, and is an improvement over SCREEN I.

Simple two-part tool for screening of malnutrition

OBJECTIVE

Malnutrition in hospitalized patients is a major problem that is underdiagnosed. Early recognition of malnutrition is important for nutritional support to be effective. Our aims were to determine the malnutrition rate at our center and to devise an effective screening tool for identifying patients at risk for malnutrition.

METHODS

This prospective study included 2211 patients. Each subject was assessed for malnutrition by the Subjective Global Assessment (SGA), and combination criteria (CC), which included anthropometric measurements and laboratory testing. Findings based on these methods were compared with findings in a series of malnutrition screening tests (malnutrition screening tool, self-assessment portion of a mini-nutritional assessment, a question about unintentional weight loss, evaluation of loss of subcutaneous fat, and various combinations of these).

RESULTS

The SGA and CC methods identified 242 (11.0%) and 345 (15.6%) patients as malnourished, respectively. Of the screening methods that were tested, the combination of unintentional weight loss and loss of subcutaneous fat proved to be the most valuable, with 93% accuracy for predicting malnutrition according to the SGA, and 82.9% accuracy for predicting malnutrition according to CC. The corresponding negative predictive values were 95.5% and 87.3%.

CONCLUSIONS

The results show that this simple two-part nutritional screening tool (unintentional weight loss and loss of subcutaneous fat) is valuable for identifying malnutrition according to the SGA and CC at our institution; however, its validity must be confirmed at other centers.

A New weighted scoring system for Subjective Global Assessment

OBJECTIVE

Subjective Global Assessment (SGA) is a widely used and validated method for identifying and classifying malnutrition. Recently, in effort to assess nutritional status more accurately, quantitative systems have been devised in which scores are assigned for items or components of the SGA. In addition to validation of conventional SGA in our patient population, this prospective study investigated the association of a recently devised quantitative SGA (Q-SGA) method and an invented modified Q-SGA (MQ-SGA) scoring system with conventional SGA.

METHODS

A total of 2197 patients was evaluated. Each subject was assessed for malnutrition by SGA, anthropometric measurements, and laboratory testing. The items of SGA were scored by assigning 1 point for each increasing severity level to obtain the Q-SGA score. In the invented MQ-SGA system, the items were entered into the logistic regression model and weighted scores were calculated according to the weighted effect of the SGA items. The efficiencies of Q-SGA and MQ-SGA were compared to predict malnutrition according to SGA.

RESULTS

Eighty-nine percent of patients were classified as well nourished according to conventional SGA, whereas 27 patients (1.2%) were classified as severely malnourished. When patients were grouped according to binary SGA outcome (well nourished versus malnourished), receiver operating characteristics curve areas for the Q-SGA and MQ-SGA scores were 0.897 (95% confidence interval = 0.875-0.919) and 0.952 (95% confidence interval = 0.939-0.964), respectively. The cutoff points for Q-SGA and MQ-SGA were identified as 10 and 18, respectively. Although the sensitivity of these systems in identifying malnutrition were similar (90.0% and 90.9%, respectively), the specificity of MQ-SGA was greater than that of Q-SGA (85.6% versus 67.0%).

CONCLUSIONS

The findings suggest that MQ-SGA outperforms Q-SGA in identifying malnutrition according to SGA. Future nutrition scoring studies need to take into account the weighted effects of items on outcome.

Food intake and ageing—the role of the gut

Healthy ageing is associated with decreased appetite and energy intake and this is generally associated with weight loss after about 70 years of age. The mechanisms responsible for this 'physiological' anorexia are not well understood, but it may predispose to the development of protein-energy malnutrition in older people, which is associated with increased morbidity and mortality. Many sensory and social factors, including olfactory changes and economic status, contribute to under-nutrition in older people; however, normal ageing is associated with a number of significant changes in gastrointestinal function. The control of appetite is complex but it is clear that gastrointestinal signals are important in the regulation of appetite and food intake. This review examines the role of small intestinal hormones and gastrointestinal motor function in the observed changes to appetite and food intake in older people.