A review of the validity of malnutrition screening tools used in older adults in community and healthcare settings - A MaNuEL study

Validity of Nutritional Screening Tools for Community-Dwelling Older Adults: A Systematic Review and Meta-Analysis

OBJECTIVES

The aim of this systematic review was to summarize the validity of nutritional screening tools to detect the risk of malnutrition in community-dwelling older adults.

DESIGN

A systematic review and meta-analysis. The protocol for this systematic review was registered in the PROSPERO database (CRD42017072703).

SETTING AND PARTICIPANTS

A literature search was performed in PubMed, EMBASE, CINAHL, and Cochrane using the combined terms "malnutrition," "aged," "community-dwelling," and "screening." The time frame of the literature reviewed was from January 1, 2001, to May 18, 2018. Older community-dwellers were defined as follows: individuals with a mean/median age of >65 years who were community-dwellers or attended hospital outpatient clinics and day hospitals. All nutritional screening tools that were validated in community-dwelling older adults against a reference standard to detect the risk of malnutrition, or with malnutrition, were included.

MEASURES

Meta-analyses were performed on the diagnostic accuracy of identified nutritional screening tools validated against the Mini Nutritional Assessment-Long Form (MNA-LF). The symmetric hierarchical summary receiver operating characteristic models were used to estimate test performance.

RESULTS

Of 7713 articles, 35 articles were included in the systematic review, and 9 articles were included in the meta-analysis. Seventeen nutritional screening tools and 10 reference standards were identified. The meta-analyses showed average sensitivities and specificities of 0.95 (95% confidence interval [CI] 0.75-0.99) and 0.95 (95% CI 0.85-0.99) for the Mini Nutritional Assessment-Short Form (MNA-SF; cutoff point ≤11), 0.85 (95% CI 0.80-0.89) and 0.87 (95% CI 0.86-0.89) for the MNA-SF-V1 (MNA-SF using body mass index, cutoff point ≤11), 0.85 (95% CI 0.77-0.89) and 0.84 (95% CI 0.79-0.87) for the MNA-SF-V2 (MNA-SF using calf circumference instead of body mass, cutoff point ≤11), respectively, using MNA-LF as the reference standard.

CONCLUSIONS AND IMPLICATIONS

The MNA-SF, MNA-SF-V1, and MNA-SF-V2 showed good sensitivity and specificity to detect community-dwelling older adults at risk of malnutrition validated against the MNA-LF. Clinicians should consider the use of the cutoff point ≤11 on the MNA-SF, MNA-SF-V1, and MNA-SF-V2 to identify community-dwelling older adults at risk of malnutrition.

Nutritional Management of Medical Inpatients

Malnutrition is a common condition in hospitalized patients that is often underdiagnosed and undertreated. Hospital malnutrition has multifactorial causes and is associated with negative clinical and economic outcomes. There is now growing evidence from clinical trials for the efficiency and efficacy of nutritional support in the medical inpatient population. Since many medical inpatients at nutritional risk or malnourished are polymorbid (i.e., suffer from multiple comorbidities), this makes the provision of adequate nutritional support a challenging task, given that most of the clinical nutrition guidelines are dedicated to single diseases. This review summarizes the current level of evidence for nutritional support in not critically ill polymorbid medical inpatients.

Management of Malnutrition in Older Patients-Current Approaches, Evidence and Open Questions

Malnutrition is widespread in older people and represents a major geriatric syndrome with multifactorial etiology and severe consequences for health outcomes and quality of life. The aim of the present paper is to describe current approaches and evidence regarding malnutrition treatment and to highlight relevant knowledge gaps that need to be addressed. Recently published guidelines of the European Society for Clinical Nutrition and Metabolism (ESPEN) provide a summary of the available evidence and highlight the wide range of different measures that can be taken-from the identification and elimination of potential causes to enteral and parenteral nutrition-depending on the patient's abilities and needs. However, more than half of the recommendations therein are based on expert consensus because of a lack of evidence, and only three are concern patient-centred outcomes. Future research should further clarify the etiology of malnutrition and identify the most relevant causes in order to prevent malnutrition. Based on limited and partly conflicting evidence and the limitations of existing studies, it remains unclear which interventions are most effective in which patient groups, and if specific situations, diseases or etiologies of malnutrition require specific approaches. Patient-relevant outcomes such as functionality and quality of life need more attention, and research methodology should be harmonised to allow for the comparability of studies.

Similar health economic outcomes in low-risk and high-risk malnourished inpatients as screened by the Malnutrition Screening Tool after delivery of oral nutritional supplements

OBJECTIVE

The aim of this study was to determine whether modified low- and high-risk Malnutrition Screening Tool (MST) scores (2 versus >2, respectively) were independently predictive of health economic outcomes.

METHODS

We analyzed data from a recent nutrition-based quality improvement program (QIP) that prescribed daily oral nutritional supplements for all hospitalized adults at risk for malnutrition. In the original study, an electronic medical records-based MST was administered at the time of admission, and patients were classified as "low risk" or "high risk" for malnutrition based on MST scores (2 versus ≥2). We compared health economic outcomes for patients at low or high risk for malnutrition based on a modified score (MST = 2 versus >2, respectively), looking for between-group differences in length of stay (LOS) and unplanned 30-d readmissions. Analyses were additionally stratified by age (<65 versus ≥65 y of age).

RESULTS

Of the 1269 patients enrolled in the QIP, 413 (32.5%) had MST of 2 and 856 (67.5%) had MST >2. Mean LOS was 5.19 d (±4.78) for patients with MST 2 and 4.49 d (±4.69) with MST >2 (non-statistically significant between-group difference; P = 0.277). There were no significant differences in unplanned 30-d readmission rates (14% for low-risk and 17.1% for high-risk patients; P = 0.171). These findings remained statistically insignificant when the low- and high-risk MST score groups were further stratified by age.

CONCLUSIONS

Outcomes of hospitalized patients with MST 2 were not significantly different from those with an MST >2. This suggests that patients at both lower and higher risk for malnutrition (based on MST scores of 2 versus ≥3) were similar in terms of LOS and 30-d readmission rates. To avoid overlooking cases of malnutrition risk, the validated cutoff scores for the MST should be consistently implemented. Training that is consistent with the validated MST is recommended rather than attempting to reduce the case burden by "raising the bar" and attempting to classify patients with an MST = 2 as "low risk."

[Undernutrition of the elderly]

Malnutrition remains a particularly important issue in elderly. Physiological ageing induces many changes but ageing cannot entirely explain a Protein-Energy Malnutrition (PEM). Nutritionnal screening is indicated once a year in community medicine or in the first 48hours in case of an acute disease or of hospitalization. The Mini Nutritional Assessment is recommended for screening and for the diagnostic of malnutrition. Possible aetiologies are large and must be investigated in order to be careful not to dismiss curable disease and to be able to take corrective actions. PEM is associated to functional decline, length of stay in hospital and to morbi-mortality. Recommendations for dietary intakes in healthy old subjects are about 30 kcal/kg/day and 1 g/kg/day of protein and are strongly enhanced in case of acute or chronic diseases. The nutritional strategy depends on spontaneous food intake, medical situation, patient profile and opinion. Appropriate nutritional care could reduce morbidity-mortality and prevent functional decline in various disease contexts.

Prevalence and Determinants of Undernutrition in A Sample of Dutch Community-Dwelling Older Adults: Results from Two Online Screening Tools

To stimulate undernutrition screening among Dutch community-dwelling adults, a website was developed with general information on healthy eating for healthy aging and self-tests. Based on cross-sectional data obtained from the self-tests, we studied nutritional risk factors (early determinants) as well as risk of undernutrition (late symptoms). SCREEN II (n = 2470) was used to asses nutritional risk factors. This tool consists of 16 items regarding nutritional intake, perception of body weight, appetite, oral health and meal preparation. An adjusted SNAQ65+ (n = 687) was used to assess risk of undernutrition. This four-item tool contains questions on weight loss, appetite, walking stairs and body mass index. Differences between age-groups (65-74, 75-84, ≥85) were tested by logistic regression. Overall prevalence of nutritional risk factors was 84.1%, and increased risk of undernutrition was 56.8%. Participants aged ≥85 scored worst on almost all items of the SCREEN II and the SNAQ65+. In conclusion: A large proportion of older adults reported early determinants for increased nutrition risk, while a smaller, yet remarkable proportion scored positive on undernutrition risk. Internet screening may be a useful, contemporary, and easy, accessible way to reach older adults who are at nutritional risk and may thus contribute to early identification and prevention of undernutrition.

The Challenge of Managing Undernutrition in Older People with Frailty

Many older people with frailty are at risk of malnutrition and poor health, yet there is evidence that improving nutrition and weight loss can reduce frailty. This will become more important as the number of older people with frailty increases worldwide in future. Identifying those at risk is challenging due to the difficulty of reaching and screening those older people most at risk, the large number of nutritional assessment tools used, and the lack of consensus on the criteria to make a diagnosis of malnutrition. The management of older people with or at risk of malnutrition should be multi-modal and multi-disciplinary, and all care staff have an important role in delivering appropriate nutritional advice and support. This paper will highlight a number of practical approaches that clinicians can take to manage malnutrition in older people with frailty in community and acute settings, including environmental changes to enhance mealtime experience, food fortification and supplementation.

SCREEN III: working towards a condensed screening tool to detect nutrition risk in community-dwelling older adults using CLSA data

BACKGROUND/OBJECTIVES

Screening for nutrition risk in community-dwelling older adults increases the likelihood of early intervention to improve nutritional status, with short screening tools preferred. SCREEN-II-AB is a valid 8-item tool. The current study determines whether SCREEN-III, a proposed 3-item version, adequately classifies nutrition risk in comparison.

SUBJECTS/METHODS

Baseline data from the Canadian Longitudinal Study on Aging were used. Seventy-two percent (n = 24,456) of eligible participants (>55 years, complete SCREEN-II-AB) were included. Sensitivity and specificity of various SCREEN-III values compared with SCREEN-II-AB risk determined a nutrition risk cut-point and the proportion misclassified (False[-]) was calculated. Construct validity was tested against a composite variable summarizing outcomes associated with nutrition risk (e.g., self-reported health, hospitalization) using logistic regression adjusted for individual factors (e.g., marital status).

RESULTS

A SCREEN-III cut-point of <22 performed best on sensitivity (0.83 [95% CI = 0.82, 0.84]) and specificity (0.73 [95% CI = 0.72, 0.74]) compared to SCREEN-II-AB (Cramer's V = 0.53). Of those at-risk using SCREEN-II-AB, 16.7% were misclassified as False(-) by SCREEN-III. The False(-) group did not differ significantly from the True(-) group. Based on SCREEN-III, 45.3% of individuals were at nutrition risk, 44% of whom reported the outcome composite. SCREEN-III nutrition risk was associated with greater odds of the outcome composite compared to those not at-risk (OR = 1.40, 95% CI = 1.33, 1.48, P < 0.0001).

CONCLUSION

The proposed version of SCREEN-III demonstrated construct validity, but misclassification of risk may be problematic; further validation of a 3-item version is recommended.

New insights into the anorexia of ageing: from prevention to treatment

PURPOSE OF REVIEW

Undernutrition in older adults is associated with frailty, functional decline, and mortality. The 'anorexia of ageing' is the age-related appetite and weight loss underpinning such undernutrition. This review examines the latest evidence for its prevention and treatment.

RECENT FINDINGS

Existing nutritional therapies for the anorexia of ageing include supporting nutritional intake with fortified food or supplements, including protein, omega-3 fatty acids, multivitamins, and vitamin D. The Mediterranean diet provides high fat intake and nutrient density in a moderate volume of colourful and flavoursome food and is strengthening in evidence for healthy ageing. Studies of the gut microbiome, which potentially regulates normal appetite by acting on the brain-gut communication axis, are pertinent. Utilisation of the genetic profile of individuals to determine nutritional needs is an exciting advancement of the past decade and may become common practice.

SUMMARY

Prevention or early treatment of the anorexia of ageing in older adults is critical. Latest evidence suggests that once significant weight loss has occurred, aggressive nutritional support may not result in improved outcomes.

Malnutrition Screening and Assessment in Hospitalised Older People: a Review

Malnutrition (undernutrition) remains one of the most serious health problems for older people worldwide. Many factors contribute to malnutrition in older people, including: loss of appetite, polypharmacy, dementia, frailty, poor dentition, swallowing difficulties, social isolation, and poverty. Malnutrition is common in the hospital setting, yet often remains undetected by medical staff. The objective of this review is to compare the validity and reliability of Nutritional Screening Tools (NSTs) for older adults in the hospital setting. We also provide an overview of the various nutritional screening and assessment tools used to identify malnutrition in hospitalised older adults. These include: Subjective Global Assessment (SGA), the Mini Nutritional Assessment (MNA), MNA-short form (MNA-SF), Malnutrition Universal Screening Tool (MUST), Simplified Nutritional Appetite Questionnaire (SNAQ), Geriatric Nutrition Risk Index (GNRI) and anthropometric measurements. The prevalence and outcomes of malnutrition in hospitalised older adults are also addressed.

Malnutrition in older adults: screening and determinants

Older adults are at risk of protein-energy malnutrition (PEM). PEM detrimentally impacts on health, cognitive and physical functioning and quality of life. Given these negative health outcomes in the context of an ageing global population, the Healthy Diet for a Healthy Life Joint Programming Initiative Malnutrition in the Elderly (MaNuEL) sought to create a knowledge hub on malnutrition in older adults. This review summarises the findings related to the screening and determinants of malnutrition. Based on a scoring system that incorporated validity, parameters used and practicability, recommendations on setting-specific screening tools for use with older adults were made. These are: DETERMINE your health checklist for the community, Nutritional Form for the Elderly for rehabilitation, Short Nutritional Assessment Questionnaire-Residential Care for residential care and Malnutrition Screening Tool or Mini Nutritional Assessment-Short Form for hospitals. A meta-analysis was conducted on six longitudinal studies from MaNuEL partner countries to identify the determinants of malnutrition. Increasing age, unmarried/separated/divorced status (vs. married but not widowed), difficulties walking 100 m or climbing stairs and hospitalisation in the year prior to baseline or during follow-up predicted malnutrition. The sex-specific predictors of malnutrition were explored within The Irish Longitudinal Study of Ageing dataset. For females, cognitive impairment or receiving social support predicted malnutrition. The predictors for males were falling in the previous 2 years, hospitalisation in the past year and self-reported difficulties in climbing stairs. Incorporation of these findings into public health policy and clinical practice would support the early identification and management of malnutrition.

Development and application of a scoring system to rate malnutrition screening tools used in older adults in community and healthcare settings - A MaNuEL study

RATIONALE

Many malnutrition screening tools are used to screen for risk of malnutrition in older adults. An aim of the Joint Programming Initiative (JPI) 'A Healthy Diet for a Healthy Life' (HDHL) MalNutrition in the ELderly Knowledge hub (MaNuEL) is to devise recommendations on the best tools to screen for risk of malnutrition in older adults in community and healthcare settings across Europe. The aim of this paper was to develop and apply a scoring system to rate malnutrition screening tools.

METHODS

Using a targeted literature search strategy, 48 malnutrition screening tools used to screen for risk of malnutrition in older adults were identified across community, rehabilitation, residential care and hospital settings. Criteria to rate each tool were developed; these were based on published evidence and expert opinion. These criteria were translated into a scoring system.

RESULTS

The scoring system had three equally weighted sections; validation, parameters and practicability, and was applied to all 48 tools. Overall, the highest scoring tools per setting for screening for risk of malnutrition in older adults were i) DETERMINE your health checklist for the community setting; ii) the Nutritional Form for the Elderly (NUFFE) for the rehabilitation setting; iii) the Short Nutritional Assessment Questionnaire-Residential Care (SNAQ^RC) for residential care and iv) both the Malnutrition Screening Tool (MST) and the Mini Nutritional Assessment Short Form Version 1 (MNA-SF-V1) for the hospital setting.

CONCLUSION

Setting-specific tools are more appropriate for use with older adults. These findings will inform recommendations for the optimal screening of geriatric malnutrition across Europe.