Abstract
Introduction:
Malnutrition (MN) often goes unrecognized due to ineffective screening techniques. Published standards for multidisciplinary care exist but no consensus on best nutritional assessment for hospitalized patients. Malnutrition is common in cancer and adversely affects clinical outcomes. The Cleveland Clinic Nutrition Therapy Department used in-house criteria to classify MN in hospitalized patients. This study aimed to evaluate the registered dietitian (RD)’s role, the use of these criteria in the acute care palliative medicine unit (ACPMU), and investigate MN prevalence and severity among admitted patients with cancer.
Methods:
Electronic medical records were reviewed for newly admitted patients with cancer to the ACPMU with a first time RD consult and completed nutritional therapy assessment. Physician (MD) assessments were derived from admission notes. Cox regression model assessed the association of MN prevalence and severity with survival. McNemar’s test determined whether a prevalence difference existed between RD and MD.
Results:
Variations existed in criteria used to identify MN. Seventy percent had MN, with the majority (61%) classed as moderate to severe. Prevalence (hazard ratio [HR]: 1.88; P = .002) and severity (HR: 1.22; P = .006) were associated with significantly increased mortality. Evaluations by RD and MD were highly congruent, but MDs underrecorded nutritional status.
Conclusion:
Malnutrition was prevalent and clinically important, even in those on nutritional support. Variations in MN identification were common. Physicians underrecorded MN but were accurate for prevalence and severity when recorded. The data confirm the RD’s important role in MN assessment. Comparable clinical practice and better communication between physicians and dietitians should improve cancer care and optimize quality of life.
Introduction
The prevalence of malnutrition (MN) varies from about 10% in the community to 50% in hospital. 1,2 There is no clear consensus definition. 3,4 It often goes unrecognized 5 due to ineffective screening 6 ; only 50% who are malnourished are identified by medical and nursing staff. 7 Nutritional screening is required for hospital accreditation in the United States. 8 Early screening allows for quicker treatment 7 which may prevent severe MN and improve outcomes. 9
There are published standards for multidisciplinary care, 10,11 but no consensus on the best nutritional assessment for hospitalized patients. 12 At the time of this study, the Cleveland Clinic Nutrition Therapy Department had criteria to classify MN in hospitalized patients. An International Consensus Guideline Committee has since recommended an etiology-based approach to standardize diagnosis and documentation of MN. 13
In 2015, nearly 600,000 people in the United States are expected to die from cancer. 14 Malnutrition is common and adversely affects clinical outcomes including hospital length of stay, quality of life, treatment toxicity, and survival. 15 -17 Progressive weight loss (WL) is common.
Percentage of WL defines severity and helps classify MN status, that is, mild, moderate, or severe. 18 The differences between mild, moderate, and severe MN (except as defined by % WL) are unclear. 13 Current approaches to diagnosis of MN vary widely, specifically with regard to criteria used. 13 Prevalence of MN is inaccurate in many cancer centers. 19 Furthermore, available studies have focused on single tumor sites and/or disease stages. 20
At the Cleveland Clinic, all inpatients are screened by nursing staff within 24 hours of admission. Subsequent registered dietitian (RD) consultations are based upon identified risk per the nursing screen assessment with a consult request placed by any multidisciplinary team member. Within 48 hours of the consult, the RD completes a full assessment. Their role is to develop a nutritional care plan through individualized interventions with interdisciplinary collaboration. This plan is revised as indicated by the clinical situation. Reassessment (by Departmental Policy) varies from 1 to 7 days later based on clinical complexity. The Harry R. Horvitz Center for Palliative Medicine is a 23-bed acute care palliative medicine unit (ACPMU) within the main hospital, 21 1 of 3 inpatient cancer units. Most admissions are cancer related. This study was undertaken because the role of the RD on the ACPMU was ill-defined. 22 We also aimed to establish prevalence and severity of MN in an ACPMU as determined by an RD with a standard nutritional therapy assessment (NTA).
Methods
Data Collection
Ethical approval and a written informed consent waiver were provided by the Cleveland Clinic Institutional Review Board. Electronic medical records (EMRs) were reviewed for all newly admitted patients with cancer to the ACPMU with a first time RD consult and a complete NTA. Exclusion criteria were noncancer diagnoses; in-hospital transfers to the ACPMU; attending an outpatient visit; reassessment by the ACPMU RD; secondary assessments when length of stay exceeds >7 days; and RD consults for education, food preferences, or food allergies. Physician assessments were derived from EMR admission notes. Two research interns and 1 clinical dietetic intern extracted EMR data and entered it into the Research Electronic Data Capture (REDCap, Vanderbilt University, Nashville, Tennessee). 23 Entries were then independently verified by trained research staff. Information collated included age (years), gender, race, primary cancer site, extent of disease, specified comorbidities, height (cm), weight (kg), body mass index (BMI; kg/m2), calculated resting metabolic rate (RMR; kcal/24 h by the Mifflin Sr Jeor equation 24 ), estimated minimum and maximum caloric needs (kcal/d), serum creatinine (mg/dL), albumin (g/dL), prealbumin (mg/dL), transferrin (mg/dL), and potential nutrition-related gastrointestinal (GI) symptoms. Performance status was not available in the EMR.
Cleveland Clinic Nutrition Assessment Protocol
The Cleveland Clinic developed in-house MN criteria for hospitalized adults in 2008 (Appendix A). They were not cancer specific. The presence of ≥2 of 6 criteria was recommended for a diagnosis of MN. These were chosen at the discretion of the RD and were as follows: unintentional WL (UWL; % and trajectory); low BMI (<19 kg/m2); visible muscle wasting on clinical examination; low nutrient intake (% and trajectory); any wound (stages 1-4); and specific abnormal laboratory values (serum prealbumin, albumin, or transferrin).
Statistical Analysis
Descriptive statistics
Categorical variables were summarized as frequency counts and percentages; continuous variables were summarized as median and range.
Predictors of prevalence
Study variables were examined to identify clinical characteristics associated with MN prevalence. Some were excluded because of insufficient EMR data, for example, skin metastasis. Associations were assessed by the Cochran-Armitage trend test (ordinal variables) or χ2 test (categorical variables). Results are presented as the number of patients in each category and the number and percentage with MN.
Predictors of severity
Associations of clinical characteristics and MN severity were assessed using Spearman correlation (ordinal or continuous variables), Wilcoxon rank-sum test (categorical variables with 2 categories), or Kruskal-Wallis test (categorical variables with 3 or more categories).
Prognosis
Kaplan-Meier method estimated survival by both MN prevalence and severity. Ninety-five percent confidence intervals (CI) were calculated for survival estimates and for median survival. Cox proportional hazards analysis assessed association with survival; Cox results are shown as the hazard ratio (HR) and 95% CI for HR.
RD and MD (physician) malnutrition assessment
Prevalence data for both RD and MD were available for 77 people and severity for 71. McNemar’s test was used to compare prevalence between RD and MD; Spearman correlation was used to compare severity.
All statistical tests were 2-sided; P < .05 indicated statistical significance. Analyses were performed with SAS software (SAS Institute Inc, Cary, North Carolina). Percentages were rounded to the nearest whole number.
Results
Electronic medical record data for 182 consecutive patients with cancer newly admitted to the ACPMU with an NTA were evaluated. Median age was 61 years (range 28-96). Fifty-one percent were female and most (81%) were caucasian (Table 1). Median height was 168 cm (range 48-196) and weight 67 kg (range 31-155). The most common cancers were lung (21%), GI (16%), and genitourinary (GU) (15%). The majority had metastatic disease; the most common metastatic sites were bone (41%) and lymph node (34%). Two of the most common comorbidities were hypertension (19%) and diabetes mellitus (10%). Age, gender, and cancer primary site distribution closely resembled 2013 US cancer mortality data. 14 More than two-thirds (70%) had MN, with 61% classed as moderate to severe and 9% as mild. Physicians did not routinely document nutritional status in the EMR so only the NTA by the RD was analyzed.
Demographic Characteristics.
Abbreviations: GI, gastrointestinal; GU, genitourinary.
a>1 Possible, percentages do not add to 100%.
b“Other” counts as 1 site.
Of the 6 Cleveland Clinic malnutrition criteria, BMI data were available in the EMR for 162 patients (Table 2). The majority (86%) had normal BMI values; median 24 kg/m2 (range 14-43). Unintentional WL was available for 132; nearly three-quarters (n = 95) had UWL. In 64% (n = 84) it was severe. Nutrition intake was assessed in 117; 64% had reduced food intake. Muscle wasting was assessed in 62 patients and was present in 53%. Wounds were assessed in 70 patients, with 93% having none. Of 156 with a recorded albumin level, 69% were abnormal. Median albumin was 3.1 g/dL (range 1.6-4.7). Prealbumin was recorded in 2 patients; transferrin was not measured at all.
EMR Documentation of Cleveland Clinic Malnutrition Criteria.
Abbreviations: BMI, body mass index; EMR, electronic medical record.
aIncludes unstageable, multiple stages of lesser degree, nonhealing wounds.
Median creatinine level was 0.7 mg/dL (range 0.3-13). Resting metabolic rate (RMR) median was 1305 kcal/24 h (range 715-1979). Median estimated minimum energy needs was 1805 kcal (range 1084-2620) and maximum was 2133 kcal (range 1265-3150). Of 148 patients with data on nutritional intervention on admission, 48% (n = 71) had none, 46% (n = 68) were on oral supplements, 5% (n = 8) enteral, and 1% (n = 1) parenteral nutrition.
There was considerable variation among which of the 6 MN criteria were chosen by the RD to identify MN (Table 3). Two or 3 of the possible 6 criteria were used in more than half the time (53%).
RD’s Utilization of Cleveland Clinic Malnutrition Criteria.
Abbreviation: BMI, body mass index; RD: registered dietitian.
a>1 Used, percentages do not add to 100%.
Physicians recorded nutritional status in half (n = 91) of the EMR. The majority (77%) of those had MN, with 44% moderate to severe; 9% were noted as malnourished but of unspecified severity. “Cachexia,” “anorexia-cachexia syndrome,” and “cachectic” were also noted separately. Of 18 individual GI symptoms recorded, 1 to 3 per patient were documented in 73%, 4 to 7 in 14%, and none in 14%. Anorexia (53%) was more common than nausea (42%) or vomiting (24%).
Malnutrition Prevalence
Malnutrition was less common in hematologic malignancies compared to solid tumor primary sites (43% vs 73%, P = .018) and in breast cancer compared to other cancers (46% vs 73%, P = .045). It was more common in head and neck (H&N) primary sites (100% vs 68%, P = .025) and with lymph node (83% vs 63%, P = .008) or liver metastases (83% vs 66%, P = .049). Prevalence increased with total number of metastatic sites (P = .035) and total GI symptom number (P = .006). Malnutrition was noted more often when physicians noted vomiting (83% vs 66%, P = .049), abdominal pain (90% vs 67%, P = .038), and cachexia (95% vs 67%, P = .012) but less so with constipation (54% vs 74%, P = .042). Malnutrition severity was associated with abdominal pain (P =.024), cachexia (P = .011), constipation (P = .004), and vomiting (P = .012), and the total number of GI symptoms recorded (Spearman correlation = .25; P = .002).
Multiple additional factors were associated with higher MN prevalence (P < .05; Table 4). It was lower with increased RMR (P < .05). Prevalence was not associated with age, gender, race, comorbidities (hypertension and diabetes mellitus), estimated minimum and maximum caloric needs, anorexia, difficulty swallowing, early satiety, nausea, or serum creatinine.
Malnutrition Prevalence: Predictors.
Abbreviations: BMI, body mass index; GI, gastrointestinal; RMR, resting metabolic rate.
Malnutrition Severity
Severity was associated with H&N primary tumor sites (P = .043), with bone (P = .016), lymph node (P = .046), brain (P = .038), and peritoneal metastases (P = .043), specific nutrition intervention on admission (P = .016), and diabetes mellitus (P = .02). Severity was inversely related to BMI score (P < .001), serum albumin level (P < .001), and RMR (Spearman correlation = −.18; P = .046). However, it was directly related to increased WL prevalence (P <. 001), muscle wasting (P < .001), and wounds (P = .045).
Malnutrition and Prognosis
Prevalence (HR: 1.88; P = .002) and severity (HR: 1.22; P = .006) were associated with significant increases in mortality (Table 5; Figures 1 and 2).
Survival Estimates by Malnutrition Prevalence and Severity.

Survival by prevalence (registered dietitian) of malnutrition (N = 145).

Survival by severity (registered dietitian) of malnutrition (N = 145).
The RD and MD Assessment Congruence
The RD and MD assessments were compared based on prevalence (n = 77) and severity (n = 71). Prevalence rates were similar between RD and MD (77% vs 75%; P = .78). Severity assessments were also moderately well correlated (r = .65; P < .001).
Discussion
Malnutrition was highly prevalent, affecting 70% of patients seen by the RD. It was usually identified by the following 3 criteria:
unintentional WL (47%),
low nutrient intake (39%), and
low serum albumin (29%).
Unintentional WL is a well-validated marker for MN in high-risk populations. Involuntary WL >10% suggests severe MN and worse outcomes. 13,25 However, it may be difficult to determine true WL by history; reported accuracy is 33%. 26 Timing of interventions for WL is controversial. One definition of clinically significant WL is >5% body weight over a 6 to 12-month period, especially when progressive. 27 Weight loss >10% normal body weight represents protein–energy MN. 27
Malnutrition is widespread among hospital inpatients, 28 -31 and inpatients with cancer have the highest prevalence. 28,32 Head and neck cancers often have moderate to severe MN. 33 -36 Findings here support these observations.
Weight loss was common and severe; 72% of those assessed for UWL had either moderate or severe WL. Half were either on oral or on enteral nutrition on admission. Body mass index did not suggest MN. Malnourished people may have a BMI within the healthy or overweight range due to obesity masking loss of lean body mass. Overweight or obese, severely ill adults are at risk of MN and often need intervention. 37,38 A systematic review of the influence of cachexia and sarcopenia on pancreatic cancer reported that in patients with normal weight (BMI: 18.5-24.9 kg/m2), the prevalence of sarcopenia ranged from 29.7% to 65%; in overweight or obese patients (BMI >25 kg/m2) it was 16.2% to 67%. 39 Body mass index alone is not a sensitive parameter to analyze nutritional status because it may still yield high or normal results in patients with ascites or edema. 40 Serum albumin levels were low in most (69%). Serum albumin can vary with hydration, infection, and renal function, 41 so it may not consistently or predictably change with WL. 13
Malnutrition prevalence was not associated with age, gender, race, comorbidities (hypertension and diabetes mellitus), serum creatinine, or estimated caloric needs. Low BMI was present in 14%, but only 8% had MN. Low BMI has been associated with MN even if WL and BMI correlated poorly. 42 Body mass index can detect MN without WL or identify the obese at higher risk of MN. 43 Resting metabolic rate can support the presence of systemic inflammatory response. Paradoxically, MN was less frequent with higher RMR. Controversy exists about RMR in cancer MN; an elevated RMR may depend on individual patient and disease characteristics. 44
Prevalence was associated with significantly increased mortality which supports previous findings. 43 Increased severity was inversely related to shorter survival. Early identification of MN may improve cancer prognosis. Adequate nutrition may also help reduce cancer-related fatigue and promote quality of life. 45
In acute care settings, nurses often complete nutrition screening as part of an admission assessment. 46 Patients identified through screening as malnourished or “at risk” are referred for further nutritional assessment. 29 Physicians also have a role in identifying the need for and supporting effective nutrition treatment. This analysis showed physicians identified an extensive range of GI symptoms; these can cause weight changes in cancer 47,48 and negatively impact nutrient intake. 49 Specifically, abdominal pain, constipation, and vomiting were associated with greater prevalence of MN. Most patients with cancer had WL on admission to ACPMU; this demonstrates the importance of early physician assessment to coordinate care with the RD.
This is the first study to report the combined RD and MD evaluation of cancer MN. Prevalence rates and severity rankings were similar between RD and MD, despite the fact that physicians did not use a formal EMR nutritional assessment tool. They did however underrecord and underassess nutritional status. An earlier study found that only 18% of patients experiencing a recent loss of weight were identified based on nutritional documentation. 50 In addition, their assessments focused primarily on issues in general clinical care. There was physician variation in how and what was documented in the EMR. Use of standardized language is essential to comprehensively document and communicate information. Greater physician knowledge on the importance of assessment and documentation of nutritional status would assist in early diagnosis of MN. Time pressures, inadequate nutrition training for physicians, and lack of RD resources may hinder screening. A simple, rapidly administered screening tool such as the Malnutrition Screening Tool (MST) should be considered; it was designed for use by busy health-care professionals with no particular training in nutrition. It is straightforward, consisting of 2 simple questions evaluating weight change and appetite and takes <5 minutes to perform. 51 Tools such as this would allow nutrition screening to become an integral part of routine clinical practice without being viewed as burdensome to patients or imposing a significant workload on staff.
This study had several limitations. There was a selection bias as the study population included only those referred to the RD. Performance status was not available from the EMR. The Cleveland Clinic Nutrition Assessment Protocol was empiric and applied at a single time point. A validated assessment tool was not used. Inaccurate weight values due to edema or ascites could have underestimated nutritional risk. Similarly, loss of lean muscle mass could have been masked by obesity causing them to remain in the normal or overweight range (BMI). Prior cancer treatments or medications for other comorbidities were not recorded. The EMR had some inherent defects due to variable record keeping.
Malnutrition prevalence and severity were explored in a consecutive unselected cohort of patients with cancer-associated MN in the ACPMU at a tertiary academic care center. The population was representative of a hospitalized advanced cancer population by age, gender, and primary tumor site. The data confirm the important role of the RD in assessment. The development and use of validated screening and assessment tools are essential for effective nutritional intervention and appropriate cancer care. It is noteworthy that the guidelines from the Academy of Nutrition and Dietetics (Academy) and the American Society for Parenteral and Enteral Nutrition (ASPEN) 13 have been adopted by the Cleveland Clinic since completion of this study.
In clinical practice, there are barriers to accurate MN assessment and management. Clinical care of patients with cancer has often focused on the tumor with less attention to disease-related MN. Communication between physicians and dietitians in the recognition of MN will benefit patient care and optimize quality of life.
Conclusion
Malnutrition was highly prevalent in this study population and predicted poor prognosis. Most had a normal BMI which may be misleading and accounted for by preexisting obesity with subsequent WL. Although the majority had a low serum albumin, it is unclear if this is a reflection of disease severity or MN. The MDs identified a range of nutrition impact symptoms some of which predicted MN prevalence.
Physician and RD assessments were highly congruent for prevalence and severity of MN despite the fact that MDs did not use a formal nutritional assessment tool. The Cleveland Clinic Nutrition Assessment Protocol allowed up to 6 different variables to be used in the identification of MN, leading to variation in choice of parameter used between RDs. While an assessment tool was available to RDs, MDs did not use one; this resulted in underrecognition of MN. Improved communication between the RD and the MD could improve recognition and diagnosis of MN. Further areas of research could include multidisciplinary strategies to identify those at nutritional risk and provide early interventions.
Footnotes
Appendix A
Cleveland Clinic Nutrition Assessment Protocol.a
| Criteria | Mild | Moderate | Severe |
|---|---|---|---|
|
|
|||
| 1% to 2%, 1 week | >2%, 1 week | ||
| 5%, 1 month | >5%, 1 month | ||
| 7.5%, 3 months | >7.5%, 3 months | ||
| 10%, 6 months | >10%, 6 months | ||
|
|
17.0-19.0 | 16.0-16.9 | <16.0 |
|
|
No | Yes | Yes |
|
|
Stage 1 | Stage 2 | Stage 3, 4, or unstageable, multiple stages of lesser degree and/or nonhealing wounds |
|
|
Inadequate intake <50% for >7days | Inadequate intake <50% for >7days | Inadequate intake <25% for >7days |
|
|
|||
| Prealbumin, mg/dL | 10-16 | 5-9 | <5 |
| Albumin, g/dL | 3.0-3.4 | 2.4-2.9 | <2.5 |
| Transferrin, mg/dL | 150-175 | 100-149 | <100 |
| Number of criteria recommended to diagnose malnutrition | two bolded criteria | two bolded criteria | two bolded criteria |
Abbreviation: BMI, body mass index.
aAt least 2 criteria must be present to diagnose malnutrition
Authors’ Note
The Harry R. Horvitz Center for Palliative Medicine is a World Health Organization Demonstration Project in Palliative Medicine and is an ESMO Designated Integrated Center of Supportive Oncology and Palliative Care. This study was presented in part at the 7th European Association for Palliative Care Research Congress, June 7-9, 2012, Trondheim, Norway.
Acknowledgments
The authors would like to thank Chanell Upshaw and Vanna Shute for their administrative support.
Declaration of Conflicting Interests
The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
Funding
The author(s) received no financial support for the research, authorship, and/or publication of this article.
