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Mirbazegh S F, Hadavi S, Alipour S, Abbasi N, Vaskooi-Eshkevari K, Soltani-Kermanshahi M, et al . Prevalence of Malnutrition among Hospitalized Elderly Patients in Hospitals Affiliated to Tehran University of Medical Sciences, Tehran, Iran. JNFS 2023; 8 (1) :77-82
URL: http://jnfs.ssu.ac.ir/article-1-470-en.html
Treatment Department of Tehran University of Medical Sciences, Tehran, Iran
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Prevalence of Malnutrition among Hospitalized Elderly Patients in Hospitals Affiliated to Tehran University of Medical Sciences, Tehran, Iran

Seyedeh Fatemeh Mirbazegh; MSN 1, Shima Hadavi; ,MSc *2, Sadaf Alipour; MD 4,
Nasrin Abbasi; MD 5, Khorshid Vaskooi-Eshkevari; PhD 6, Mojtaba Soltani-Kermanshahi; PhD 7,
Soraiya Ebrahimpour-Koujan; PhD 8 & Mehdi Sadeghian; PhD 8
1 Nursing Affair Directorship, Vice Chancellorship for Clinical Administration, Tehran University of Medical Sciences, Tehran, Iran; 2 Treatment Department of Tehran University of Medical Sciences, Tehran, Iran; 3 Amir Alam Hospital Complexes, Tehran University of Medical Sciences, Tehran, Iran; 4 Breast Disease Research Center, Tehran University of Medical Sciences, Tehran, Iran; 5 Treatment Deputy, Tehran University of Medical Sciences, Tehran, Iran; 6 Office of Women Affair, Tehran University of Medical Sciences, Tehran, Iran; 7 Social Determinants of Health Research Center, School of Medicine, Semnan University of Medical Sciences, Semnan, Iran; 8 School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran.
ARTICLE INFO ABSTRACT
ORIGINAL  ARTICLE
Background: Following the improvement in health status and life expectancy in developing countries, the elderly population is increasing. Elderly malnutrition is common across healthcare services and is associated with high costs and adverse outcomes. This study assesses the prevalence of malnutrition among elderly patients in the selected hospitals affiliated to Tehran University of Medical Sciences. Methods: This cross-sectional study was conducted on elderly patients aged 65 years or older in 6 selected hospitals between June and September 2015. Using convenience sampling method, a total of 451 patients were included. Nutritional status was assessed using the Mini Nutritional Assessment (MNA) tool. Results: The mean age of the patients was 71.49 ± 6.60 year and 55.5% were female. The prevalence of malnutrition was 27.3%. A total of 30.8% were at risk of malnutrition, and 41.9% had a normal nutritional status. There were significant associations between nutritional status and chronic diseases, body mass index (BMI), mobility, psychological condition, mid-arm circumference (MAC), calf circumference, and more than three prescription drugs per day (P < 0.001). Conclusion: A satisfactory nutritional status was found among most hospitalized elderly. Future studies with follow-up during and after hospitalization are required.

Keywords: Prevalence; Elderly; Malnutrition; Hospital
Article history:
Received: 3 Sep 2021
Revised: 13 Dec 2021
Accepted:12 Feb 2022
*Corresponding author:
hadavi.nutrition@gmail.com
Treatment Department of Tehran University of Medical Sciences, Tehran, Iran.

Postal code: 1134845767
Tel: +98 21 66760515

Introduction
One of the achievements of this century is to seek medical, economic, and social advancements to extend the lifespan of humans, and subsequently, the aging population. These rapid demographic changes in aging raise important concerns in their healthcare (Shabat et al., 2008). The World Health Organization (WHO) estimates that the population over the age of 60 will reach 2 billion by 2050 from 605 million in 2000 (Carney and Gray, 2015). In Iran, according to the general census of population and housing in 2011, the number of the elderly aged 60 years or older is about 6.6 million, i.e. the proportion of the elderly has increased from 3.3% of the total population in 1996 to 8.3%. The figure will reach more than 10% by 2021 (Statistical Centre of Iran, 2011).
Nutrition is one of the important and effective factors in the mortality rate, disability, and quality of life of the elderly. The results of large studies worldwide have shown that nutritional status has a prominent role in the health and illness of people over 65 years  (Hacihasanoğlu et al., 2012, Vanderwee et al., 2010). Different diseases are necessarily dependent on the elderly, and medication can affect the nutritional status of the elderly (Lemaître et al., 2020). Factors, such as oral health, inability to chew food, impaired perceptual emotional function, social isolation, multiple drug use, socioeconomic status, physical disability, sedentary lifestyle, depression and dementia, degenerative diseases, and loss of taste and smell are all predisposing factors for malnutrition in the elderly (Eshaghi et al., 2007, Morley, 2012, Oliveira et al., 2009, Phillips et al., 2019).
Supporting the elderly to live a healthy life is a big challenge. Providing the elderly with health care depends on the extent to which we can overcome functional limitations, chronic illness, and malnutrition (Fakhar and Soleyman 2013). Since nutritional status affects people's health and ability, inadequate nutrition in old age, in addition to nutritional deficiencies, accelerates the emergence of many specific disorders in this period and requires more healthcare (McCormack, 2004, Nazemi et al., 2015). Therefore, screening and dietary interventions can be cost-effective and reduce hospital stay, complications, and consequently, the cost of care and promote quality of life as the ultimate goal of nursing care. Although malnutrition is considered a common problem in the elderly, it is identifiable, preventive, and curative, and its early diagnosis allows timely intervention (Eshaghi et al., 2007). Various studies in European countries estimate malnutrition in the elderly ranging from 32.9% to 56.2% (Vanderwee et al., 2010). The overall prevalence of malnutrition among Iranian elderly aged over 60 was 12.2% and among the elderly residing in elderly homes was 21.6% (Abolghasem Gorji et al., 2017). In Tehran, only a study reported the prevalence of malnutrition among the elderly residents of nursing homes (Nazemi et al., 2015). However, there is no report for the elderly admitted to the hospitals. Given the importance of nutrition assessment in hospitalized patients and the related adverse outcomes (Ordoñez et al., 2013), the present study aims to assess malnutrition among the hospitalized elderly patients in hospitals affiliated to Tehran University of Medical Sciences.
Materials and Methods
Study design and participants: The current cross-sectional descriptive study was conducted in 6 large hospitals of Tehran University of Medical Sciences (Sina, Baharloo, Imam Khomeini, Valiasr, Ziaiyan, and Shariati) between June and September 2015. In this study, 451 hospitalized elderly aged over 65 years were selected using the convenience sampling method. The participants aged over 65 years who could cooperate with physicians and nutritionists were included. The patients in intensive care units, re-admitted during the study, and those in the end stages of cancer or mental illness were excluded. Sample size calculation was carried out using information regarding the elderly population hospitalized in the selected hospitals and the confidence interval (97%). The researchers outlined the research objectives for the included patients. After measuring height and weight, patients were asked to complete a screening questionnaire. A follow-up questionnaire was completed if the total score was less than 11. The mid-arm circumference (MAC) and the back-leg muscle (CC) were measured with a tape measure.
Measurements: Demographic data, including age, sex, medical condition, and inpatient ward, were asked, and then a standard Mini Nutritional Assessment (MNA) questionnaire was used to screen malnutrition. MNA was previously validated for elderly populations living in a hospital or nursing home (Amirkalali et al., 2010, Guigoz and Vellas, 1997). It is an 18-item questionnaire measuring anthropometric indices (body mass index (BMI), MAC, CC, and weight loss) and nutritional status (number of meals, dietary and fluid intake, and anorexia), as well as performing an overall assessment (lifestyle, medical history, physical activity, psychological stress, dementia, and depression).
The first part of the questionnaire consisted of 6 screening questions. It was interpreted based on total scores and the score of less than 7 was considered malnutrition, 8 to 11 was at risk of malnutrition, and 12 to 14 was considered adequate nutritional status. In addition, a follow-up questionnaire, including 12 measures along with measurements of the MAC and CC was considered for patients with scores less than 11. An MNA score of less than 17 identifies patients with malnutrition. Patients with scores between 17 and 23.5 are at risk of malnutrition, and a score of 24 or greater indicates a good nutritional status (McCormack, 2004).
Ethical considerations:  The Ethics Committee of Tehran University of Medical Sciences approved the study with the code of ethics IR.TUMS.VCR.REC.1396.2049.
Data analysis: The data were analyzed using IBM SPSS version 18 and Microsoft Excel 2016. Quantitative data were reported as mean ± SD and qualitative data as frequency. Kolmogorov-Smirnov test was used to evaluate the normal distribution of data. The Chi-square test was applied to analyze the correlation in the agreement tables. The significance level of tests was considered 0.05.
Results
A total of 451 eligible elderly patients participated in the current study. The mean age of the elderly was 71.49 ± 6.60, and most of them were female (55.5%). Basic patient information are presented in Table 1. Less than half of the elderly (47.9%) had a normal BMI, and only 41.9% of the elderly are no malnutrition. In addition, the elderly patients had at least one underlying condition, and diabetes was the most prevalent (24.4%).
Table 2 shows the relationship between nutritional status with studied variables. As it shows, only sex had no significant association with nutritional status, but the others had the significant association.
Table 1. Demographic characteristics of the patients.
Variables n %
Gender  
   Female
   Male

250
201

55.5
44.5
Cardio-vascular disease 71 15.7
Diabetes mellitus 110 24.4
Hypertension 83 18.4
Respiratory disease 49 10.9
Gastrointestinal disease 72 16.0
Osteoporosis 1 0.2
Neurological disease 6 1.3
Renal disease 40 9.0
Rheumatoid arthritis 18 4.0
Others 1 0.2
Body mass index (kg/m2)  
   <18.5 21 4.7
   18.5-24.9 216 47.9
   25-29.9 154 34.1
   >30 60 13.3
Nutritional status  
   Well-nourished 189 41.9
   At risk 139 30.8
   Malnutrition 123 27.3
Table 2. The relationship between nutritional status with studied variables.
P-valuea Nutritional status
Variables
Malnourished At risk Well-nourished
0.32
92 (48.7)
97 (51.3)

59 (42.4)
80 (57.6)

50 (40.6)b
73 (59.3)
Gender
   Male
   Female
Underlying disease type
0.02 31 ( 16.4) 21 (15.1) 19 (15.4)    Cardio-vascular disease
59 (31.2) 33 (23.7) 18 (14.6)    Diabetes mellitus
32 (17.0) 25 (17.9) 26 (21.1)    Hypertension
12 (6.3) 4 (2.9) 2 (1.6)    Rheumatoid arthritis
16 (8.5) 19 (13.7) 14 (11.4)    Respiratory disease
19 (10.0) 23 (16.5) 30 (24.4)    Gastrointestinal disease
0 (0.0) 1 (0.7) 0 (0.0)    Osteoporosis
2 (1.1) 3 (2.2) 1 (0.8)    Neurological disease
18 (9.5) 10 (7.2) 12 (9.8)    Renal disease
0 (0.0) 0 (0.0) 1 (0.8)    Others
Body mass index (kg/m2)
0.001 1 (4.8) 3 (14.3) 17 (81.0)    <18.5
67 (31.2) 74 (34.4) 74 (34.4)    18.5-24.9
85 (55.6) 43 (28.1) 25 (16.3)    25-29.9
36 (60.0) 19 (31.7) 5 (8.3)    >30

0.001

0 (0.0)
2 (2.3)
30 (17.4)

14 (41.2)
40 (46.5)
85 (49.4)

20 (58.8)
44 (57.2)
57 (23.1)
Middle arm circumference (cm)
   < 21
   21-22
   > 22

0-001

3 (1.8)
29 (22.5)

63 (38.7)
76 (58.9)

97 (59.5)
24 (18.6)
Back leg muscle (cm)
   < 31
   > 31

0.001

6 (9.7)
20 (16.8)
163 (60.4)

16 (25.8)
49 (41.2)
74 (27.4)

40 (64.5)
50 (42.0)
33 (12.2)
Mobility
   Sitting on bed or chair
   Sitting down but cannot get out
   Ability to walk

0.001

34 (16.5)
155 (63.3)

76 (36.9)
63 (25.7)

96 (46.6)
27 (11.0)
Mental stress
   Yes
   No

0.001

1 (3-1)
23 (18.3)
165 (56.3)

12 (37.5)
43 (34.1)
84 (28.7)

19 (59.4)
60 (47.6)
44 (15.0)
Neuropsychiatric problems
   Dementia or Severe depression
   Mild Dementia
   No mental problems

0.001

11 (5.5)
21 (22.8)

83 (41.5)
56 (60.9)

106 (53.0)
15 (16.3)
Three medication per day
   Yes
   No
a: Chi-esquire test, b: N (%)
Discussion
In the current study, 47.9% of the elderly had normal BMI and 41.9% had good nutritional status. A significant relationship was observed between malnutrition with disease type, BMI, MAC, and back-leg muscle. There was also a significant association between nutritional status with mental stress, neurobehavioral problems, and multiple drug use.
Evidence suggests that chronic diseases, such as cardiovascular disease, hypertension, and diabetes mellitus all affect the nutritional needs of the elderly (Mangels, 2018). The elderly had at least one underlying disease, and diabetes (24.4%) was the most prevalent. Previous studies have
reported that 83% of the elderly had at least one underlying disease
(Fakhar and Soleyman 2013).

In terms of malnutrition index, the results showed that 41.9% of the elderly had good nutritional status. In the study by Ismaili Fakhar et al. on 199 elderly people residing in 4 nursing homes in the central province, 27.1% of the elderly had adequate nutritional status, 53.3% were at risk of malnutrition, and 19.6% were malnourished (Fakhar and Soleyman 2013). In another study by Ghorbani et al. on 233 elderly hospitalized in two health centers in Qazvin province, Iran, 42.95% were at risk of malnutrition (Ghorbani et al., 2013).The better nutritional status of the elderly in this study might be due to the larger sample size and the higher standard of living in the capital city. A study of 1350 Iranian elderly showed similar results, in which 53.2% of participants were well-nourished, 41.5% were at risk of malnutrition, and 5.5% were malnourished (Abolghasem Gorji et al., 2017).
There was a significant relationship between BMI and nutritional status in the present study. Various studies have shown that malnutrition is associated with lower BMI. For example, in the study by Eshaghi et al., BMI was reported as an important factor related to malnutrition (Eshaghi et al., 2007). Moreover, a significant relationship was found between motor ability and malnutrition status, attributed to the difficulties in food purchase, preparation, and eating among the elderly (Mangels, 2018).
The study has several strengths, including a large study sample, completion of questionnaires by an expert medical team, and several stages to ensure the accuracy of the responses. However, the cross-sectional design of the current study may limit the causal relationship. Furthermore, the convenience sampling method was used, which is an available and inexpensive method, but may limit the generalization of the results.
Conclusions
Nutritional screening of the elderly population, particularly hospitalized patients, should be prioritized using appropriate tools for health providers.  It is necessary to have timely dietary intervention in the treatment plan and at the time of admission of elderly patients. Although a relatively good nutritional status was found, the nutritional status of the hospitalized elderly cannot be determined by only referring to a single nutritional parameter. Therefore, future studies are required to consider biochemical parameters, such as albumin, hemoglobin, hemoglobin, and total lymphocyte count.
Acknowledgment
The present study was conducted at Tehran University of Medical Sciences. Those who participated in this study are kindly acknowledged.
Authors’ contributions
Mirbazegh F and Abbassi N: Conceived and designed the study; Alipour S and Soltani-Kermanshhi M: Wrote the manuscript and performed the research; Ebrahimpour-Koujan  S: contributed in data collection; Vaskooi-Eshkevari K: Analyzed the data; Hadavi S: had primary responsibility for the final content
Conflicts of interest
The authors declare that they have no conflict of interest.
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Type of article: orginal article | Subject: public specific
Received: 2021/09/3 | Published: 2023/02/21 | ePublished: 2023/02/21

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