[Pathophysiology of catabolism in undernurished elderly patients]

Nutritional Treatment Outcomes of Therapeutic Feeding Program and Its Predictors Among HIV Patients at Hawassa University Comprehensive Specialized Hospital, Hawassa City, Sidama, Southern Ethiopia: A Retrospective Cohort Study

Background

HIV-induced malnutrition is highly prevalent in different parts of the world particularly in sub-Saharan Africa. The food intervention package is one of the strategies that targets malnutrition among HIV-infected people through nutritional evaluation, counseling and care. However, little is known concerning the outcomes of intervention in such patients in treatment program. Therefore, this study aimed to assess nutritional treatment outcomes and its predictors among adult HIV-positive undernourished individuals in Ethiopia.

Methods

Facility based retrospective cohort study was deployed in Adult Antiretroviral therapy clinic of Hawassa University Comprehensive Specialized Hospital. Data of 419 patients were extracted from the food by prescription registration book and patient cards using structured questionnaires. Statistical significance was assessed using Cox-proportional Hazard model by determining hazard ratios and 95% confidence interval.

Results

The proportion of adult HIV patients who recovered from malnutrition after they were enrolled in the food by prescription therapy was 53.0%. The variables found to have an association with good nutritional treatment outcomes of food by prescription in the final model are being female (Adjusted Hazard Ratio (AHR) = 3.38, 95% CI: 2.15, 5.32), secondary education (AHR = 2.16, 95% CI: 1.11, 4.18), tertiary education (AHR = 3.75, 95% CI: 1.66, 8.48), SAM (AHR = 0.20; 95% CI: 0.12, 0.35), and HAART (AHR = 2.70, 95% CI: 1.50, 4.86). Having Severe Acute Malnutrition (SAM) at baseline nutritional assessment (AHR = 3.42, 95% CI; 2.81, 5.15), taking ART for more than 12 months (AHR = 0.26, 95% CI: 0.13, 0.84) and starting HAART immediately after testing positive (AHR = 0.26, 95% CI: 0.13, 0.84) are significantly associated with nutritional treatment failure.

Conclusion

Fifty-three percent of HIV patients recovered from malnutrition after they were enrolled in the food by prescription therapy.

Endocrine and metabolic changes in human aging

Numerous alterations in hormonal secretion occur with aging. In general, these tend towards a disintegration of the normal cyclic secretory patterns resulting in lower total circulating levels. In addition, declines in receptors and postreceptor function further decreases the ability of the hormonal orchestra to maintain coordinated function throughout the organism. Clues to some of these age-related changes in humans may come from the study of simpler organisms where regulatory systems are known to modulate the aging process. In particular, the interactions among the environment, hormones, and insulin receptor genes have led to new insights into the genetic control of longevity and the development of syndrome X.

Frailty

Frailty is a common condition in older people. It now can be objectively defined by the Fried criteria. When recognized, early intervention should begin with the institution of endurance, resistance, and balance exercises. In men with testosterone deficiency a trial of testosterone replacement should be considered. Vitamin D deficiency needs to be recognized and treated. Appropriate treatment of underlying diseases, such as anemia, diabetes mellitus, and congestive heart failure, are a key management principle. In people who have frailty aggressive health promotion and disease prevention techniques can lead to an inhibition of the downward spiral to disability.

Low biochemical nutritional parameters in acutely ill hospitalized elderly patients with and without stage III to IV pressure ulcers

BACKGROUND AND AIMS

Pressure ulcers are associated with impaired nutritional status in acutely ill elderly patients. The objective of this study was to establish whether a difference exists between biochemical nutritional parameters in acutely ill elderly with stage III to IV pressure ulcers and a group of acutely ill elderly with no pressure ulcers.

METHODS

In a retrospective study we compared 8 biochemical nutritional markers in a group of 22 acutely ill elderly patients consecutively admitted to the geriatric ward who had stage III to IV pressure ulcers (PU group) in addition to their acute illness with a control group of 40 acutely ill elderly patients with no pressure ulcers (NPU group).

RESULTS

The PU group compared with the NPU group had significantly lower (p < 0.0001) values of albumin, transferrin, hemoglobin, cholesterol, iron, and zinc (p < 0.0059). Total lymphocyte count was slightly, but not significantly lower in the PU group. In contrast, C-Reactive Protein levels were significantly higher (p < 0.0001) in the PU group compared with the NPU group, indicating a more severe illness in the presence of additional pressure ulcers.

CONCLUSIONS

In this study, serum levels of biochemical nutritional parameters in acutely ill elderly patients with stage III to IV pressure ulcers are lower than those of acutely ill elderly subjects with no pressure ulcers, indicating a worse nutritional status of the PU patients. These findings, while not documenting a causal relationship, suggest the need for routine nutritional assessment and support in older patients, especially those with pressure ulcers.

Decreased food intake with aging

There is a physiological decline in food intake with aging. The reasons for the decline in food intake are multifactorial and involve both peripheral and central mechanisms. Altered hedonic qualities of food occur due to alterations in taste and, more particularly, smell with aging. A decline in adaptive relaxation of the fundus of the stomach and an increased rate of antral filling appear to play a role in the early satiation seen in many older persons. Cholecystokinin levels are increased with aging and older persons are more sensitive to the satiating effects of this gut hormone. The decline in testosterone levels in older males leads to increased leptin levels and this may explain the greater decline in food intake with aging in the male. Within the hypothalamus, decreased activity of both the dynorphin (kappa opioid) and neuropeptide Y systems occurs in aging rodents. Cytokines are potent anorectic agents. Many older persons have mild inflammatory disorders that lead to anorexia. Exercise may increase food intake in older persons.

Anorexia, sarcopenia, and aging

Food intake declines throughout the life span. This physiologic anorexia of aging is caused in part by alterations of stomach-fundus compliance and release and activity of cholecystokinin. In addition, the decline in testosterone in males results in elevated leptin levels that increase the anorexia. There is also evidence that cytokines play a role in the pathogenesis of anorexia and sarcopenia, thus accelerating the development of frailty in older persons. Numerous treatable causes of anorexia and weight loss exist. Depression is the most commonly diagnosed cause of pathologic weight loss in older persons.

Sarcopenia

Sarcopenia is a term utilized to define the loss of muscle mass and strength that occurs with aging. Sarcopenia is believed to play a major role in the pathogenesis of frailty and functional impairment that occurs with old age. Progressive muscle wasting occurs with aging. The prevalence of clinically significant sarcopenia is estimated to range from 8.8% in young old women to 17.5% in old old men. Persons who are obese and sarcopenic (the "fat frail") have worse outcomes than those who are sarcopenic and non-obese. There is a disproportionate atrophy of type IIa muscle fibers with aging. There is also evidence of an age-related decrease in the synthesis rate of myosin heavy chain proteins, the major anabolic protein. Motor units innervating muscle decline with aging, and there is increased irregularity of muscle unit firing. There are indications that cytokines-especially interleukin-1beta, tumor necrosis factor-alpha, and interleukin-6-play a role in the pathogenesis of sarcopenia. Similarly, the decline in anabolic hormones-namely, testosterone, dehydroepiandrosterone growth hormone, and insulin-like growth factor-I-is also implicated in the sarcopenic process. The role of the physiologic anorexia of aging remains to be determined. Decreased physical activity with aging appears to be the key factor involved in producing sarcopenia. An increased research emphasis on the factors involved in the pathogenesis of sarcopenia is needed.

Management of nutritional problems in subacute care

Poor nutritional status is one of the major factors associated with functional decline and mortality in older persons. Older persons are at increased risk for malnutrition because of the physiologic anorexia of aging. During a stay in a subacute care facility, attention to nutrition is a major component of the rehabilitative process. The pathophysiology of malnutrition, diagnostic techniques available to diagnose malnutrition, causes and management of protein energy malnutrition, specific nutritional problems caused by vitamin and trace element deficiency, and nutritional management of specific diseases (e.g., hip fracture and diabetes mellitus) are reviewed.