The elderly need to receive continuous treatment or diseases that affect the function of daily life, such as decreased body function, low immune funct……
With the increase of age the number of comorbidities also increases and the prevalence rate of comorbidities is as high as 80% in patients aged 80 years and above.[4 Among people over 65 years old worldwide the prevalence rate of common diseases is 40% to 56%.[3 Nutrition is very important to the elderly with common diseases.1. Comorbidity and malnutrition-many chronic diseases have problems such as excessive energy consumption poor nutrition absorption or inadequate intake which eventually lead to malnutrition. Comorbidities further increase the risk of malnutrition and are not easy to detect making people weaker and weaker in the process of "boiling frogs in warm water" and finally vulnerable. Malnutrition is also a "chronic disease" in essence. The World Health Organization has made it clear that malnutrition was is and will continue to be the leading cause of death worldwide.2. The harm of malnutrition in the elderly with comorbid diseases-malnutrition will lead to muscle loss decreased mobility easy to fall Fracture cognitive decline and other problems in the elderly. At the same time malnutrition can also affect disease control aggravate the disease and promote the decline of functional status (disability inadvertent weight loss of 5% within 3 months or 10% of 6 months body mass index & lt 20 kg/m2)