Some factors related to malnutrition rate: The group over 60 years old tends to be malnourished 8.67 times higher than the group under 60 years old; The group with 5% or more weight loss within 6 months was 30.24 times more likely to be malnourished than the group maintaining weight or losing weight significantly (<5%) in the past 6 months; The group with gastrointestinal symptoms such as anorexia, nausea tended to be malnourished 20.8 times higher than the group without symptoms (p <0.001).