Sarcopenia in Chronic Lung Diseases
Inclusion criteria A)Outpatients with COPD (chronic obstructive pulmonary disease) or ILD (interstitial lung disease) from department of Chest medicine in Taichung Veterans General Hospital, judged by the doctor that they do not need hospitalization or emergent treatment.

B) Patients who agree to provide the ID card number to the research team for usage as a link to the National Health Insurance research database and Health bank to explore the continuity of care and the use of medical resources
- EligibilityCriteria: Inclusion Criteria:  Outpatients with COPD (chronic obstructive pulmonary disease) or ILD (interstitial lung disease) from department of Chest medicine in Taichung Veterans General Hospital, judged by the doctor that they do not need hospitalization or emergent treatment. Those who meet the conditions for frailty diagnosis after assessment by the Frailty Scale Patients who agree to provide the ID card number to the research team for usage as a link to the National Health Insurance research database and Health bank to explore the continuity of care and the use of medical resources Age>=20  Exclusion Criteria:  Patients who refuse to sign the consent form Patients who are bed ridden or unable to walk due to physical disabilities Patients with terminal cancer or human acquired immunodeficiency syndrome Patients with edema (grading pitting edema +2) - HealthyVolunteers: No - Gender: All - MinimumAge: 20 Years - StdAgeList: Adult, Older Adult - StudyPopulation: Baseline demographic characteristic, health behavior and exercise habits are collected by questionnaires. The main disease diagnosis, medication, clinical assessment questionnaire or biochemical examination and radiological examination results in this inpatient and outpatient visit are collected. Three tools are used to prescreen the candidates, which are SARC-Calf questionnaire, frailty index According to the 2019 Asian Sarcopenia Consensus, participants are examined by SARC-Calf questionnaire, grip strength test and a physical performance test, including sit-stand test, short physical performance battery (SPPB), gait speed test and six-minute walk test. Afterward, bioelectrical impedance analysis (BIA) and Dual-energy X-ray absorptiometry (DXA) are applied to all participants by to analyze body composition. Participants are classified into Sarcopenia group and severe Sarcopenia group. Research nurse provides health education to participants after the assessment. - SamplingMethod: Non-Probability Sample