The EQ-5D is a scale used to measure the HRQoL developed in Europe, which has been globally tested and used. The EQ-5D has five dimensions including mobility, self-care, daily activities, pain/discomfort, and anxiety/depression. A total of 15 items is included in the EQ-5D. Each dimension has three items assessed by three levels, never, moderate, and severe, of individual quality of life. A participant can only choose one of three levels of their quality of life. It indicates that an assessor only obtains 5 answers from each of 5 domains in the EQ-5D. The hospital discharge EQ-5D will be recalled by participants to report their HRQoL two weeks before admission. The Cronbach's alpha will be retested in this study.

The NPRS is marked with the numbers 0-10 at equal intervals where 0 presents no pain and 10 illustrates the worst pain imaginable. Patients are required to rate the number that represents their current pain intensity. It is well known and broadly used scale in clinical settings. No further reliability and validity tests are needed.

The BI will be used to measure functional disabilities. It is used to assess basic activities of daily living (BADL) in terms of respondent abilities related to feeding, bathing, grooming, dressing, bowel and bladder control, toilet use, transfer, mobility, and stair use. The BI has 30 items with scores range from 0 to 100, with higher scores representing higher independence in performing BADLs. The Chinese version has been applied in older population, with Cronbach's alpha ranging from 0.79 to 0.85. The Cronbach's alpha will be retested in this study.

The GDS-SF is a 15-item scale used to identify depression in older adults. It is from the original GDS developed by Sheikh and Yesavage to examine the self-perceived emotions of older adults. The version will be used in this study is a validated Chinese that has been tested its reliability in geriatric older population in Taiwan. The GDS-SF features binary scores for a total score of 0-15. A higher score indicates a more severe of depression. In the GDS-SF, a score of 0 to 5 is normal, a score > 5 suggests depression, and a score ≥ 10 is almost indicative of depression. The Cronbach's alpha for this study will be retested.

Loneliness has been defined as perceptions of being alone and separated from others. This concept has been conceptualized to measure desired social contacts and actual social contacts. Lin and Lin (2013) used 189 older adults to examine the Chinese ELS scale's reliability and validity. The ELS includes 3 items for social loneliness and 5 items for emotional loneliness. It has been scored by a 4 points Likert Scale from 1 to 4 with a higher score indicating more loneliness. The Cronbach's alpha for this will be retested in this study.

The EQ-5D is a scale used to measure the HRQoL developed in Europe, which has been globally tested and used. The EQ-5D has five dimensions including mobility, self-care, daily activities, pain/discomfort, and anxiety/depression. A total of 15 items is included in the EQ-5D. Each dimension has three items assessed by three levels, never, moderate, and severe, of individual quality of life. A participant can only choose one of three levels of their quality of life. It indicates that an assessor only obtains 5 answers from each of 5 domains in the EQ-5D. The hospital discharge EQ-5D will be recalled by participants to report their HRQoL two weeks before admission. The Cronbach's alpha will be retested in this study.

The NPRS is marked with the numbers 0-10 at equal intervals where 0 presents no pain and 10 illustrates the worst pain imaginable. Patients are required to rate the number that represents their current pain intensity. It is well known and broadly used scale in clinical settings. No further reliability and validity tests are needed.

The BI will be used to measure functional disabilities. It is used to assess basic activities of daily living (BADL) in terms of respondent abilities related to feeding, bathing, grooming, dressing, bowel and bladder control, toilet use, transfer, mobility, and stair use. The BI has 30 items with scores range from 0 to 100, with higher scores representing higher independence in performing BADLs. The Chinese version has been applied in older population, with Cronbach's alpha ranging from 0.79 to 0.85. The Cronbach's alpha will be retested in this study.

The GDS-SF is a 15-item scale used to identify depression in older adults. It is from the original GDS developed by Sheikh and Yesavage to examine the self-perceived emotions of older adults. The version will be used in this study is a validated Chinese that has been tested its reliability in geriatric older population in Taiwan. The GDS-SF features binary scores for a total score of 0-15. A higher score indicates a more severe of depression. In the GDS-SF, a score of 0 to 5 is normal, a score > 5 suggests depression, and a score ≥ 10 is almost indicative of depression. The Cronbach's alpha for this study will be retested.

Loneliness has been defined as perceptions of being alone and separated from others. This concept has been conceptualized to measure desired social contacts and actual social contacts. Lin and Lin (2013) used 189 older adults to examine the Chinese ELS scale's reliability and validity. The ELS includes 3 items for social loneliness and 5 items for emotional loneliness. It has been scored by a 4 points Likert Scale from 1 to 4 with a higher score indicating more loneliness. The Cronbach's alpha for this will be retested in this study.

The EQ-5D is a scale used to measure the HRQoL developed in Europe, which has been globally tested and used. The EQ-5D has five dimensions including mobility, self-care, daily activities, pain/discomfort, and anxiety/depression. A total of 15 items is included in the EQ-5D. Each dimension has three items assessed by three levels, never, moderate, and severe, of individual quality of life. A participant can only choose one of three levels of their quality of life. It indicates that an assessor only obtains 5 answers from each of 5 domains in the EQ-5D. The hospital discharge EQ-5D will be recalled by participants to report their HRQoL two weeks before admission. The Cronbach's alpha will be retested in this study.