Multivariate linear regression analysis indicating association between several variables and the different outcomes.

aVariable removed by Backward Elimination; bNursing Home; cEmergency Department; dShort Portable Mental Status Questionnaire; eBarthel index; fCumulative Illness Rating Scale For Geriatrics.a 经向后消元法（Backward Elimination）移除的变量；b 疗养院（Nursing Home）；c 急诊科（Emergency Department）；d 简易便携式精神状态问卷（Short Portable Mental Status Questionnaire）；e 巴氏指数（Barthel index）；f 老年累积疾病评定量表（Cumulative Illness Rating Scale For Geriatrics）