Items analysis of the Frailty Index (FI-35): Insight in the contribution of each item to the level of frailty

• Xiaohong Zhang ,

  Roles Investigation, Writing – original draft

  * E-mail: x_zhang1213@sina.com (XZ); yh_liu888@163.com (YL)

  Affiliations Tianjin University of Traditional Chinese Medicine, Tianjin, China, Hanze University of Applied Sciences, Research Group Healthy Ageing, Allied Health Care and Nursing, Groningen, The Netherlands

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• C. P. Van Der Schans,

  Roles Conceptualization, Supervision

  Affiliations Hanze University of Applied Sciences, Research Group Healthy Ageing, Allied Health Care and Nursing, Groningen, The Netherlands, Department of Rehabilitation Medicine, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands, Department of Health Psychology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands

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• Yanhui Liu ,

  Roles Investigation

  * E-mail: x_zhang1213@sina.com (XZ); yh_liu888@163.com (YL)

  Affiliation Tianjin University of Traditional Chinese Medicine, Tianjin, China

  https://orcid.org/0000-0003-3620-3646

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• W. Krijnen,

  Roles Methodology

  Affiliation Hanze University of Applied Sciences, Research Group Healthy Ageing, Allied Health Care and Nursing, Groningen, The Netherlands

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• J. S. M. Hobbelen

  Roles Conceptualization, Supervision

  Affiliations Hanze University of Applied Sciences, Research Group Healthy Ageing, Allied Health Care and Nursing, Groningen, The Netherlands, Department of General Practice and Elderly Care Medicine, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands

  https://orcid.org/0000-0003-1852-0955

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