Table 1.

Components of the SFNR clinical Frailty Instrument

Domain (item)	Operationalisation (test-based)	Cut-point (threshold)
Shrinking (weight loss)	Unintentional weight loss or loss of appetite; report of lose clothing, weight loss documented in patient chart	Any reported weight loss or loss of appetite or lose clothing or >5% last 6 months (from EHR)
Fatigue	Self-reported exhaustion measured by Geriatric Depression Scale (GDS) 4 item	≥2 Points on GDS-431 32
Slowness	Slow gait speed on standardised 4 m measurement from a standing start (best of two consecutive measurements)	Gait speed below 0.8 m/s
Weakness	Low hand grip strength measured by the Martin Vigorimeter (in Kilopascal), best of three consecutive trials at the dominant hand at time of assessment	Below the median of lowest 20% (by gender and age <75 and ≥75 years) compared with a sample of generally healthy Swiss older adults (from the DO-HEALTH study33 34,35
Low activity level	Reported frequency of activities with moderate energy expenditure (question BR016_ModSprtsAct from SHARE questionnaire36	Answer of ‘less than once a week’
Cognition	Three item recall and clock drawing test (CDT)	Any error in recall or CDT indicates cognitive disturbance

EHR, electronic health record; SFNR, Swiss Frailty Network and Repository.