Table 2

Variables and coding of the SFNR electronic Frailty Index (eFI)

SystemSourceVariables (no.)Cut-point/coding
Functional impairmentsElectronic
health records (EHRs):
electronic
nursing charts (NANDA)
  1. Chronic constipation

  2. Feeling tired

  3. Problems with falling/staying asleep

  4. Problems with sleep–awake cycle

  5. Urinary incontinence

  6. Help getting on/off bed

  7. Help going to the toilet

  8. Help walking

  9. History of falls

  10. Inability to walk stairs

  11. Irregular gait pattern

  12. Patient using walking equipment/aid

  13. Problems getting dressed

  14. Problems with bathing

  15. Clouding or delirium

Embedded Image Yes=1, no=0
 impaired=1, normal=0
16. Food intake
ComorbiditiesEHRs:
diagnosis list
medication use
  1. Active malignancy

  2. Hearing impairment

  3. History of osteoporosis

  4. Cardiac arrhythmias

  5. Coronary heart disease

  6. Pressure sores (decubital ulcers)

  7. Diabetes mellitus

  8. History of seizures

  9. History of stroke

  10. Memory impairment

  11. Chronic obstructive lung disease

  12. Use of anticoagulation medication

  13. Use of antiplatelet medication

  14. Polypharmacy (>5 drugs)

  15. Use of sedative, hypnotic and/or neuroleptic drugs

Presence (yes)=1, absence (no)=0
32. Haematocrit
Laboratory resultsPrimary laboratory System
  1. Haemoglobin

  2. Platelet count

  3. Red cell volume (MCV)

  4. Creatinine

  5. Urea

  6. Thyrotropin

  7. C-reactive protein

  8. Lymphocyte total count

  9. High-density lipoprotein)

  10. Potassium

  11. Sodium

  12. Albumin

  13. Blood glucose

Embedded Image<35%=1,≥35%=0
Serum concentration above or below reference range=1, within=0
<3.9 or>15 mmol/L=1, other=0
>7 or<3.5 mmol/L=1, other=0
46. Cholesterol
Vital signsEHRs
  1. Body temperature

  2. Diastolic blood pressure

  3. Heart rate (pulse)

  4. Systolic blood pressure

  5. Oxygen saturation (SpO2)

  6. Patient requires supplemental oxygen

<36,3°C=1,≥36,3°C=0
>90mmHg=1,≤90 mmHg=0
<60 or>99 BPM=1, other=0
>140mmHg=1,≤140 mmHg=0
<90%=1,≥90%=0
yes=1, no=0
OtherEHRs
  1. Age

  2. Body mass index

  3. Patient reports being in pain

>80=1,≤80=0
<18.5 or≥30=1;>25 and<30=0.5, other=0
yes=1, no=0
  • SFNR, Swiss Frailty Network and Repository.