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Table 1 Patient characteristics of the study population

From: The impact of frailty on survival in elderly intensive care patients with COVID-19: the COVIP study

  All patients Fit (CFS 1–3) Vulnerable (CFS: 4) Frail (CFS: 5–9)
n = 1346 n = 874 n = 193 n = 279
Female sex
 n (%) 381 (28) 209 (24) 64 (34) 108 (39)
Age
 Median (IQR) 75 (72–78) 74 (72–77) 76 (73–79) 78 (74–82)
Frailty score—CFS
 Median (IQR) 3 (2–4) 2 (2–3) 4 (4–4) 6 (5–7)
SOFA score
 Median (IQR) 6 (3–8) 5 (3–8) 6 (3–8) 6 (4–9)
BMI
 Median (IQR) 28 (25–31) 27 (25–30) 28 (25–31) 28 (24–31)
PaO2/FiO2 (mmHg), n (%)
  ≤ 100 485 (37) 319 (37) 65 (35) 101 (37)
  > 100–200 546 (41) 376 (43) 76 (40) 94 (34)
  > 200–300 173 (13) 111 (13) 25 (13) 37 (13)
  > 300 125 (9) 59 (7) 11 (12) 44 (16)
Comorbidities, n (%)
 Diabetes mellitus 471 (35) 240 (27) 89 (47) 142 (51)
 Ischemic heart disease 291 (22) 127 (14) 59 (31) 105 (39)
 Chronic renal insufficiency 211 (16) 77 (9) 31 (17) 103 (38)
 Arterial Hypertension 896 (67) 529 (61) 139 (73) 228 (82)
 Pulmonary disease 314 (24) 169 (20) 60 (32) 85 (31)
 Chronic heart failure 205 (15) 72 (6) 49 (26) 84 (32)
  1. CFS clinical frailty scale, SOFA sequential organ failure assessment score, IQR inter-quartile range, BMI body mass index, PaO2 partial pressure of oxygen, FiO2 fraction of inspired oxygen