Table 5 Complete case analysis after adjustment for SOFA, sex and age, HR for risk of ICU death for new classification of CFS

All patients

aHR

P-value

CFS 2–3 vs CFS 1

0.94 (0.71–1.24)

0.65311

CFS 4–5 vs CFS 1

1.01 (0.75–1.36)

0.95538

CFS 6 vs CFS 1

1.2 (0.91–1.57)

0.189

CFS 7 + vs CFS 1

1.43 (1.1–1.86)

0.00842

Patients ≥ 65 years

aHR

P-value

CFS 2–3 vs CFS 1

1.16 (0.94–1.43)

0.15898

CFS 4–5 vs CFS 1

1.28 (1.06–1.55)

0.00995

CFS 6 vs CFS 1

1.56 (1.32–1.84)

 < 0.001

CFS 7 + vs CFS 1

1.78 (1.49–2.12)

 < 0.001