Table 4 Spearman correlation between the five times sit-to-stand test at ICU discharge and clinical and demographic variables

Age (years)

−0.11

0.20

Body mass Index (kg/m²)

0.07

0.40

SAPS3 score

0.20

< 0.001

ICU length of stay (days)

0.49

< 0.001

MV duration (hours)

0.27

< 0.001

Hospital length of stay (days)

0.56

< 0.001

Handgrip strength (kgf)

−0.57

< 0.001

FIM mobility and transfer domain

−0.67

< 0.001

FIM locomotion domain

−0.66

< 0.001

FIM cognition domain

−0.45

< 0.001

FIM self-care domain

−0.61

< 0.001

FIM sphincter control

−0.15

< 0.03

FIM communication domain

−0.18

< 0.03

FIM global score

−0.67

< 0.001

∆ FIM (previous – discharge)

0.67

< 0.001