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. 2015 Dec 22;5(12):e008828. doi: 10.1136/bmjopen-2015-008828

Table 3.

Summary of the univariate Cox proportional hazards for regaining walking ability of all potential predictor variables

Variable (at T0) χ2 p Value HR 95% CI
Age (years) 7.37 0.007 0.970 0.949 to 0.992
BMI 3.92 0.048 0.972 0.944 to 1.000
Sex (male) 0.00 0.996 1.001 0.637 to 1.573
Duration of illness (days) 1.33 0.249 0.995 0.986 to 1.004
Number of medical tubes (catheters and vascular access) 1.83 0.176 0.901 0.774 to 1.048
Duration of mechanical ventilation (days) 8.05 0.005 0.992 0.986 to 0.997
Number of secondary diagnoses 0.07 0.790 0.996 0.965 to 1.03
ERBI item 1: intensive care supervision 1.37 0.242 1.009 0.994 to 1.023
ERBI item 2: tracheostomy tube management and supervision 0.41 0.524 1.005 0.990 to 1.019
ERBI item 3: intermittent or continuous mechanical ventilation 0.00 0.986 1.000 0.987 to 1.014
ERBI item 4: confused patient (in need of supervision) 2.14 0.144 1.023 0.992 to 1.055
ERBI item 5: behavioural disturbances (patient being a danger to himself or others) 2.37 0.124 0.984 0.965 to 1.004
ERBI item 6: severe impairment of communication 11.24 0.001 1.037 1.015 to 1.060
ERBI item 7: patient with dysphagia in need of supervision 2.43 0.119 0.993 0.983 to 1.002
Ability to reach forward (cm) 4.06 0.044 1.028 1.001 to 1.056
FSS-ICU score (points) 1.99 0.159 1.062 0.977 to 1.115
PFIT-s (points) 0.51 0.475 1.095 0.854 to 1.403
Grip strength (kg) 3.03 0.082 1.075 0.991 to 1.167
MRC sum score upper limb (points) 8.44 0.004 0.715 0.571 to 0.897
MRC sum score lower limb (points) 0.00 0.970 1.004 0.808 to 1.248
VAS (mm) 0.43 0.514 1.012 0.977 to 1.047
MoCA (points) 1.34 0.247 0.960 0.896 to 1.029
CDT (points) 1.23 0.267 0.847 0.632 to 1.136

BMI, body mass index; CDT, clock drawing test; ERBI, Early Rehabilitation Barthel Index; FSS-ICU, Functional Status Score for the intensive care unit; MoCA, Montreal Cognitive Assessment; MRC, Medical Research Council; PFIT-s, Physical Function ICU test (scored); VAS, visual analogue scale.