Table 1.

Characterization of input parameters and their importance for best performing RF model.

Parameter	Count dec	Count ndec	Ratio ndec/dec	Mean dec	Mean ndec	Data Type	FI	FI Rank
age	1979	4497	2.27	n/a	n/a	int64	9.41 × 10−3	12
gender	1979	4497	2.27	n/a	n/a	category	3.64 × 10−4	21
ethnicity	1979	4497	2.27	n/a	n/a	category	1.01 × 10−3	19
ICU length	1979	4497	2.27	0.37	0.25	float64	2.72 × 10−1	1
input	1979	793	0.40	2.69 × 103	4615.48	float64	1.27 × 10−1	3
output	1952	784	0.40	1.38 × 103	3543.23	float64	1.73 × 10−1	2
height	1356	442	0.33	168.33	170.02	float64	1.59 × 10−2	11
weight	1472	475	0.32	84.25	85.23	float64	3.09 × 10−2	9
blood pressure	413	185	0.45	118.23	119.24	float64	2.60 × 10−3	15
glucose	311	149	0.48	159.25	148.07	float64	2.84 × 10−3	13
o2sat	224	112	0.50	95.35	96.39	float64	1.27 × 10−3	17
Braden sensory	1519	456	0.30	2.73	3.31	float64	3.37 × 10−2	8
Braden moisture	1518	456	0.30	3.36	3.66	float64	4.33 × 10−2	7
Braden activity	1518	456	0.30	1.21	1.65	float64	1.17 × 10−1	4
Braden mobility	1517	456	0.30	2.28	2.85	float64	6.28 × 10−2	6
Braden nutrition	1517	456	0.30	2.16	2.51	float64	7.85 × 10−2	5
Braden friction	1513	456	0.30	1.80	2.36	float64	2.13 × 10−2	10
albumin	344	138	0.40	2.88	3.27	float64	2.60 × 10−3	16
protein	23	9	0.39	5.65	5.81	float64	2.88 × 10−4	22
bilirubin	491	188	0.38	1.74	1.06	float64	2.71 × 10−3	14
diag. spinal injury	1979	4497	2.27	n/a	n/a	bool	7.30 × 10−5	23
diag. diarrhea	1979	4497	2.27	n/a	n/a	bool	1.04 × 10−3	18
diag. fracture	1979	4497	2.27	n/a	n/a	bool	5.97 × 10−4	20

FI, feature importance; dec, patients with PU; ndec, patients without PU.