Table 1.

Temporal trend groups with low and high readmission risk.

Group 1 - non-readmission group
0.0174	Location	1 1 1 1 1 1
0.0164	SaO2	0 1 1 0
0.0159	Respiratory rate	−1 0
0.0141	Respiratory rate	0 −1 0 −1
0.0114	Glucose	1 1 1 1 1 1
0.0113	Anticoagulant	1 1 1 1 1 0
0.0085	MetCarcinoma	1 1 1 1 1 1
0.0080	Heart Rate	−1 −1 0 −1 −1
0.0078	Systolic blood pressure	1 0
0.0078	SaO2	1 1 0 1
0.0068	Diastolic blood pressure	−1 −1 0 −1 −1
Group 2 - readmission group
0.2407	Hemoglobin	−1 −1 −1 −1 −1 −1
0.2043	Red blood count	−1 −1 −1 −1 −1 −1
0.0146	Hematocrit	−1 −1 −1 −1 −1 −1
0.0120	Mg	1 1 1 1 1 1
0.0099	Lactate	2 2 2 2 2 2
0.0092	Minute Ventilation	1 1 1 1 1 1
0.0069	Central Venous Pressure	0 1 0
0.0068	K	1 0
0.0066	SaO2	0 −1 −1
0.0064	Central Venous Pressure	−1 −1
0.0062	Heart Rate	1 1 1 1 1 1

Each trend is represented by a sequence, e.g. “0.2407 Hemoglobin −1 −1 −1 −1 −1 −1,” where 0.2407 is the membership coefficient (the component weight in NMF model), Hemoglobin is the name of measurement and “−1 −1 −1 −1 −1 −1” is the trend. Abbreviations used in the table include: SaO2 -- Saturation of arterial oxygen; MetCarcinoma -- Metastatic Carcinoma; Mg – Magnesium level; K – Potassium level.