Table 2.

The area under the curve performance of the sparse probabilistic graphical model learned by the eigenvalue analysis of the graph Laplacian algorithm directly from the data with different choices of tuning parameters (λ=0,10^–2,10^–1,...,10⁵) for predicting future comorbidities (year 2 to year 5), given the comorbidity information of the past year (year 1), along with the area under the curve performance of a comparing algorithm, namely, Akaike information criterion (AIC) as well as the associated summarization ratios.

Prediction year		Lambda
		0.00	0.01	0.10	1.00	10.00	100.00	1000.00	10000.00	100000.00	AIC
Year 2 (%)
	TBIa	75.69	75.69	75.69	75.88	76.69	79.57	79.91	79.88	79.88	59.49
	PTSDb	78.97	78.97	79.08	79.53	81.31	83.11	84.04	83.70	83.70	63.45
	BaPac	63.16	63.16	63.16	63.63	48.57	78.29	78.83	78.82	78.82	78.51
	SuAbd	72.93	72.93	73.04	73.33	75.22	74.58	82.50	85.00	85.00	61.32
	Depre	68.24	68.24	68.27	68.45	71.02	74.26	81.47	81.61	81.61	59.05
Year 3 (%)
	TBI	72.22	72.22	72.19	72.63	74.82	76.28	76.23	76.11	76.11	62.28
	PTSD	76.01	76.01	76.02	76.84	78.71	80.11	80.61	80.35	80.35	61.95
	BaPa	60.92	60.92	60.98	61.82	70.07	73.15	73.51	73.84	73.84	73.27
	SuAb	70.80	70.80	70.82	71.02	73.62	68.51	79.84	81.13	81.13	61.83
	Depr	65.16	65.16	65.18	65.93	69.01	70.48	77.13	77.10	77.10	56.09
Year 4 (%)
	TBI	70.86	70.86	70.81	71.11	72.96	73.20	72.38	72.39	72.39	60.71
	PTSD	73.21	73.21	73.35	74.11	75.97	78.00	78.22	77.84	77.84	61.97
	BaPa	61.81	61.81	61.82	62.50	69.96	72.98	72.96	72.61	72.61	72.84
	SuAb	68.97	68.97	68.82	68.34	70.88	74.96	77.92	79.64	79.64	60.72
	Depr	64.73	64.73	64.79	65.09	67.29	68.00	72.65	73.54	73.54	56.23
Year 5 (%)
	TBI	70.88	70.88	70.92	71.78	72.50	73.47	69.51	69.38	69.38	59.70
	PTSD	72.72	72.72	72.88	73.43	75.21	76.50	76.15	74.86	74.86	60.59
	BaPa	53.46	53.46	53.41	54.09	69.63	72.64	73.04	68.52	68.52	72.30
	SuAb	63.73	63.73	63.74	61.34	63.46	73.65	76.72	77.26	77.26	61.46
	Depr	64.01	64.01	64.11	64.87	66.58	67.89	69.99	71.37	71.37	56.07
Edge details
	Edges, n	141	140	139	128	107	73	39	24	24	47
	Edge removal (%)	0.00	0.71	1.42	9.22	24.11	48.23	72.34	82.98	82.98	66.67

^aTBI: traumatic brain injury.

^bPTSD: posttraumatic stress disorder.

^cBaPa: back pain.

^dSuAb: substance abuse.

^eDepr: depression.