Table 1. Baseline characteristics of study population.

Variable	All N = 114	Li or VPA N = 4	No Li or VPA N = 110
Age at diagnosis (years)  mean (SD)	67.5 (9.8)	70.5 (11.6)	67.4 (9.8)
Primary Malignancy:	n (%)	n (%)	n (%)
Gastro-Esophageal	10 (9)	0	10 (9)
Head and Neck	22 (19)	1 (25)	21 (19)
Lung	25 (22)	1 (25)	24 (22)
Prostate	51 (44)	2 (50)	49 (44)
Sarcoma	2 (2)	0	2 (2)
Skin	1 (1)	0	1 (1)
Urothelial	1 (1)	0	1 (1)
Other	2 (2)	0	2 (2)
Pre-existing neuropathy	20 (18)	1 (25)	19 (17)
Pre-existing diabetes	19 (17)	0	19 (17)
Prior or current heavy alcohol use	42 (37)	1(25)	41 (37)
Current heavy alcohol use	8 (7)	0	8 (7)
Pre-existing substance abuse	9 (8)	0	9 (8)
Pre-existing neurologic disease	20 (18)	1 (25)	19 (17)
Pre-existing psychiatric disease	33 (29)	3 (75)	30 (29)