Table 2.

Demographic Characteristics of Subjects

Parameter	NC	DS	DNS	Significance
Subjects (n)	24	24	12	NA
Age	42.08 ± 15.35	38.95 ± 15.39	49.50 ± 17.17	.175 (P1 = 1.00, P2 = .563)
Race	B:7, W:17	B:2, W:22	B:3, W:9	.288
Gender	M:20, F:4	M:14, F:10	M:7, F:5	.239
Postmortem interval (h)	16.54 ± 6.5	18.91 ± 6.02	17.91 ± 9.31	.502 (P1 = .731, P2 = 1.00)
Brain pH	7.01 ± 0.15	6.96 ± 0.25	6.8 ± 0.269	.026 (P1 = 1, P2 = .022)
Drug or alcohol overdose	0	10	0	NA
Antidepressants	0	16	11	NA

Abbreviations: B, Black; DNS, depressed nonsuicide subjects; DS, depressed suicide subjects; F, female; M, male; NC, normal control subjects; W, White.

P1 and P2 = P values for multiple comparison of DS and DNS with NC, respectively, in 1-way ANOVA. Values are presented as mean ± SD.