Table 1.

Demographic characteristics of study participants

	Group; mean (SEM) [range]*
Characteristic	Control participants	Major depressive disorder	Bipolar disorder	Schizophrenia
Age, yr	48 (2.7) [29–68]	47 (2.3) [30–65]	42 (2.9) [25–61]	45 (3.3) [25–62]
Sex, male:female	9:6	9:6	9:6	9:6
PMI, h	23.7 (2.4) [8–42]	27.5 (2.7) [7–47]	32.6 (4.0) [13–62]	33.7 (3.7) [12–61]
pH	6.3 (0.1) [5.8–6.6]	6.2 (0.1) [5.8–6.5]	6.2 (0.1) [5.8–6.5]	6.2 (0.1) [5.8–6.6]

PMI = postmortem interval; SEM = standard error of the mean.

^*Unless otherwise indicated.