Table 1. Baseline characteristics of the study population.
| Main population characteristics | Control (n=8) | MDD (n=8) | Control versus MDD P-value |
|---|---|---|---|
| Age (years) | |||
| Mean | 37.4 (6.5) | 38.1 (6.5) | 0.878 |
| Min–max | 16–60 | 14–62 | |
| Sex (male), n (%) | 8 (100.0) | 8 (100.0) | NA |
| Ethnicity, n (%) | |||
| White | 4 (50.0) | 5 (62.5) | 0.486 |
| African American | 3 (37.5) | 1 (12.5) | |
| Hispanic | 1 (12.5) | 2 (25.0) | |
| Axis I, n (%) | |||
| MDD | 0 (0.0) | 8 (100.0) | NA |
| None | 8 (100.0) | 0 (0.0) | |
| Toxicology/treatments, n (%) | |||
| CO | 1 (12.5) | 0 (0.0) | 0.262 |
| Analgesics | 0 (0.0) | 2 (25.0) | |
| Anesthetics | 1 (12.5) | 0 (0.0) | |
| None | 6 (75.0) | 6 (75.0) | |
Abbreviations: CO, carbon monoxide; MDD, major depressive disorder.
Data are expressed as mean value (s.e.m.). Statistical analysis was performed using Wilcoxon rank-sum test (P-values of main characteristics are shown). Statistical analyses of ethnicity, Axis I and toxicology were obtained using X2-test.