Table 1.
Demographic Characteristics and Brain Monoamine Oxidase A (MAO A) Levels (λk3) for 38 Study Participants
| High MAO A Genotype (n = 26) |
Low MAO A Genotype (n = 12) |
|
|---|---|---|
| Age | 31.15 ± 6.7 | 32.9 ± 6.4 |
| Education | 14.96 ± 2.3 | 15.4 ± 1.3 |
| Socioeconomic Status (Hollingshead) |
44.04 ± 10.6 | 43.17 ± 14.04 |
| Intelligence | ||
| WRAT-3 Readinga | 102.76 ± 25 | 101.67 ± 13 |
| WASI MATRIX Reasoningb | 11.42 ± 2.02 | 11.4 ± 2.4 |
| Ethnicity | ||
| White | 18 | 4 |
| African American | 4 | 5 |
| Hispanic | 4 | 2 |
| Asian | 0 | 1 |
| MAO A (λk3) mL g− min−1 | ||
| Medial Frontal Cortex | .273 ± .037 | .273 ± .039 |
| Dorsolateral Prefrontal Cortex |
.279 ± .046 | .264 ± .049 |
| Anterior Cingulate Gyrus | .299 ± .044 | .289 ± .036 |
| Primary Visual Cortexc | .350 ± .055 | .307 ± .048 |
| Temporal Cortex | .293 ± .039 | .289 ± .034 |
| Precuneus | .319 ± .047 | .293 ± .046 |
| Caudate Nucleus | .228 ± .039 | .230 ± .045 |
| Putamen | .266 ± .045 | .262 ± .042 |
| Thalamus | .389 ± .053 | .376 ± .062 |
| Pons | .311 ± .057 | .312 ± .045 |
a
Wide Range Achievement Test III Reading subscale; estimate of verbal IQ.
b
Matrix Reasoning from the Wechsler Abbreviated Scale of Intelligence; estimates of nonverbal/fluid IQ.
c
p = .026 (high > low).