Table 1.
Characteristics of participants carrying different MAOA genotypes
| MAOA-uVNTRa (n = 114) | Statistics | |||
|---|---|---|---|---|
| SS | SL | LL | ||
| Participants | n = 20 | n = 51 | n = 43 | |
| % Participants | 17.5 | 44.7 | 37.7 | |
| Mean (SD) age at saliva collection | 22.56 (3.95) | 22.00 (3.31) | 22.38 (3.13) | ns |
| Physical and sexual abuse | ||||
| % (n =) physical and/or sexual abuse | 45.0 (9) | 64.7 (33) | 53.5 (23) | ns |
| % (n =) physical abuse only | 8.3 (1) | 18.2 (4) | 16.7 (4) | ns |
| % (n =) sexual abuse only | 21.4 (3) | 43.8 (14) | 31.0 (9) | ns |
| Lifetime diagnoses | ||||
| % (n =) alcohol dependence | 10.0 (2) | 33.3 (17) | 25.6 (11) | ns |
| % (n =) drug dependence | 25.0 (5) | 23.5 (12) | 30.2 (13) | ns |
| % (n =) anxiety disorders | 40.0 (8) | 68.6 (35) | 51.2 (22) | ns |
| % (n =) depression disorders | 55.0 (11) | 68.6 (35) | 51.2 (26) | ns |
| % (n =) conduct disorder before 15 | 30.0 (6) | 41.2 (21) | 37.2 (16) | ns |
| Current diagnoses | ||||
| % (n =) alcohol dependence | 5.0 (1) | 19.6 (10) | 14.0 (6) | ns |
| % (n =) drug dependence | 5.0 (1) | 11.8 (6) | 20.9 (9) | ns |
| MAOA-uVNTRa (n = 143) | ||||
|---|---|---|---|---|
| SS | SL | LL | ||
| % (n =) anxiety disorders | 20.0 (4) | 62.7 (32) | 44.2 (19) | χ2(2, N = 114) = 10.97 p = 0.004 |
| % (n =) depression disorders | 45.0 (9) | 43.1 (22) | 32.6 (14) | ns |
SD standard deviation, LL homozygous for the long alleles, SL heterozygous, SS homozygous for the short alleles, ns not significant
aMonoamine oxidase A variable number of tandem repeats