Table 1.
Participant characteristics, genotypes and impulsivity parameter.
| Variable | % (N)/mean ± SD (N) |
|---|---|
| Descriptive characteristics and genotypes | |
| Ethnicity (European ancestry) | 100% (998) |
| Sex (women/men) | 61.8% (617)/38.2% (381) |
| Age | 21.67 ± 3.31 (998) |
| BMI | 24.06 ± 4.61 (993) |
| Underweight | 4.1% (41) |
| Normal weight | 64.3% (639) |
| Overweight | 21.7% (215) |
| Obesity | 9.9% (98) |
| FTO rs3751812 | GG: 33.1% (330); GT: 49.1% (490); TT: 17.8% (178) |
| Impulsive choice | |
| Delay discounting of rewards single item yes/no | 70.77% (702)/29.23% (290) |
| Task-based delay discounting of rewards area under the curve ($100 delayed reward) | 0.56 ± 0.27 (992) |
| MCQ-based delay discounting of rewards: average of log transformation of k index for large, medium, and small items | −2.10 ± 0.64 (986) |
| Impulsive action | |
| Go/No Go Task: inhibition of a prepotent response | 6.32 ± 2.76 (921) |
| Stop Signal Task: inhibition of a prepotent response errors | 14.69 ± 7.36 (936) |
| Conner’s continuous performance test: inhibition of a prepotent response | 15.43 ± 6.89 (949) |
| Impulsive personality | |
| UPPS-P: negative urgency | 2.07 ± 0.50 (983) |
| UPPS-P: lack of premeditation | 1.94 ± 0.42 (983) |
| UPPS-P: lack of perseverance | 1.86 ± 0.44 (983) |
| UPPS-P: sensation seeking | 2.80 ± 0.55 (983) |
| UPPS-P: positive urgency | 1.59 ± 0.47 (983) |
| BIS: non-planning | 22.10 ± 4.30 (991) |
| BIS: attentional subscale | 16.57 ± 3.52 (991) |
| BIS: motor subscale | 22.06 ± 3.84 (991) |
MCQ: Monetary Choice Questionnaire; UPPS-P: UPPS-P Impulsive Behavior Scales; BIS: Barrett Impulsivity Scales. Data are mean ± standard deviation for continuous traits and numbers and percentages for categorical traits.