Table 4. Partial correlations (adjusted by the covariates age and years of education) between cognitive variables, physical activity and irisin.
| HC (n = 49) |
OB (n = 21) |
MO (n = 44) |
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Activity | Irisin | Activity | Irisin | Activity | Irisin | ||||||||
| r | p | r | p | r | p | r | p | r | p | r | p | ||
| STROOP | Interference | −0.081 | 0.594 | −0.228* | 0.128 | −0.070 | 0.781 | 0.169 | 0.501 | 0.311* | 0.078 | −0.038 | 0.835 |
| WCST | Total corrects | 0.223* | 0.136 | 0.033 | 0.828 | −0.332* | 0.179 | 0.170 | 0.500 | 0.154 | 0.392 | 0.088 | 0.624 |
| Total errors | −0.056 | 0.711 | 0.233* | 0.119 | 0.136 | 0.591 | 0.159 | 0.530 | −0.057 | 0.754 | −0.148 | 0.410 | |
| Conceptual answers | 0.193 | 0.200 | −0.072 | 0.632 | −0.315* | 0.203 | −0.091 | 0.719 | 0.150 | 0.405 | 0.143 | 0.426 | |
| Categories completed | 0.157 | 0.299 | −0.204* | 0.173 | −0.335* | 0.175 | −0.083 | 0.743 | 0.157 | 0.384 | 0.012 | 0.948 | |
| IGT | Total | −0.283* | 0.056 | 0.151 | 0.317 | 0.491* | 0.038 | −0.194 | 0.440 | −0.293* | 0.098 | −0.335* | 0.057 |
HC, healthy control normal-weight; CO-over., control over-weight; OB, Obesity; MO, Morbid-Obesity. Activity: MVPA score. SCWT, Stroop Color and Word Test; WCST, Wisconsin Card Sorting Test; IGT, Iowa Gambling Task.
*Bold: moderate to high effect size for correlation (|R| > 0.20). Correlation matrix includes Bonferroni’s correction for multiple comparisons.