Baseline isometric grip strength and cognitive performance (mean (SD))
| Controls | CFS | MDD | Kruskal-Wallis ANOVA, p value | |
|---|---|---|---|---|
| Isometric grip strength MVC (kg) | 35.5 (11.4) | 33.1 (8.5) | 35.0 (7.8) | χ2=0.2 p=0.9 |
| Cognitive tests (scaled scores) | ||||
| Digit span (forwards) | 7.5 (1.4) | 7.1 (1.2) | 7.4 (1.4) | χ2=0.7, p=0.7 |
| Digit span (backwards) | 6.1 (1.7) | 6.1 (1.2) | 4.8 (1.1) | χ2=6.5, p=0.04 |
| Digit symbol substitution | 13.4 (2.6) | 12.3 (2.5) | 11.9 (2.0) | χ2=1.8, p=0.4 |
| Word fluency (letter S only) | 19.7 (7.0) | 18.7 (5.1) | 18.8 (5.7) | χ2=0.0, p=1.0 |
| Telephone search | 11.8 (3.2) | 11.2 (2.9) | 10.1 (3.4) | χ2=0.8, p=0.7 |
| Lottery | 10.7 (3.1) | 10.4 (2.6) | 9.6 (3.2) | χ2=1.9, p=0.4 |