Summary of group differences using independent samples t test
| Variable | Mean ± SD | p value | t | 95% CI | |
|---|---|---|---|---|---|
| Healthy controls n = 20 | Participants with MDD n = 13 | ||||
| Brain tissue | |||||
| Grey matter, % | 29.36 ± 4.34 | 29.00 ± 5.45 | 0.83 | 0.21 | −3.12 to 3.85 |
| White matter, % | 68.86 ± 4.88 | 69.14 ± 6.29 | 0.89 | −0.14 | −4.25 to 3.69 |
| MRS parameter | |||||
| FWHM, Hz | 7.64 ± 0.34 | 7.78 ± 0.34 | 0.28 | −1.10 | −0.38 to 0.11 |
CI = confidence interval; FWHM = full-width height maximum; MDD = major depressive disorder; MRS = magnetic resonance spectroscopy; SD = standard deviation.