Table 1.
Demographic information and descriptive statistics.
| MAC group (n = 30) | iCBT group (n = 30) | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Mean (SD) | Skew | Kurtosis | SE | Mean (SD) | Skew | Kurtosis | SE | ||
| Age | 29.31 (7.01) | 0.50 | −0.89 | 1.28 | 29.86 (7.86) | 0.76 | −0.47 | 1.44 | t = −0.29, p = 0.78 |
| Gender (F/M) | (21/9) | (17/13) | X2 = 0.65, p = 0.42 | ||||||
| Baseline PHQ-9 | 14.63 (3.55) | 0.32 | −0.39 | 0.65 | 13.33 (3.69) | −0.14 | −0.80 | 0.67 | t = 1.39, p = 0.17 |
| Post Treatment PHQ-9 | 10.63 (4.60) | −0.08 | −0.23 | 0.84 | 7.13 (5.16) | 0.62 | −0.49 | 0.94 | t = 2.77, p = 0.01* |
| Flanker accuracy | 0.22 (0.12) | 0.47 | −0.85 | 0.02 | 0.20 (0.14) | 0.60 | −0.85 | 0.02 | t = 0.77, p = 0.44 |
| Flanker RT | 89.84 (15.45) | 0.68 | −0.38 | 2.82 | 86.14 (19.32) | 0.91 | 0.92 | 3.53 | t = 0.82, p = 0.42 |
| Gratton accuracy | 0.06 (0.12) | −0.50 | −0.20 | 0.02 | 0.08 (0.06) | 0.00 | −0.77 | 0.01 | t = −0.62, p = 0.54 |
| Gratton RT | −3.71 (21.52) | −0.32 | 1.49 | 3.93 | 0.88 (17.07) | −0.63 | 0.88 | 3.12 | t = −0.92, p = 0.36 |
| Post-error accuracy | 0.00 (0.04) | −0.14 | 0.23 | 0.01 | -0.01 (0.03) | −0.54 | 0.15 | 0.01 | t = 0.61, p = 0.55 |
| Post-error RT | 7.90 (23.46) | −0.09 | 0.09 | 4.28 | 6.79 (16.55) | −0.58 | 0.33 | 3.02 | t = 0.21, p = 0.83 |
| dACC-left AI rsFC | 0.64 (0.24) | −0.47 | −0.55 | 0.04 | 0.67 (0.18) | 0.27 | −1.09 | 0.03 | t = −0.41, p = 0.68 |
| dACC-right AI rsFC | 0.53 (0.20) | −0.26 | −0.25 | 0.04 | 0.57 (0.21) | −0.33 | −0.27 | 0.04 | t = −0.83, p = 0.41 |
| dACC-TPJ rsFC | 0.11 (0.20) | 0.20 | −0.13 | 0.04 | 0.14 (0.20) | 0.80 | 1.31 | 0.04 | t = −0.51, p = 0.61 |
| Right AI-left AI rsFC | 0.64 (0.25) | 0.20 | −0.24 | 0.05 | 0.79 (0.21) | −0.61 | 0.26 | 0.04 | t = −2.50, p = 0.02* |
| Left AI-TPJ rsFC | 0.17 (0.20) | 0.09 | −0.51 | 0.04 | 0.19 (0.20) | 0.70 | 0.20 | 0.04 | t = −0.29, p = 0.77 |
| Right AI-TPJ rsFC | 0.39 (0.23) | 0.01 | −0.79 | 0.04 | 0.38 (0.15) | −0.65 | 0.58 | 0.03 | t = 0.15, p = 0.88 |
MAC monitored attention control, iCBT internet-based cognitive behavioral therapy, SD standard deviation, SE standard error, F female, M male, PHQ-9 patient health questionnaire-9, RT response time, dACC dorsal anterior cingulate cortex, AI anterior insula, rsFC resting state functional connectivity, TPJ temporoparietal junction.
For all t-tests, the degree of freedom is 58; for the Chi-squared test, the degree of freedom is 1. For participant race and ethnicity: across the combined sample, participants reported that they were white (63.3%), Asian (13.3%), Black (5%), more than one race (5%), other (3.3%), unknown (10%); 10% reported Hispanic ethnicity, 31.7% did not provide ethnicity information, and 43.3% reported non-Hispanic ethnicity.