Table 1.
Baseline (T1) characteristics by trial arm status
| MT N=235 | Psy-Ed N=225 | |||
| N | %/mean (SD) | N | %/mean (SD) | |
| Location | ||||
| London | 168 | 71.5% | 160 | 70.8% |
| Cambridge | 67 | 28.5% | 65 | 28.8% |
| Female | 155 | 66.0% | 151 | 67.1% |
| Age | 235 | 13.8 (1.3) | 225 | 13.9 (1.4) |
| IQ | 221 | 110.6 (19.0) | 218 | 109.5 (16.0) |
| CES-D | 232 | 16.3 (9.9) | 221 | 16.6 (10.3) |
| SDQ-Total | 219 | 12.4 (5.7) | 208 | 13.1 (5.6) |
| WEMWBS | 232 | 47.1 (10.1) | 222 | 47.2 (9.3) |
| CAMM-Total | 233 | 25.2 (8.0) | 221 | 24.1 (7.9) |
| BRIEF-Total | 212 | 133.3 (24.6) | 194 | 136.4 (24.4) |
| DERS-Total | 224 | 85.4 (23.2) | 217 | 88.3 (26.1) |
| aSART-C | 193 | 0.5 (3.7) | 191 | 0.2 (4.0) |
| aSART-RTV | 193 | 0.01 (0.1) | 192 | 0.01 (0.1) |
| aSTROOP | 203 | 63.4 (93.2) | 195 | 61.8 (102.4) |
| aWMC | 219 | 0.02 (0.2) | 205 | 0.03 (0.2) |
aSART-C was computed as the number of errors in the negative condition minus the number in the neutral condition. aSART-C was reliably different to zero (directional 1-sample t-test) at baseline, t=1.79, p=.039. aSART-RTV was computed as RTV in negative condition minus the RTV in the neutral condition. aSART-RTV was reliably different to zero at baseline, t=2.89, p=.004. aStroop was computed as mean reaction time in the incongruent trials minus mean reaction time in the congruent trials. aStroop was reliably different to zero at baseline, t=12.78, p<.0001. aWMC was computed as the proportion of correctly remembered words in the neutral condition minus the proportion remembered in the negative condition. aWMC was reliably different to zero at baseline, t=3.06, p=.002.
aSART-C, Affective Sustained Attention to Response Task Commission error; aSART-RTV, Affective Sustained Attention to Response Task Reaction Time Variance; aStroop, Affective Stroop performance; aWMC, Affective Working Memory Capacity; BRIEF-Total, Behaviour Rating Inventory of Executive Function Version 2 Global Composite Score; CAMM-Total, Child and Adolescent Mindfulness Measure Total Score; CES-D, Center for Epidemiological Studies Depression Scale; DERS-Total, Difficulties with Emotion Regulation Scale Total Score; IQ, score on the Cattell Culture Fair Test29 ; MT, Mindfulness Training; Psy-Ed, psychoeducation training; SDQ-Total, Strengths and Difficulties Questionnaire Total Score; WEMWBS, Warwick-Edinburgh Mental Well-Being Scale.