Feasibility, acceptability and usability
| Target % or mean | All patients n (%) or mean (SD) | P values* | Mobile mindfulness n (%) or mean (SD) | Telephone mindfulness n (%) or mean (SD) | Education programme n (%) or mean (SD) | |
| Feasibility | ||||||
| Eligible participants who consented | ≥70% | 90 (74%) | 0.33 | NA | NA | NA |
| Consented participants who were randomised | ≥60% | 80 (91%)† | <0.0001 | NA | NA | NA |
| Randomised participants who dropped out | ||||||
| Overall | 14 (18%) | 9 (29%) | 3 (10%) | 2 (11%) | ||
| Before intervention initiated | 9 (64%) | 7 (78%) | 2 (66%) | 0 | ||
| After intervention initiated | 5 (36%) | 2 (22%) | 1 (34%) | 2 (100%) | ||
| Participants who completed all interviews‡ | ≥75% | 66 (83%) | 0.0984 | 22 (71%) | 28 (90%) | 16 (89%) |
| Participants who completed all weekly surveys‡ | ≥60% | NA | 0.004 | 17 (89%) | NA | NA |
| Participants who completed all intervention sessions‡ | ≥50% | NA | <0.0001 | 22 (92%) | 27 (93%) | 17 (94%) |
| Acceptability | ||||||
| CSQ score, mean | ≥10 | 27.9 (3.7) | <0.0001 | 27.6 (3.8) | 29.4 (3.3) | 25.7 (3.2) |
| Usability | ||||||
| SUS score, mean | ≥80 | NA | 0.03* | 86.5 (13.3) | NA | NA |
| Number of participant clicks on website§ | NA | NA | 188.4 (220.8) | NA | NA | |
*P values reflect the two-sided test of the difference between target percentages or means for all patients with the exception of the mean SUS score, which reflects comparison to the mobile mindfulness group alone.
†Denominator is 88 because of two consented who mistakenly met exclusion criteria; see figure 2.
‡Among eligible participants who neither dropped out nor died.
§Using Google analytics; also see online supplement 2.
CSQ, Client Satisfaction Questionnaire; NA, not applicable; SUS, Systems Usability Scale.