The return of outcomes in this trial could not be mandatory.
If participants did not complete the online questionnaires after receiving reminders, they were mailed a paper copy of the BDI-II with a prepaid return envelope to maximize return of the primary outcome measure.
Analyses of secondary outcomes excluded cases with missing outcome information (the primary outcome, return of spontaneous circulation, was ascertained in all study subjects).
Secondary outcomes included return of spontaneous circulation and neurological outcome.
In low-back pain patients their prediction of outcome and return to work is of high prognostic value [ 22, 27], and following myocardial infarction patients' initial positive beliefs concerning their illness favored return to work [ 28].
The admission to hospital after a sustained return of spontaneous circulation and outcome at discharge were obtained.
During the evaluation period, the proportion of patients with prehospital return of spontaneous circulation (primary outcome) did not significantly differ between the feedback-on group (361/815 patients (44%)) and feedback-off group (345/771 (45%)) (table 3).
The characteristics of the included studies are shown in Tables 4, 5, 6. Outcomes: A, return of spontaneous circulation; B, survival of event; C, survival to hospital discharge; D, intact neurological survival; E, reduction in temperature.
Primary outcome was survival to hospital discharge, with secondary outcome measures of return of spontaneous circulation, survival to hospital admission and neurological outcome at discharge.
