Table 2.

Participant retention-related data in longitudinal studies of trauma ICU survivors

Participant retention-related issue	Studies reporting, n (%) (N=11)
Study exclusion criteria included barrier(s) to follow-up (eg, homelessness)	8 (72)
Sample size or power calculation	0 (0)
Reported use of strategies to improve participant retention	4 (36)
Mortality reported during follow-up	8 (72)
Reported lost to follow-up rates combined with mortality	2 (18)
Included flow diagram with retention rate for each follow-up time point	5 (45)
Reported reasons for lost to follow-up at each follow-up time point	4 (36)

ICU, intensive care unit.