62 CHAPTER 4 bias, baseline characteristics of the study population and patients of which no completed RAND-36 could be obtained at the end of the study, were compared and reported in the S1 Table. 4.3 RESULTS 4.3.1 Patient selection and group allocation Between May and November 2019, 107 patients were screened for eligibility, of whom 81 patients gave informed consent for this study. At twelve months, 65 patients completed the RAND-36 questionnaire and were consequently included in the analysis (Figure 1). Thirty-six patients (55%) were allocated to the NR-group with a median physical functioning (PF)-domain score at twelve months of 35 [15–55]. Twenty-nine patients (45%) were added to the R-group (median PF-domain score at twelve months: 95 [83–95]). 4.3.2 Comparison of group characteristics In this study population, 25% was female and the median age of the group was 66 [57–74] years. Patients were managing well in daily life prior to admission Figure 1. Flowchart study inclusion and group allocation Patients screened for eligibility, n=107 Patients included in study, n=81 Completed RAND-36 at 12 months, n=65 Allocated to non-recovery group, n=36 < or ≥ reference value PF Allocated to recovery group, n=29 12 Died before informed consent 6 ICU LOS <48h 4 Expected ICU mortality 4 No informed consent 8 Declined further participation 5 Died during study period 3 Unable to complete questionnaires due to severe cognitive problems
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