Table 1:

Eligibility criteria for studies in the systematic review

Characteristics	Inclusion	Exclusion
Study design	• Quantitative studies including RCTs, pseudo-RCTs, cohort studies, case-control studies, case series and cross-sectional studies	• Studies without original participant data (such as reviews, editorials, clinical guidelines)
Participants	• > 20 Adult ICU survivors	• (>50%) of study population <16 years of age • (>50%) of study population was a specialized patient cohort (such as neurological, cardiac surgery, transplantation, or trauma intensive care unit)
Exposure	• ICU admission
Outcomes	• 6MWT after hospital discharge	• Outcomes only assessed in the hospital setting
Publication	• Peer reviewed	• Published prior to 1970 • Conference abstracts or dissertations

Abbreviations: RCT, randomized controlled trial; ICU: intensive care unit; <, less than; >, more than; %, percentage; 6MWT, six-minute walk test.