TABLE 1

Included article details and average risk of bias score

First author year [ref.]	Outcome measure	n	Disease	Agreement/correlation to gold standard	Risk of bias
Briand 2018 [24]	1-min STS	107	ILD	1-min STS and 6MWT r=0.5	Moderate
Carter 2002 [25]	DASI	119	COPD	DASI and 6MWT r=0.53	High
Coute 2017 [26]	DASI	100	CV	Predicted METS from DASI and maximum exercise METS r=0.38	High
Crook 2017 [27]	1-min STS	255 (2 studies combined)	COPD	1-min STS and r=0.59 study 1 at baseline and r=0.67 at follow-up; r=0.64 study 2 at baseline and r=0.68 at follow-up	Moderate
Di Thommazo-Luporini 2015 [28]	Step test (6-min)	56	Obesity	CPET (treadmill test V′_{O_2max}) r=0.56	High
Jones 2013 [29]	5STS	475	COPD	ICC with ISWT −0.59	Low
Kon 2013 [30]	4MGS	586	COPD	4MGS and ISWT r=0.78, 4MGS and ISWT % pred 0.72	Moderate
Matkovic 2017 [31]	4MGS	111	COPD	4MGS and 6MWT r=0.85	Moderate
Mori 2019 [32]	SPPB	53	Charcot–Marie–Tooth	ICC with 6MWT 0.35	High
Meriem 2015 [33]	1-min STS	49	COPD	1-min STS and 6 MWT r=0.47	Moderate
Nolan 2018 [34]	4MGS	46	IPF	4MGS and 6MWT r=0.76	Low
Ozalevli 2007 [35]	1-min STS	53	COPD	1-min STS and 6MWT r=0.75	Moderate
Reed 2020 [36]	DASI and Chester Step test	50	CV	Step test and CPET (treadmill test V′_{O_2max}) r=0.69, DASI and CPET r=0.38	Moderate
Reyschler 2018 [37]	1-min STS	42	COPD	1 min STS and 6 MWT r=0.72	Moderate
Wilkinson 2018 [38]	1 min STS and 5STS	41	CKD	5STS and ISWT r=0.55 time point 1 and r=0.74 at 6 weeks; 1 min STS r not reported	Moderate
Zhang 2018 [39]	5STS and 30 s STS	128	COPD	5STS and 6 MWT r=−0.51, 30 s STS and 6 MWT r=0.53	Moderate

STS: sit to stand; ILD: interstitial lung disease; 6MWT: 6-min walk test; DASI: Duke Activity Status Index; CV: cardiovascular; METS: metabolic equivalents; CPET: cardiopulmonary exercise test; V′_{O_2max}: peak oxygen uptake; ICC: intraclass correlation coefficient; ISWT: incremental shuttle walk test; 4MGS: 4-metre gait speed; SPPB: short physical performance battery; r: correlation coefficient; IPF: idiopathic pulmonary fibrosis; CKD: chronic kidney disease.