RETRACTED ARTICLE: Leisure-time physical activity and the risk of metabolic syndrome: meta-analysis

Table 2 Quality assessment of included studies in the meta-analysis

Included study	Representativeness of the exposed cohort	Selection of the unexposed cohort	Ascertainment of exposure	Outcome of interest not present at start of study	Control for important factor or additional factor^a	Outcome assessment	Follow-up long enough for outcomes to occur	Adequacy of follow-up of cohorts	Total quality score
Holme et al. (2007) [14]	✩	✩	-	✩	✩✩	✩	✩	-	7
Laaksonen et al. (2002) [22]	✩	✩	-	✩	✩✩	✩	-	✩	7
Cheriyath et al. (2010) [13]	✩	✩	-	✩	✩✩	✩	-	✩	7
Méndez-Hernández et al. 2009 [12]	✩	✩	-	✩	✩✩	✩	-	✩	7
Yang et al. 2008 [21]	✩	✩	-	✩	✩✩	✩	-	✩	7

A study could be awarded a maximum of one star for each item, except for the item control for important factor or additional factor. ^aA maximum of two stars could be awarded for this item.

ISSN: 2047-783X