Venous thromboembolism after arthroscopic shoulder surgery: a systematic review

Table 2 Features of non-case report research

Author	Year	Study design	Data collection	Blind	Baseline	Confounding variables	Follow-up time	Symptoms	Minors score*
Studies without comparison group
Brislin	2007	Case series	Retrospective	No			90 d	Yes	10
Hoxie	2008	Case series	Retrospective	No			42 d	Yes	10
Flanigan	2010	Case series	Retrospective	No			90 d	NA	10
Kuremsky	2011	Case series	Retrospective	No			NM	Yes	10
Duralde	2012	Case series	Retrospective	No			24 m	Yes	10
Martin	2013	Case series	Retrospective	No			30 d	Yes	10
Imberti	2015	Case series	Retrospective	No			90 d	Yes	10
Sager	2019	Case series	Retrospective	No			30 d	Yes	10
Studies with a comparison group
Randelli	2010	Cohort study	Retrospective	No	NM	Not adjusted	NM	Yes	15
Jameson	2011	Case control	Retrospective	No	NM	Not adjusted	90 d	Yes	15
Takahashi	2014	Case control	Prospective	No	NM	Adjusted	90 d	No	18
Schick	2014	Case control	Retrospective	No	Equivalent	Adjusted	NM	Yes	17
Owens	2015	Cohort study	Retrospective	No	Not equivalent	Not adjusted	30 d	Yes	16
Rubenstein	2019	Cohort study	Retrospective	No	NM	Not adjusted	30 d	Yes	15
Stone	2019	Cohort study	Retrospective	No	Equivalent	Adjusted	90 d	Yes	17
Alyea	2019	Cohort study	Retrospective	No	Not equivalent	Not adjusted	6 m	Yes	16
Yeung	2019	Cohort study	Retrospective	No	Equivalent	Not adjusted	NM	Yes	17
Rangan	2019	RCT	Prospective	Yes	Equivalent	Adjusted	12 m	Yes	22

d, day; m, month; MINORS, the methodological index for non-randomized studies; NM, not mentioned; NA, not applicable; RCT, randomized controlled study
*The full score of MINORS for studies without comparison group is 16 and for studies with comparison group is 24

ISSN: 1749-799X