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Table 1 The basic characteristics of the included studies

From: Risk factors for neck hematoma requiring surgical re-intervention after thyroidectomy: a systematic review and meta-analysis

AuthorYearType of studyCountry/RegionNOS scoreAge(Mean)Sex(M/F)No.GravesNo.CancerNo.OthersProcedureHematoma/TotalRate(%)
Liu,J.2016RetrospectiveChina7NA1401/375504167989TT,HT44/51560.85
Suzuki,S.2016RetrospectiveJapan7NA1967/4000033832971518869TT,HT920/519671.77
Narayanan,S.2016RetrospectiveUSA751.2271/1176NA441NATT,HT10/14470.69
Oltmann,S.C.2016RetrospectiveUSA749527/1868NANANATT,HT20/23950.84
Perera,M.2016RetrospectiveAustralia751.641/164NA38NATT,HT9/2054.39
Sorensen,K.R.2015RetrospectiveDenmark753.2378/1134NA309NATT,HT42/15122.77
Dehal,A.2015RetrospectiveUSA7NA32033/145124434237038105954TT,HT2210/1473341.49
Hardman,J.C.2015RetrospectiveUK646.3341/1316NANANATT,HT32/16571.93
Chen,E.2014RetrospectiveChina746.1872/357729620272176TT,HT88/44991.96
Dixon,J.L.2014RetrospectiveUSA7NANANANANATT,HT18/41400.43
Weiss,A.2014RetrospectiveUSA75231186/118826NA46298NATT,HT1870/1500121.25
Vassiliou,I.2013RetrospectiveGreece75463/1532100214TT3/2161.39
Kandil,E.2013RetrospectiveUSA7NANA1197919911229TT366/216251.69
Calo,P.G.2012RetrospectiveItaly7NA8/98NA10NATT,HT3/1062.83
Promberger,R.2012RetrospectiveAustria7NA5727/244151052246036630TT,HT519/301421.72
Agarwal,A.2012RetrospectiveIndia742.7244/569NA266NATT6/8130.74
Lang,B.H.2012RetrospectiveHongkong748569/25174155542117TT,HT22/30860.71
Calo,P,G.2010RetrospectiveItaly756465/20942597991501TT,HT32/25591.25
Godballe,C.2009RetrospectiveDenmark7501147/4343NA774NATT,HT230/54224.24
Shih,M.L.2008RetrospectiveUSA745.482/392NA133NATT,HT4/4740.84
Leyre,P.2008RetrospectiveFrance7541112/5718406NANATT,HT70/68301.02
Bergenfelz,A.2008RetrospectiveSweden7NA659/30016594502551TT,HT76/36602.07
Lefevre,J.H.2007RetrospectiveFrance751108/577NA92NATT,HT6/6850.88
Chiang,F.Y.2006RetrospectiveTaiwan6NANA48NANATT7/1076.54
Ozlem,N.2006RetrospectiveTurkey738180/886NANANATT,HT5/10660.47
Gaujoux,S.2006RetrospectiveFrance749894/4246714NANATT,HT51/51400.99
  1. NOS Newcastle Ottawa Scale, No. Number, M Male, F Female, NA Data not available, TT Total thyroidectomy; HT Hemi−/subtotal/partial thyroidectomy