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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

Author

Year

Type of study

Country/Region

NOS score

Age(Mean)

Sex(M/F)

No.Graves

No.Cancer

No.Others

Procedure

Hematoma/Total

Rate(%)

Liu,J.

2016

Retrospective

China

7

NA

1401/3755

0

4167

989

TT,HT

44/5156

0.85

Suzuki,S.

2016

Retrospective

Japan

7

NA

1967/40000

3383

29715

18869

TT,HT

920/51967

1.77

Narayanan,S.

2016

Retrospective

USA

7

51.2

271/1176

NA

441

NA

TT,HT

10/1447

0.69

Oltmann,S.C.

2016

Retrospective

USA

7

49

527/1868

NA

NA

NA

TT,HT

20/2395

0.84

Perera,M.

2016

Retrospective

Australia

7

51.6

41/164

NA

38

NA

TT,HT

9/205

4.39

Sorensen,K.R.

2015

Retrospective

Denmark

7

53.2

378/1134

NA

309

NA

TT,HT

42/1512

2.77

Dehal,A.

2015

Retrospective

USA

7

NA

32033/145124

4342

37038

105954

TT,HT

2210/147334

1.49

Hardman,J.C.

2015

Retrospective

UK

6

46.3

341/1316

NA

NA

NA

TT,HT

32/1657

1.93

Chen,E.

2014

Retrospective

China

7

46.1

872/3577

296

2027

2176

TT,HT

88/4499

1.96

Dixon,J.L.

2014

Retrospective

USA

7

NA

NA

NA

NA

NA

TT,HT

18/4140

0.43

Weiss,A.

2014

Retrospective

USA

7

52

31186/118826

NA

46298

NA

TT,HT

1870/150012

1.25

Vassiliou,I.

2013

Retrospective

Greece

7

54

63/153

2

100

214

TT

3/216

1.39

Kandil,E.

2013

Retrospective

USA

7

NA

NA

1197

9199

11229

TT

366/21625

1.69

Calo,P.G.

2012

Retrospective

Italy

7

NA

8/98

NA

10

NA

TT,HT

3/106

2.83

Promberger,R.

2012

Retrospective

Austria

7

NA

5727/24415

1052

2460

36630

TT,HT

519/30142

1.72

Agarwal,A.

2012

Retrospective

India

7

42.7

244/569

NA

266

NA

TT

6/813

0.74

Lang,B.H.

2012

Retrospective

Hongkong

7

48

569/2517

415

554

2117

TT,HT

22/3086

0.71

Calo,P,G.

2010

Retrospective

Italy

7

56

465/2094

259

799

1501

TT,HT

32/2559

1.25

Godballe,C.

2009

Retrospective

Denmark

7

50

1147/4343

NA

774

NA

TT,HT

230/5422

4.24

Shih,M.L.

2008

Retrospective

USA

7

45.4

82/392

NA

133

NA

TT,HT

4/474

0.84

Leyre,P.

2008

Retrospective

France

7

54

1112/5718

406

NA

NA

TT,HT

70/6830

1.02

Bergenfelz,A.

2008

Retrospective

Sweden

7

NA

659/3001

659

450

2551

TT,HT

76/3660

2.07

Lefevre,J.H.

2007

Retrospective

France

7

51

108/577

NA

92

NA

TT,HT

6/685

0.88

Chiang,F.Y.

2006

Retrospective

Taiwan

6

NA

NA

48

NA

NA

TT

7/107

6.54

Ozlem,N.

2006

Retrospective

Turkey

7

38

180/886

NA

NA

NA

TT,HT

5/1066

0.47

Gaujoux,S.

2006

Retrospective

France

7

49

894/4246

714

NA

NA

TT,HT

51/5140

0.99

  1. NOS Newcastle Ottawa Scale, No. Number, M Male, F Female, NA Data not available, TT Total thyroidectomy; HT Hemi−/subtotal/partial thyroidectomy