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Table 1 Characteristics of studies included for meta-analysis

From: The prognostic impact of decreased pretreatment haemoglobin level on the survival of patients with lung cancer: a systematic review and meta-analysis

Author

Year

Country

Subtype

Tumor stage

Sample size

Median Age(years)

Gender (M/F)

Treatment modality

Follow up (months)

Survival analysis

Cut-off value (g/dl)

Analysis

Qualitya

Osterlind, K [21]

1986

Denmark

SCLC

NR

778

NR

NR

Chemoradiotherapy

NR

OS

12

MV

6

Albain, K S [22]

1991

USA

NSCLC

NR

1925

NR

77%/23%

Chemotherapy

NR

OS

11

MV

5

Takigawa, N [23]

1996

Japan

NSCLC

Advanced

186

68

134/51

Chemoradiotherapy

NR

OS

11

MV

7

Wigren, T [24]

1997

Finland

NSCLC

Mix

502

65

459/43

Radiotherapy

48

OS

12.5

MV

6

Ohlhauser, C [25]

1997

Germany

NSCLC

Mix

456

65.5

391/65

Radiotherapy

NR

OS

12.7

MV

6

Jazieh, A R [26]

2000

USA

NSCLC

Early

454

67

410/44

Surgery

28

OS,EFS

10

MV

5

Rzyman, W [27]

2003

Poland

NSCLC

Mix

493

59.7

493/100

Surgery

NR

OS

12

MV

5

Bremnes, R M [28]

2003

Norway

SCLC

Limited: 214

Extensive: 222

436

64

280/156

Chemoradiotherapy

>60

OS

Male: 13

Female: 11.5

MV

5

Langendijk, H [29]

2003

Netherland

NSCLC

Mix

529

68

87%/13%

Radiotherapy

>24

OS

Continuous

MV

6

Tammemagi, C M [30]

2003

USA

LC

NR

NR

NR

NR

Mix

29.7

OS

NR

MV

5

Yovino, S [31]

2005

USA

NSCLC

Early

82

68

48/34

Surgery

20.8

OS,RFS

12

MV

7

Berardi, R [32]

2005

Italy

NSCLC

Mix

439

68

374/65

Surgery

27

OS

10

MV

7

Pradier, O [33]

2005

Germany

NSCLC

Advanced

56

NR

44/12

Radiotherapy

NR

OS

11.6

UV

7

Aoe, K [34]

2005

Japan

LC

Mix

611

64

482/129

NR

NR

OS

Male: 13

Female: 12

MV

7

Mohan, A [35]

2006

India

SCLC

Limited: 27.6%

Extensive: 72.4%

76

54.9

84.2%/5.8%

Chemoradiotherapy

NR

OS

12.8

MV

5

Mandrekar, S J [36]

2006

USA

NSCLC

Advanced

1053

63.3

NR

NR

NR

OS, TTP

Male: 13.2

Female: 11.5

MV

5

Laurie, SA [37]

2006

Canada

SCLC

Limited

130

62

63/67

Chemoradiotherapy

NR

OS, PFS

10

MV

6

Paul, I [38]

2006

UK

NSCLC

Mix

42

68.1

35/7

Surgery

55.2

OS

Continuous

MV

6

Gauthier, I [39]

2007

Canada

NSCLC

Early

476

61.3

311/165

Chemotherapy Surgery

NR

OS

12

MV

5

Ademuyiwa, F O [40]

2007

India & USA

NSCLC

Advanced

2013

NR

134/69

Chemoradiotherapy

25.6

OS

Continuous

MV

6

Panagopoulos, ND [41]

2008

Greece

NSCLC

Mix

331

64

295/36

Surgery

27.2

OS

12

MV

7

Park, M J [42]

2008

Korean

NSCLC

NR

358

NR

NR

Chemotherapy

NR

OS

10

MV

5

Jacot, W [43]

2008

France

NSCLC

Mix

301

63

242/59

Mix

20.8

OS

11

MV

6

Florescu, M [44]

2008

Canada

NSCLC

Advanced

485

NR

313/72

Chemotherapy

NR

OS

Male: 13.6

Female: 12

MV

5

Stinchcombe, T E [45]

2009

USA

NSCLC

Advanced

331

NR

218/113

Chemoradiotherapy

88

OS

13

MV

6

Garrido, P [13]

2009

Spain

NSCLC

Advanced

139

NR

127/12

Chemoradiotherapy

23

OS

12

MV

6

Belbaraka, R [46]

2010

France

NSCLC

Advanced

45

58.5

30/15

Chemotherapy

NR

OS

Male: 11.5

Female: 13

MV

7

Qiu MZ [47]

2010

China

NSCLC

Mix

430

59

310/120

Mix

31

OS

11

UV

6

Ovcaricek, T [48]

2010

Slovenia

NSCLC

Mix

53

65

40/13

Chemotherapy

NR

PFS

Continuous

MV

6

Yi, S Y [49]

2011

Korea

NSCLC

Advanced

191

72

NR

Chemotherapy

NR

OS

12

MV

6

Castro, J G [50]

2011

Brazil

NSCLC

Advanced

142

63

95/47

Chemotherapy

NR

OS

12

UV

5

Kishida, Y [14]

2011

Japan

NSCLC

Advanced

86

65

72/14

Chemoradiotherapy

20

OS

12

UV

7

Janku, F [51]

2011

USA

NSCLC

Mix

85

62

51/34

Chemotherapy+ targeted

NR

OS

12

UV

5

Gioulbasanis, I [52]

2011

Greece

LC

NR

115

66

101/14

Chemotherapy

38.2

OS

Continuous

UV

7

Hsu C L [53]

2012

China

NSCLC

Advanced

144

39.1

70/74

Chemoradiotherapy

NR

OS

11

MV

6

Holgersson G [54]

2012

Sweden

NSCLC

Mix

833

NR

NR

Mix

NR

OS

11

MV

5

Ng T [55]

2012

USA

NSCLC

Early

361

NR

161/200

Surgery

48

OS, DFS

Male: 13

Female: 12

MV

7

Wu, C [56]

2012

China

SCLC

Extensive

200

NR

174/26

Chemoradiotherapy

NR

OS

NR

MV

6

Kiely, B E [57]

2013

Australia

NSCLC

Advanced

244

64

146/98

Chemotherapy

21

OS

12

UV

5

Tas, F [58]

2013

Turkey

LC

Mix

100

59

91/9

Chemotherapy

5

OS

12

UV

5

Qu, X [59]

2014

China

NSCLC

Mix

649

58.9

456/193

Surgery

43

OS, RFS

14.6

MV

6

Smith, M O [60]

2014

UK

NSCLC

Mix

563

68.5

305/258

Surgery

NR

OS

13.1

MV

5

Kacan, T [61]

2014

Turkey

NSCLC

Mix

299

61

270/29

Mix

NR

OS

12

MV

5

Strouse, C S [12]

2014

USA

NSCLC

Advanced

2845

NR

NR

Chemotherapy

NR

OS

NR

MV

5

Oguz, A [62]

2014

Turkey

NSCLC

Advanced

186

63

161/25

NR

NR

OS

Continuous

MV

5

Crvenkova, S [63]

2015

Republic of Macedonia

NSCLC

Advanced

85

58.2

75/10

Chemoradiotherapy

36

OS

12

UV

6

Wu, X Y [64]

2015

China

NSCLC

Advanced

186

NR

NR

Chemoradiotherapy

>36

OS

12

UV

6

Imai, H [65]

2015

Japan

NSCLC

Advanced

159

64

126/33

Radiotherapy

NR

OS

Continuous

MV

5

Xie, D [66]

2015

China

SCLC

Limited:555

Extensive: 383

938

68

500/438

Mix

10.8

OS

12

MV

6

Abazari M [67]

2015

Iran

LC

Mix

355

63.5

256/99

Mix

NR

OS

14

UV

5

Cata, J P [68]

2016

USA

NSCLC

Early

861

65.29

394/467

Surgery

108.28

OS, RFS

Male: 13

Female: 12

MV

6

Shaverdian, N [69]

2016

USA

NSCLC

Early

110

76

NR

radiotherapy

28.9

OS,DFS

12

MV

5

Lin, Y [11]

2016

China

NSCLC

Mix

69

56

54/15

Mix

NR

OS,DFS

Male: 12

Female: 11

MV

6

Park S [70]

2016

Korea

NSCLC

Mix

630

64

236/394

Chemotherapy

NR

OS, PFS

Male: 13

Female: 12

UV

5

Shaverdian, N [69]

2016

USA

NSCLC

Early

147

NR

NR

Radiotherapy

28.9

OS, DFS

Continuous

MV

6

Minami, S [71]

2016

Japan

NSCLC

Advanced

103

69.5

85/18

Chemotherapy

NR

OS

Continuous

MV

6

Lee S [72]

2017

Korea

NSCLC

Advanced

135

NR

78/57

Korean medicine

NR

OS

Male: 13

Female: 12

UV

5

  1. Abbreviations: NSCLC non-small cell lung cancer, SCLC small cell lung cancer, LC lung cancer, M/F male/female, NR not reported, OS overall survival, DFS disease-free survival, RFS relapse-free survival, PFS progression-free survival, EFS event-free survival, TTP time to progression, MV multivariate, UV univariate
  2. aThe quality of studies was assessed by Newcastle-Ottawa scale