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Table 1 The basic characteristics description of included studies

From: Accuracy of MRI diagnosis of early osteonecrosis of the femoral head: a meta-analysis and systematic review

Study

No. of hip

Gender

Age

Genez BM 1998

11

4 M, 3F

11–35

Robinson HJ 1989

96

–

–

Hauzeur JP 1989

49

–

–

Zhang X 1994

30

26 M

24–58

Ryu JS 2002

32

14 M, 10 F

39.5

Liu Jihua 2004

72

40 M, 8 F

43.6

Chen Lei 2005

62

3 M, 21 F

31.8

Zhou Hongmei 2006

91

23 M, 18 F

30–60

Xie Zhongwei 2010

68

34 M, 16 F

34

Sun Lili 2015

50

36 M, 14 F

50.1

Fang Wu 2017

35

20 M, 15 F

57.1

Feng Zhanyou 2017

71

33 M, 38 F

61.5

Cheng Houpei 2016

65

40 M, 25 F

41.14

Qiu Pengdong 2012

59

31 M, 23 F

38.5

Zheng Liwen 2013

98

35 F, 21 M

38.2

Cui Baoli 2014

114

–

32.3

Xie Yan 2014

81

37 M, 32 F

31–62

Jia Hong 2017

40

25 M, 15 F

56.6

Zhang Kaixiang 2016

100

62 M, 38 F

42.3

Lin Chen 2017

42

–

52.87

Lu Chun 2016

52

28 M, 24 F

51.2

Ding Qinmei 2011

62

31 M, 15 F

41.2

Chen Longhua 2015

196

75 M, 45 F

58.4

Luo Zian 2017

93

39 M, 21 F

32.3

Tan Zhihong 2016

131

54 M, 32 F

58.68

Wang Yuli 2017

50

38 M, 12 F

53.8

Wang Wenbin 2012

72

29 M, 11 F

52.5

Liu Xianzhi 2017

29

16 M, 13 F

52.26

Liu Feng 2017

43

25 M, 18 F

58.14

Guo Hongbin 2017

70

39 M, 31 F

44.86

Lin Yi 2015

90

30 M, 20 F

45.6

Wang Linhong 2014

183

60 M, 40 F

47

Fang Chaohui 2014

122

56 M, 38 F

64.8

Li Yan 2014

98

69 M, 29 F

51.52

Liu Dailiang 2015

86

23 M, 20 F

55.36

Xiang Zhenghua 2014

61

35 M, 26 F

52.8

Wu Shiping 2017

75

51 M, 24 F

40.7

Wang Kun 2017

56

34 M, 22 F

38.74

Cai Huaiwei 2017

69

45 M, 24 F

54.6

Li Yanming 2015

37

–

52.6

Ji Xuewen 2017

50

28 M, 22 F

48.3

Wang Sihe 2013

86

32 M, 27 F

32.4

Shen Wen 2014

56

21 M, 15 F

45.3