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Table 1 Basic characteristics of included studies

From: The efficacy and safety of core decompression for the treatment of femoral head necrosis: a systematic review and meta-analysis

Author Year Study type Nation Male/female Age Hips Therapies Evaluation standard Study quality
Gangji 2011 RCT Belgium 9/10 43.86 24 Control: CD
Trial: CD+Marrow
Jadad 6
Zhao 2012 RCT China 53/47 33.25 97 Control: CD
Trial: CD+Marrow
Jadad 6
Pepke 2016 RCT German 21/3 44.4 25 Control: CD
Trial: CD+Marrow
Jadad 5
Zhang HJ 2010 Case-control China 20/12 36.3 39 Control: CD
Trial: CD+Marrow
NOS 8
Zhuo NQ 2012 Case-control China 16/12 31.9 33 Control: CD
Trial: CD+A.B
NOS 9
Guo HS 2018 Case-control China 56/20 44.32 76 Control: CD
Trial: CD+A.B
NOS 9
Warner 1987 Case series USA 13/12 38 39 CD NICE 6
Tooke 1988 Case series USA 14/19 40 45 CD NICE 6
Lausten 1990 Case series Denmark 24/3 40 29 CD NICE 7
Learmonth 1990 Case series South Africa 21/11 37 41 CD NICE 5
Fairbank 1994 Case series USA 45/45 40 128 CD NICE 6
Smith 1995 Case series USA 59/33 41 114 CD NICE 6
Markel 1996 Case series USA 12/33 38.6 54 CD NICE 6
Mont 1997 Case series USA 22/28 34 79 CD NICE 5
Powell 1997 Case series USA 10/12 35 34 CD NICE 6
Iorio 1998 Case series USA NA 40.8 33 CD NICE 5
Bozic 1999 Case series USA 21/13 38 54 CD NICE 6
Steinberg 2001 Case series USA 123/85 37 312 CD+A.B NICE 5
Hernigou 2002 Case series USA 75/41 31 189 CD+Marrow NICE 6
Lieberman 2004 Case series USA 6/9 47 17 CD NICE 5
Belmar 2004 Case series USA NA NA 302 CD NICE 5
Song 2007 Case series South Korea 120/16 36.1 163 CD NICE 6
Li YP 2007 Case series China 19/6 37.2 36 CD+A.B NICE 5
Ji WF 2008 Case series China 71/16 47 103 CD+Marrow NICE 5
Xu WH 2009 Case series China 26/14 35.6 42 CD+A.B NICE 5
Wang 2010 Case series China 36/9 37.5 59 CD+Marrow NICE 5
Cao B 2010 Case series China 37/18 39.8 61 CD+A.B NICE 5
Yang J 2010 Case series China 50/5 35 85 CD NICE 5
Zhao Y 2011 Case series China 16/6 Range (16–51) 25 CD NICE 6
Chotivichit 2012 Case series Thailand 3/7 36.18 11 CD+Marrow NICE 6
Chotivichit 2014 Case series Thailand 18/14 31.9 34 CD+Marrow NICE 6
Chen XT 2015 Case series China 31/19 36.2 58 CD+A.B NICE 6
  1. Note: NA not available, CD core decompression, CD+Marrow core decompression combined with autologous bone marrow, CD+A.B core decompression combined with autologous bone, NICE National Institute for Clinical Excellence, NOS Newcastle-Ottawa Scale