Table 1 Characteristics of the included studies
Author(s) (etc.) Year | Nations | Type of study | research period | Type of surgery | sample size | Number of men/women | Age (mean (SD); Range (years) | BMI (kg/m2) | Anaemia criteria | Number of preoperative anemia | Outcome |
|---|---|---|---|---|---|---|---|---|---|---|---|
Sandean et al. [28] | United Kingdom | A retrospective study | 2009–2017 | THA | THA:1095 | unspecified | 72 | unspecified |  < 130 g/L for men or < 115 g/L for women | 192 | 1 |
Xiong et al. [30] | China | A retrospective study | 2017–2021 | TKA | TKA:1005 | 208/797 | Anaemic group: 69.87 ± 8.60 Non-anaemic group: 69.87 ± 8.60 | Anaemia group: 24.87 ± 3.57 Non-anaemic group 25.81 ± 2.46 | Hb < 130 g/L for men or < 120 g/L for women | 342 | 1, 2, 8, 9 |
Sandean et al. [29] | United Kingdom | A retrospective study | 2016–2018 | TKA | TKA:2296 | 883/1413 | 72 | unspecified |  < 130 g/L for men or < 115 g/L for women | 350 | 1 |
Saleh et al. [27] | United Kingdom | A retrospective study | 2000–2001 | THA/TKA | THA:621 TKA:521 | unspecified | 68 | unspecified |  < 130 g/L for men or < 115 g/L for women | 210 | 1 |
Lasocki et al. [34] | French | A retrospective study | 2010–2011 | THA/TKA | THA:765 TKA:570 | 397/938 | 64 ± 12.3 | unspecified | Hb < 130 g/L for men and < 120 g/L for women | 217 | 1, 7, 10 |
Myers et al. [25] | United Kingdom | A retrospective study | 1999–2000 | THA | THA:225 | 137/88 | Anaemic group: 62 Non-anaemic group: 64 | unspecified |  < 130 g/L for men or < 115 g/L for women | 35 | 1, 2, 13 |
Jans et al. [1] | Denmark | A retrospective study | 2010–2011 | THA/TKA | THA:2702 TKA:2463 | 2229/2936 | 67 ± 11 | unspecified | Hb < 130 g/L for men and < 120 g/L for women | 662 | 1, 2, 3, 4, 7, 8, 10, 11 |
Lu et al. [14] | United States of America | A retrospective study | 2006–2014 | rTHA/rTKA | rTHA:3871 rTKA:2959 | 3814/3016 | Anaemia group: 68.1 ± 12.1 Non-anaemic group:67.9 ± 11.4 | Anaemia group: 31 ± 7 Non-anaemic group: 30.9 ± 8 | Hb < 130 g/L for men and < 120 g/L for women | 3415 | 1, 2, 3, 4, 5, 6, 8, 9, 10, 11 |
Lu et al. [14] | United States of America | A retrospective study | 2006–2014 | rTHA/rTKA | rTHA:1107 rTKA:1543 | 1364/1286 | Anaemia group: 64.3 ± 11.7 Non-anaemic group:66.3 ± 12 | Anaemia group: 31.9 ± 7.6 Non-anaemic group 31.6 ± 8 | Hb < 130 g/L for men and < 120 g/L for women | 1325 | 1, 2, 3, 4, 5, 6, 8, 9, 10, 11 |
Kasivisvanathan et al. [24] | United Kingdom | A retrospective study | 2004–2014 | rTHA/rTKA | rTHA:3021 rTKA:2366 | 2409/2978 | 70.1 ± 8.4 | unspecified | Hb < 130 g/L for men and < 120 g/L for women | 1956 | 1, 2, 3, 4, 8, 10, 12 |
Abdullah et al. [7] | Singaporean | A retrospective study | 2013–2014 | TKA | TKA:2394 | 579/1815 | 65.9 ± 8.0 | unspecified | Hb < 130 g/L for men and < 120 g/L for women | 567 | 1 |
Evans et al. [35] | Australia | A retrospective study | 2009.1–2009.7 | TJA | TJA:154 | 69/85 | 66.35 | unspecified | Hb < 130 g/L for men and < 120 g/L for women | 15 | 1, 8, 13 |
Wan et al. [40] | Sweden | A retrospective study | 2016–2018 | THA/TKA/ rTHA/rTKA | 881 | 533/348 | Anaemia group: 69.5 Non-anaemic group: 65.2 | unspecified | Hb < 130 g/L for men and < 120 g/L for women | 189 | 1, 5, 8, 10, 12 |
Gu et al. [17] | United States of America | A retrospective study | 2012–2017 | THA | THA:108 b,966 | 48,743/60223 | Anaemic group: 64.63 ± 10.715 Non-anaemic group: 68.01 ± 11.49 | Anaemia group: 29.9 ± 6.53 Non-anaemic group 30.5 ± 6.35 | Hb < 130 g/L for men and < 120 g/L for women | 14,751 | 1, 2, 3, 4, 6, 8, 9, 11, 12 |
Gu et al. [17] | United States of America | A retrospective study | 2012–2017 | TKA | TKA:184,077 | 69,415/114662 | Anaemic group: 66.34 ± 9.34 Non-anaemic group: 68.80 ± 9.84 | Anaemia group: 32.6 ± 7.16 Non-anaemic group 33.2 ± 6.84 | Hb < 130 g/L for men and < 120 g/L for women | 23,637 | 1, 2, 3, 4, 6, 8, 9, 11, 12 |
Greenky [31] | United States of America | A retrospective study | 2000–2007 | THA/TKA/ rTHA/rTKA | THA: 7230 TKA: 6371 rTHA: 1121 rTKA: 500 | 6494/8727 | Anaemic group: 65.92 ± 12.9 Non-anaemic group: 63.14 ± 12.2 | Anaemic group: 29.7 ± 8.32 Non-anaemic group 30.27 ± 10.7 | Hb < 130 g/L for men and < 120 g/L for women | 2991 | 1, 2, 3, 4, 5, 9, 10, 12 |
Rogers et al. [26] | United Kingdom | A retrospective study | unspecified | THA | THA:322 | 141/181 | 67 | unspecified | Male and female Hb ≤ 120 g/L | 26 | 1 |
Duarte et al. [39] | Brazilian | A retrospective study | 2017–2020 | TJA | TJA:234 | 99/134 | Anaemic group: 74.06 ± 1.59 Non-anaemic group: 68.84 ± 1.29 | unspecified | Hb < 130 g/L for men and < 120 g/L for women | 72 | 1, 7, 8, 10, 11, 12 |
Schatz et al. [37] | German | A retrospective study | 2019–2020 | TKA | TKA:341 | 147/126 | 71.3 ± 9.0 | Anaemia group: 26.7 ± 4.6 Non-anaemic group 28.4 ± 4.6 | Hb < 130 g/L for men and < 120 g/L for women | 42 | 1, |
Abdullah et al. [33] | Singaporean | A retrospective study | 2013–2014 | TKA | TKA:1994 | 473/1521 | 67.3 | unspecified | Hb < 130 g/L for men and < 120 g/L for women | 445 | 1, 3, 8, |
Bailey et al. [38] | Canadian | A retrospective study | 2016–2017 | THA/TKA | THA:2283 TKA:2457 | 2417/2967 | Anaemic group: 70.4 ± 11.4 Non-anaemic group: 63.7 ± 11.7 | Anaemia group: 30.6 ± 6.7 Non-anaemic group 31.1 ± 7.0 | Hb < 130 g/L for men and < 120 g/L for women | 817 | 1, 5, 6, 8, 11 |
Viola et al. [32] | United States of America | A retrospective study | 2000–2013 | THA/TKA/ rTHA/rTKA | THA: 6320 TKA: 5619 rTHA: 1012 rTKA: 612 | 5962/7601 | Anaemia group: 66.1 ± 12.4 Non-anaemic group: 63.1 ± 11.7 | Anaemic group: 29.9 ± 6.9 Non-anaemic group: 30.3 ± 6.4 | Hb < 130 g/L for men and < 120 g/L for women | 2576 | 1, 8, 10, 12 |
Meybohm et al. [36] | German | A retrospective study | 2017–2018 | THA/TKA | THA:4813 TKA:3162 | 3382/4593 | 70 | unspecified | Hb < 130 g/L for men and < 120 g/L for women | 1372 | 1, 10, 12 |