Table 2 Characteristics of included studies
Author, year | Study design | Total Sample | Diagnose | Age | BMI | Sample | The included surgery | Diagnostic criteria | Â |
|---|---|---|---|---|---|---|---|---|---|
Mohammad 2018 | Retrospective study | n = 452 | Sarcopenia | 62 (11.3) | 23 [22–28] | n = 113 | Emergency laparotomy surgery | Using CT to assess the psoas muscle at the L3 level |  |
|  |  |  | No sarcopenia | 55 (9.1) | 25 [23–29] | n = 339 |  |  |  |
Colin 2021 | Retrospective study | n = 80 | Sarcopenia | 65.7(median 67.5) | UK | n = 20 | Emergency laparotomy surgery | Using CT to assess the psoas muscle at the L3 level |  |
|  |  |  | No sarcopenia | 59.6(median 60.0) | UK | n = 60 |  |  |  |
Trotter 2018 | Retrospective study | n = 248 | Sarcopenia | 72 (15.7) | 24.4 (6.1) | n = 61 | Emergency laparotomy surgery | Using CT to assess the psoas muscle at the L3 level |  |
|  |  |  | No sarcopenia | 70 (16.0) | 25.6 (6.6) | n = 187 |  |  |  |
Matsushima 2017 | Retrospective study | n = 89 | Sarcopenia | 54 [50–62] | UK | n = 32 | Acute colonic diverticulitis | Using CT to assess the psoas muscle at the L3 level |  |
|  |  |  | No sarcopenia | 44 [36–52] | UK | n = 57 |  |  |  |
Samer 2019 | Retrospective study | n = 283 | Sarcopenia | 78.92(7.66) | UK | n = 73 | Emergency laparotomy surgery | Using CT to assess the psoas muscle at the L3 level |  |
|  |  |  | No sarcopenia | 77.56(7.75) | UK | n = 210 |  |  |  |
Rebecca 2016 | Retrospective study | n = 593 | Sarcopenia | 65.65(15.68) | 23.69(5.53) | n = 197 | Emergency laparotomy surgery | Using CT to assess the psoas muscle at the L4 level |  |
|  |  |  | No sarcopenia | 58.14(16.22) | 29.67(8.01) | n = 396 |  |  |  |
Du 2014 | Retrospective study | n = 100 | Sarcopenia | 84.3(3.9) | 24 [22–27] | n = 73 | Emergency general surgical operation | Using CT to assess the psoas muscle at the L3 level |  |
|  |  |  | No sarcopenia | 83.6(2.9) | 25 [24–28] | n = 27 |  |  |  |
Brandt 2019 | Retrospective study | n = 150 | Sarcopenia | UK | UK | n = 38 | Emergency laparotomy surgery | Using CT to assess the psoas muscle at the L3 level |  |
|  |  |  | No sarcopenia | UK | UK | n = 112 |  |  |  |
Lisa 2018 | Retrospective study | n = 967 | Sarcopenia | 70.3(14.7) | 25.0(5.6) | n = 241 | Acute care surgery | Using CT to assess the psoas muscle at the L3 level |  |
|  |  |  | No sarcopenia | 61.2(16.8) | 30.7(8.7) | n = 726 |  |  |  |
Samantha 2021 | Retrospective study | n = 536 | Sarcopenia | 75 [68–81] | 23.4 [20.2–27.1] | n = 241 | Emergency laparotomy surgery | Using CT to assess the psoas muscle at the L3 level |  |
|  |  |  | No sarcopenia | 68 [54–77] | 26.2 [22.7–30.1] | n = 726 |  |  |  |
Rangel 2016 | Retrospective study | n = 297 | Sarcopenia | 78 [74–84] | 22 [20–27] | n = 75 | Acute abdominal surgery | Using CT to assess the psoas muscle at the L3 level |  |
|  |  |  | No sarcopenia | 78 [74–83] | 27 [24–31] | n = 222 |  |  |  |