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Table 1

From: Efficacy and safety of erythropoietin for traumatic brain injury

Study/Year

Country

Study design

No. of patients

Mean age, y

Male patients, %

EPO vs. Control

Clinical Setting

Interventions

Time from trauma to intervention

Control

Follow-up Duration

Outcome Measures

Nirula et al, 2010 [25]

USA

Single-center, double-blind RCT

16

36.6 ± 20.7

68.6

11 vs. 5

Severe or Moderate TBI: Blunt trauma patients with evidence of TBI on CT, GCS < 13

EPO 40,000 IU IV

Within 6 h

Equal volume 0.9% NaCl

Discharge from Hospital or dead

Serum s-100B, NSE levels, ICP values, adverse events

Abrishamkar et al, 2012 [24]

Iran

double-blind RCT

54

26.3 ± 5.2

100

27 vs. 27

Severe TBI w/DAI: GCS 4–8, exclude hemorrhage

rhEPO 2000 IU SC for six doses in two weeks (on days: 2, 4, 6, 8 and 10)

Average time was 5 h

Equal volume 0.9% NaCl

Discharge from Hospital or dead

Mean GOS score, length of hospital stay, mortality

Robertson et al, 2014 [26]

USA

Multie-center, double-blind RCT

200

32.9 ± 17.6

86.5

102 vs. 98

TBI: Closed head injury who were unable to follow commands, Glasgow Coma Scale score formotor component ≤5

Regimen 1: EPO 500 IU/kg per dose IV,1 dose given within 6 h of injury followed by 2 additional doses given every 24 h; regimen 2: EPO 1 dose given within 6 h of injury

Within 6 h

Equal volume 0.9% NaCl over 2 min for each dose

6 months

GOS score, DRS Score, adverse events

Aloizos et al, 2015 [23]

Greece

Single-center, open-label RCT

42

36.7 ± 9.1

92.9

24 vs. 18

Severe TBI: Blunt head trauma, GCS < 9, or hypotension (systolic blood pressure < 100 mmHg)

EPO 10,000 IU SC for 7 consecutive days

Within 6 h

No placebo treatment

6 months

GOS-E Score, length of ICU stay, adverse events

Nichol et al, 2015 [21]

Australia, New Zealand, France, Germany, Finland, Ireland, and Saudi Arabia

Multie-center, double-blind RCT

606

33.8 ± 18.8

83.3

305 vs. 298

Severe or moderate TBI: non-penetrating traumatic brain injury (GCS 3–12)

Epoetin alfa 40,000 IU SC once per week for a maximum of three doses

Within 24 h

Equal volume 0.9% NaCl, once per week for a maximum of three doses

6 months

GOS-E Score, adverse events

Li et al, 2015 [20]

China

Single-center, open-label RCT

159

42.3 ± 9.9

61.6

78 vs. 80

Severe TBI: head trauma plus the worst initial GCS of 7 or less on arrival.

rhEPO subcutaneous injection on the admission day (within2 h of admission), and on day 3,6,9 and 12 after admission, daily dose of 100 units/kg (average 5999 units)

within 5 h

received the same volumes of subcutaneous normal saline on the admission day and on day 3,6,9 and 11 after admission

2 months

GOS score, Serum s-99B, NSE levels, Blood pressure,hemoglobin levels, adverse events

Bai et al, 2015 [22]

China

Single-center, open-label RCT

120

43.8 ± 11.1

70.8

60 vs. 60

Severe TBI: GCS score less than 8

rhEPO 6000 IU subcutaneous injection on the admission day (within 2 h of admission), and on day 3,5,10 and 15 after admission

NR

received the same volumes of subcutaneous normal 0.9% saline on the same time

10 weeks

GOS score, mortality, adverse events

  1. EPO Erythropoietin; TBI Traumatic brain injury; GCS Glasgow Coma Scale; GCS-E Extended Glasgow Coma Scale; IU International unit; IV Intravenous; RCT Randomized controlled trial; SC Subcutaneously; DAI Diffuse axonal injury; DRS Disability Rating Scale; FU Follow-up; ICP Intracranial pressure; ICU intensive care unit; NR Not reported; NSE Neuron specific enolase; rhEPO Recombinant human EPO
  2. *Age was reported as median (range) in the studies of Nichol et al., 2015, and Robertson et al., 2014; age was reported as mean ± SD in the studies of Bai et al. 2018, Li et al. 2016, Nirula et al., 2010, Aloizos et al., 2015, and Abrishamkar et al., 2012