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Table 1 Characteristics of the enrolled studies

From: Effect of initial calorie intake via enteral nutrition in critical illness: a meta-analysis of randomised controlled trials

Study No. randomized Characteristics of patients BMI (SD) Mean APACHE II score (SD)
LE HE LE HE LE HE
Arabi et al. [21] 120 120 >18 years old 28.5 (7.4) 28.5 (8.4) 25.2 (7.5) 25.3 (8.2)
ICU >48 hours
Braunschweig et al. [22] 38 40 >18 years old 30.1 (8.9) 29.8 (9.3) 27.7 (7.9) 23.4 (9.3)
Medical or surgical ICU
ALI <24 hours
Charles et al. [23] 41 42 >18 years old 32.9 (2.0) 28.1 (0.9) 16.6 (0.9) 17.3 (0.8)
Artificial nutrition >48 hours
ICU >48 hours
Desachy et al. [24] 50 50 >18 years old 27 (5) 25 (3) 40 (11)1 42 (17)1
Medical or surgical ICU
Mechanical ventilation >72 hours
Peake et al. [25] 55 57 ≥18 years old 26.2 (6.4) 27.8 (7.9) 22 (8.9) 23 (9.1)
Enteral nutrition ≥2 days
Mechanical ventilation
Rice et al. [26] 98 102 ICU admission 29.2 (10.2) 28.2 (9.4) 26.9 (8.1) 26.9 (6.6)
Mechanical ventilation >72 hours
Rice et al. [27] 508 492 ICU admission 29.9 (7.8) 30.4 (8.2) 92 (28)2 90 (27)2
ALI <48 hours
Mechanical ventilation >72 hours
Taylor et al. [28] 41 41 Head injury necessitating mechanical ventilation N/A N/A 143 143
Glasgow Coma Scale >3
  1. 1Mean APACHE III score. 2Mean Simplified Acute Physiology Score II. 3Standard deviation was not reported. ALI, acute lung injury; APACHE, Acute Physiology And Chronic Health Evaluation; BMI, body mass index; HE, high-energy; LE, low-energy; N/A, not available; SD, standard deviation.