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Table 2 Distribution of the main topic categories in the 170 randomised controlled trials (RCTs); 142 published trials and 28 protocols registered on ClinicalTrial.gov

From: Outcomes used in randomised controlled trials of nutrition in the critically ill: a systematic review

Topics

Number of RCTs (%)

n = 170

Clinical nutrition strategy

69 (40)

 Strategies to optimise delivery and minimise risk of EN

36

 Early versus delayed nutrient intake

8

 Amount of EN prescribed

14

 EN versus PN

7

 Strategies to optimise delivery and minimise risk of PN

3

 PN versus standard care

1

Composition of clinical nutrition

66 (39)

 Composition of EN

30

 Composition of nutrition

21

 Composition of PN

15

Supplementation in clinical nutrition

35 (21)

 Supplemental glutamine

23

 Supplemental antioxidants

8

 Supplemental PN

3

 Vitamins

1

  1. EN enteral nutrition, PN parenteral nutrition