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Table 1 Study scoring data abstraction form used to score all original studies independently

From: Enteral glutamine supplementation in critically ill patients: a systematic review and meta-analysis

 

Score

0

1

2

Randomization

–

Not concealed or not sure

Concealed randomization

Analysis

Other

–

Intention to treat

Blinding

Not blinded

Single-blind

Double-blind

Patient selection

Selected patients or unable to tell

Consecutive eligible patients

–

Comparability of groups at baseline

No or not sure

Yes

–

Extent of follow-up

<100 %

100 %

–

Treatment protocol

Poorly described

Reproducibly described

–

Cointerventions

Not described

Described but not equal or not sure

Well described and all equal

Outcomes

Not described

Partially described

Objectively defined