Benefits of post-operative oral protein supplementation in gastrointestinal surgery patients: A systematic review of clinical trials

Table 2 Outcomes of quality assessment, described for individual trials

	Smedley et al[8]	Saluja et al[10]	Beattie et al[13]	MacFie et al[9]	Jensen et al[5]	Keele et al[11]	Rana et al[12]
Was the treatment adequately concealed prior to allocation?	2	0	2	0	0	0	2
Were candidates who withdrew included in analysis?	0	No withdrawals	0	0	0	0	1
Were the assessors blinded?	0	0	0	0	2		0
Were treatment and control groups comparable at entry?	2	2	0	2	1	2	2
			Specific mention of “lack of detail on patients at entry”		Specific mention of error “in the randomisation process”
Were care programmes otherwise identical?	2	2	2	2	2	2	2
Were the inclusion and exclusion criteria clearly defined?	2	2	2	2	2	2	2
Were the interventions clearly defined?	2	2	2	1	1	2	2
Were the participants blind to assignment after allocation?	0	0	0	0	0	0	0
Were the treatment providers blinded to allocation status?	0	0	0	0	0	0	0
Was duration of surveillance appropriate?	1	1	2	2	1	1	0