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Table 1 Critical appraisal results of the randomized controlled trial study

From: Effect of post-storage filters vs. pre-storage filters for leukoreduction of blood components on clinical outcomes: a systematic review and meta-analysis

Study

Q1

Q2

Q3

Q4

Q5

Q6

Q7

Q8

Q9

Q10

Q11

Q12

Q13

% Yes

van Watering et al. 1998 [23]

Y

Y

Y

U

Y

U

Y

Y

Y

Y

Y

Y

Y

84.6

  1. Y = yes, N = no, U = unclear
  2. JBI critical appraisal checklist for randomized controlled trials: Q1 was true randomization used for the assignment of participants to treatment groups? Q2 was allocation to treatment groups concealed? Q3 were treatment groups similar at baseline? Q4 were participants blind to treatment assignment? Q5 were those delivering treatment blind to treatment assignment? Q6 were outcome assessors blind to treatment assignment? Q7 were treatment groups treated identically other than the intervention of interest? Q8 = Was follow-up complete, and if not, were strategies to address incomplete follow-up utilized? Q9 were participants analyzed in the groups to which they were randomized? Q10 were outcomes measured in the same way for treatment groups? Q11 were outcomes measured in a reliable way? Q12 was appropriate statistical analysis used? Q13 was the trial design appropriate, and any deviations from the standard RCT design (individual randomization, parallel groups) accounted for in the conduct and analysis of the trial?