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Table 2 Critical appraisal results of quasi-experimental studies

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

% Yes

Chalandon et al. 1999 [48]

Y

Y

U

Y

N/A

Y

Y

Y

Y

87.5

Chang et al

2018 [45]

Y

N

Y

Y

N/A

Y

Y

Y

Y

87.5

Da Ponte et al. 2005 [20]

Y

Y

N

Y

N/A

Y

Y

Y

Y

87.5

Garancini et al. 2013 [21]

Y

U

Y

Y

N/A

U

Y

Y

Y

75.0

Paglino et al

2004[46]

Y

N

U

Y

N/A

U

Y

Y

Y

62.5

Pruss et al

2004[47]

Y

N

U

Y

N/A

Y

Y

Y

Y

75.0

Uhlmann et al. 2001[44]

Y

N

U

Y

N/A

U

Y

Y

Y

62.5

Wang et al

2012[19]

Y

N

U

Y

N/A

U

Y

Y

Y

62.5

Total %

100.0

25.0

25.0

100.0

N/A

50.0

100.0

100.0

100.0

 
  1. Y yes, N no, U unclear, NA not applicable
  2. JBI critical appraisal checklist for quasi-experimental studies (nonrandomized experimental studies): Q1 is it clear in the study what is the ‘cause’ and what is the “effect” (i.e., there is no confusion about which variable comes first)? Q2 were the participants included in any comparisons similar? Q3 were the participants included in any comparisons receiving similar treatment/care, other than the exposure or intervention of interest? Q4 was there a control group? Q5 were there multiple measurements of the outcome both pre and post the intervention/exposure? Q6 was follow-up complete and if not, were differences between groups in terms of their follow up adequately described and analyzed? Q7 were the outcomes of participants included in any comparisons measured in the same way? Q8 were outcomes measured in a reliable way? Q9 was appropriate statistical analysis used?