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Table 1 Participant timeline

From: The effect of donation frequency on donor health in blood donors donating plasma by plasmapheresis: study protocol for a randomized controlled trial

 

Enrollment

Allocation

Post allocation

Follow-up

Timepoint (week)

 − 1

0

1–2

3–4

5–6

7–8

9–10

11–12

13–14

15–16

17–18

19–20

Enrollment:

 Eligibility screen

x

           

 Informed consent

x

           

 Allocation

 

x

          

Interventions:

 HFPDs: Plasmapheresis

  

xxx

xxx

xxx

xxx

xxx

xxx

xxx

xxx

  

 RFPDs: Plasmapheresis

  

x

x

x

x

x

x

x

x

  

 Controls: Blood donation

  

x

      

x

  

Assessments:

Baseline variables:

Outcome variables:

x

x

          

 Blood samples

  

x

x

x

x

x

x

x

x

x

x

 FFQ

          

x

 

 HSCL-25

 

x

        

x

 
  1. FFQ food frequency questionnaire, HSCL-25 Hopkins Symptom Checklist-25
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Trials

ISSN: 1745-6215