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Table 2 Excluded protocols and the reason for exclusions

From: Convalescent plasma therapy for COVID-19 patients: a protocol of a prospective meta-analysis of randomized controlled trials

Protocol number

Reason for exclusion

NCT04354831

Non-randomized study

NCT04353206

Single-arm study

NCT04345679

Single-arm study

NCT04372368

Single-arm study

NCT04333355

Single-arm study

NCT04412486

Single-arm study

NCT04355897

Single-arm study

NCT04390178

Single-arm study

NCT04321421

Single-arm study

NCT04343755

Single-arm study

NCT04397523

Single-arm study

NCT04384497

Single-arm study

NCT04388527

Single-arm study

NCT04344015

Single-arm study

NCT04383548

Single-arm study

NCT04420988

Single-arm study

NCT04363034

Single-arm study

NCT04389710

Single-arm study

NCT04338360

Single-arm study

NCT04397900

Retrospective study

NCT04409184

Retrospective study

NCT04360278

Single-arm study

NCT04358211

Single-arm study

NCT04352751

Single-arm study

NCT04408209

Single-arm study

NCT04389944

Single-arm study

NCT04360486

Single-arm study

NCT04348877

Single-arm study

NCT04343261

Single-arm study

NCT04392232

Single-arm study

NCT04384588

Single-arm study

NCT04356482

Single-arm study

NCT04374565

Single-arm study

NCT04384588

Single-arm study

NCT04374565

Single-arm study

NCT04377672

Single-arm study

NCT04332380

Single-arm study

NCT04357106

Single-arm study

NCT04354766

Non-randomized prospective cohort

NCT04327349

Single-arm study

NCT04407208

Single-arm study

NCT04361253

Children included

NCT04365439

Single-arm study

NCT04411602

Single-arm study

NCT04325672

Single-arm study

NCT04373460

Outpatient care

NCT04390503

Does not investigate population in question

NCT04375098

Does not investigate population in question

NCT04374526

Does not investigate population in question

NCT04323800

Does not investigate population in question

NCT04325672

Withdrawn

NCT04361253

Does not investigate the outcome in question

NCT04333251

Does not investigate the outcome in question

NCT04374370

Does not investigate the outcome in question

NCT04365439

Does not investigate the outcome in question

NCT04372979

Does not investigate the outcome in question

NCT04355767

Does not investigate the outcome in question