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Table 1 Study design of included studies from Nordic trauma research, 2005–2018

From: Trauma research in the Nordic countries, 1995–2018 – a systematic review

Study designNumber of studies, N (%)
Meta-analysis1 (0.1)
Randomised double-blinded controlled trials3 (0.4)
Randomised controlled trials13 (1.6)
Cohort505 (61.2)
Case-control35 (4.2)
Case series259 (31.4)
Case report10 (1.2)
Total825 (100)