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Table 1 Baseline characteristics of the included studies

From: Left and right ventricular longitudinal strains are associated with poor outcome in COVID-19: a systematic review and meta-analysis

Author Design Sample Age (mean/median) Male (%) Hypertension (%) HF (%) CAD (%) CLD (%) Outcome NOS
Baycan et al. [16] Retrospective cohort 100 55.6 50 29 - - - Mortality 8
Bursi et al. [17] Retrospective cohort 49 65.7 63.3 49 6.1 22.4 12.2 Mortality 8
Croft et al. [6] Retrospective cohort 58 54.1 58.6 68.9 17.2 22.4 13.8 Mortality 6
Janus et al. [7] (letter) Retrospective cohort 31 64 - - - - - Mortality -
Kim et al. [15] Prospective–retrospective cohort 40 60 50 37.5 0 0 0.03 Severity 8
Lassen et al. [4] Prospective cohort 214 68.9 54.7 57 10.3 15.9 15 Mortality 8
Li et al. [8] Cohort 120 61 48 40 - 9.2 5 Mortality 9
  1. CAD coronary artery disease, CLD chronic lung disease, HF heart failure, NOS Newcastle Ottawa Scale