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Table 2 QUADAS-2 risk of bias assessment

From: Lung ultrasound for the diagnosis of pneumonia in adults: a systematic review and meta-analysis

Study Risk of bias Applicability concerns
  Patient selection Index test Reference standard Flow and timing Patient selection Index test Reference standard
Benci et al.[31] L ? ? L L ? L
Lichtenstein et al.[32] L L L L L L L
Lichtenstein et al.[33] L L L L L L L
Lichtenstein et al.[34] L L L L L L L
Parlamento et al.[35] L L L L L L L
Cortellaro et al.[21] L L L L L L L
Xirouchaki et al.[38] L L L L L L L
Reissig et al.[22] L L L L L L L
Testa et al.[36] L L L L L L L
Unluer et al.[37] L L L L L L L
  1. L: Low risk, ?: Unclear risk, H: High risk.