Fig. 3
From: The laboratory findings and different COVID-19 severities: a systematic review and meta-analysis
Forest plot showing pooled mean of CRP between groups according O2 therapy manner: (1) invasive ventilation group (pooled average of 48.83 mg/l, CI = [33.23, 64.42], p < 0.001), (2) non-invasive ventilation group (mean:42.40 mg/l), [ 27.99,56.81], p < 0.001), (3) no oxygen therapy group (pooled average of 44.59 mg/l), CI = [30.76, 58.43], p < 0.001)