Supplementary Table 1.

Included and excluded studies.

Clinical outcomes and biomarkers	Studies were identified and screened [n]	Studies were excluded according to title, abstract or full text [n]	Studies were included [n]
Platelet count	285	252	33 approved articles with totally 45 enrolled data for meta-analysis
Mean platelet volume	140	125	15 approved articles with totally 19 enrolled data for meta-analysis
Platelet distribution width	11	9	2 approved articles with totally 3 enrolled data for meta-analysis
Beta thromboglobulin	66	51	15 approved articles with totally 22 enrolled data for meta-analysis
Platelet factor 4	54	44	10 approved articles with totally 16 enrolled data for meta-analysis
P-selectin	115	97	18 approved articles with totally 24 enrolled data for meta-analysis