Importance of reporting quality: An assessment of the COVID-19 meta-analysis laboratory hematology literature

Table 1 Articles considered in the analysis

Ref.	Country1	No. of patients	Evaluated hematologic parameters
Published studies
Borges et al[11]	Multinational, predominantly China	59254	WBC, ANC, ALC, PLT, D-Dimer
Cao et al[12]	China	46959	WBC, ALC
Fu et al[13]	Not stated, likely all China	3600	WBC, ALC, PLT, D-dimer
Henry et al[14]	China, Singapore	2984	WBC, ANC, ALC, MONO, EOS, HGB, PT, PTT, D-dimer
Lagunes-Rangel[15]	China	828	Estimate of N/L ratio
Li et al[16]	China	1995	WBC
Lippi et al[17]	China, Singapore	1099	PLT
Rodriguez-Morales et al[18]	China, Australia	2874	WBC, ALC, HGB
Zhu et al[19]	China	3062	WBC, ALC, D-dimer
Preprint studies
Arabi et al[20]	China	50	WBC
Ebrahami et al[21]	China	2217	WBC, ANC, ALC, HGB, PLT, PT, PTT, D-Dimer
Han et al[22]	China	1208	ALC, ANC, PLT, PT, PTT, D-Dimer
Heydari et al[23]	China, S. Korea	49504	WBC, ANC, ALC, D-dimer
Ma et al[24]	China	53000	ALC, PLT, D-dimer
Nasiri et al[25]	China, Germany	4679	WBC, ANC, ALC, HGB, PLT
Pormohammad et al[26]	China	52251	WBC, ALC, ANC, PLT, HGB
Xu et al[27]	China	4062	WBC, ANC,ALC, PLT, D-dimer
Zhang et al[28]	Not stated, likely all China	275	WBC, ALC

¹Country of origin of patient population. WBC: White blood cell count; ANC: Absolute neutrophil count; ALC: Absolute lymphocyte count; PLT: Platelet count; MONO: Absolute monocyte count; EOS: Absolute eosinophil count; HGB: Hemoglobin; PT: Prothrombin time; PTT: Partial thromboplastin time; N/L: Neutrophil-to-lymphocyte.