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Table 1 Study characteristic and demographics of included patients (n no. of patients, NR not reported, SD standard deviation)

From: The association of low serum albumin level with severe COVID-19: a systematic review and meta-analysis

Study, yearCountryLanguageHospitalStudy periodTotal patientsMean/median ageFemale gender,n (%)Severe patients#, n (%)Serum albumin level, mean (SD) g/dL
SevereNon-severe
Huang, 2020 [2]ChinaEnglishJinyintan HospitalDec 16 to Jan 2414911 (26.8%)13 (31.7%)2.83 (0.24)3.4 (0.27)
Chen (1), 2020 [3]ChinaEnglishTongji HospitalJan 13 to Feb 28274NRNR113 (41.2%)3.03 (0.06)3.65 (0.26)
Liu (1), 2020 [4]ChinaEnglishShenzhen Third People’s HospitalJan 11 to Jan 211258.94 (33.3%)6 (50.0%)3.77 (0.25)4.43 (0.34)
Chen (2), 2020 [5]ChinaEnglishTongji HospitalDec to Jan 2721564 (19.0%)11 (52.4%)3.02 (0.24)3.73 (0.22)
Mo, 2020 [6]ChinaEnglishZhongnan HospitalJan 1 to Feb 51555469 (44.5%)92 (59.4%)3.6 (0.31)3.9 (0.27)
Wan, 2020 [7]ChinaEnglishChongqing University Three Gorges HospitalJan 23 to Feb 81354763 (46.7%)40 (29.6%)3.59 (0.26)4.52 (0.27)
Liu (2), 2020 [8]ChinaChineseMulticenterJan 23 to Feb 83238.512 (37.5%)4 (12.5%)3.55 (0.44)4.05 (0.34)
Liu (3), 2020 [9]ChinaChineseJianghan University Affiliated HospitalJan 10 to Jan 31303520 (66.7%)4 (13.3%)3.5 (0.21)4.2 (0.28)
Liu (4), 2020 [10]ChinaEnglishMulticenterDec 30 to Jan 15783839 (50.0%)11 (14.1%)3.66 (0.43)4.13 (0.33)
Zhang, 2020 [11]ChinaEnglishZhongnan HospitalJan 18 to Feb 2211549.5266 (57.4%)31 (30.0%)3.44 (0.31)4.04 (0.28)
Zhou, 2020 [12]ChinaEnglishNinth Hospital of NanchangJan 28 to Feb 61741.711 (64.7%)5 (29.4%)4.6 (0.28)4.49 (0.27)
  1. #Respiratory distress (rate ≥ 30/min, oxygen saturation ≤ 93% at rest and/or PaO2/FiO2 ≤ 300 mmHg), ICU admission and/or death