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Table1 Illustration of BGAV scoring system

From: Rationale and design of REGULATE: an observational study protocol for relationship between plasma metabolome and the efficacy of systemic glucocorticoid in acute exacerbation of chronic obstructive pulmonary disease

Term Grade Definition
B: bronchodilator B1 Patients need short-acting β2 receptor agonists or nebulized ipratropium bromide
B2 The patient's dosage or frequency of β2 receptor agonists on the basis of B1 increased
B3 Patients need to use long-acting bronchodilators on the basis of B2
G: glucocorticoid G1 Patients need oral prednisone 30–40 mg/d
G2 The patient needs intravenous drip of glucocorticoid
A: antibiotics A1 The infection can be controlled by oral application of firstline antibacterial drugs, without upgrading antibiotic drugs
A2 The patient's use of antibacterial drugs in this course of treatment is upgraded or new antibacterial drug combination therapy is added
V: ventilation V1 The patient does not need mechanical ventilation and does not need to be admitted to the ICU
V2 The patient does not need mechanical ventilation and does not need to be admitted to the ICU
V3 The patient is admitted to the ICU