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Table 2 Difference of background factors or duration of corticosteroid administration between patients received low and high dose corticosteroids

From: Outcome of corticosteroid administration in autoimmune pulmonary alveolar proteinosis: a retrospective cohort study

Factors

Statistical methods

P-values

Age

Mann-Whitney U test

0.737

Gender

χ2 test

0.200

Disease severity score

χ2 test

0.266

Smoking history

χ2 test

0.594

Dust exposure history

χ2 test

0.916

Dyspnea

χ2 test

0.886

Cough

χ2 test

0.870

Duration

Mann-Whitney U test

0.114

  1. Background data were collected before the start of corticosteroid therapy. Duration was the serial days of corticosteroid administration. “High” and “low” dose of corticosteroids were described as Dosage and duration of corticosteroid therapy in results