Fig. 1From: The diagnostic value of homocysteine for the occurrence and acute progression of chronic obstructive pulmonary diseaseComparsion of Hcy levels among different groups. a Hcy levels in subjects of Non-AECOPD group, AECOPD group and control group. ***compared with control group, P<0.001; ### compared with Non-AECOPD group, P<0.001. b Hcy level in patients of GOLD grade A, B and CBack to article page