Main characteristics of the population at index event in relation to the three study groups.
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https://figshare.com/articles/dataset/_Main_characteristics_of_the_population_at_index_event_in_relation_to_the_three_study_groups_/1087440
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资源简介：
Group A: patients with at least one severe exacerbation of chronic obstructive pulmonary disease (E-COPD)in the three-year pre-index period; Group B: patients with only moderate E-COPD in the three-year pre-index period; Group C patients without E-COPD in the three-year pre-index period.SD = standard deviation.
' % of the whole population.
'' COPD is not considered as a comorbidity.
1p<0.05 vs group A, 2 p<0.05 vs group B.
创建时间：
2014-06-27
