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Table 3 Details of follow-up visits

From: A prospective study of salvational intervention with ICS/LABA for reducing chronic obstructive pulmonary disease exacerbation under severe air pollution (SIRCAP) in Beijing: protocol of a multi-center randomized controlled trial

Follow-up Visit

Baseline(V1)

Before randomize(V2)

The first time after randomization(V3)

The second time after randomization(V4)

The third time after randomization(V5)

The fourth time after randomization(V6)

Screening period

4 weeks ± 1 day after washout period (in demand)

6 months ± 3 days after randomization

12 months ± 3 days after randomization

18 months ± 3 days after randomization

24 months ± 3 days after randomization

Informed consent

x

     

Basic information

x

     

Alteration of basic information

 

x

x

x

x

x

History of COPD

x

     

Criteria

x

     

Wash-out

x

     

SGRQ

x

x

x

x

x

x

CAT

x

x

x

x

x

x

mMRC

x

x

x

x

x

x

BODE

x

x

x

x

x

x

AECOPD questionnaire

x

x

x

x

x

x

Physical examination

x

x

x

x

x

x

Lung function test

x

x

x

x

x

x

6 min walk time, 6MWT

x

x

x

x

x

x

Arterial blood gas analysis

x

    

x

Other medication

x

x

x

x

x

x

Adverse events report

 

x

x

x

x

x