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Table 1 Schedule of follow-up procedures, including a fourth year of follow-up according to the Steering Committee’s 2012 recommendation

From: Multi-center, randomized, placebo-controlled trial of nocturnal oxygen therapy in chronic obstructive pulmonary disease: a study protocol for the INOX trial

 

Time line (months)

0

4

8

12

16

20

24

28

32

36

40

44

48

Consent form

            

Baseline/follow-up general health information

  

  

  

  

Nocturnal oxymetry

            

Pulse oxymetry

 

 

 

Arterial blood gas

a

a

a

a

a

a

a

a

a

a

a

Pulmonary function tests (spirometry, lung volumes and DLCO)

  

  

  

  

Quality-of-life questionnaires

  

  

  

  

Health Care questionnaire (follow-up call or visit)b

 

Home visits for compliancec

 

  1. aDepending on the result of the arterial saturation in oxygen measured by pulse oximetry
  2. bHealth care utilization is measured through telephone contacts with patients every 2 months
  3. cHome visits are performed by home care service provider staff