Table 2 COPD outcome predictors (n = 21), grouped by disease components.

Physiologic

- Obstruction (FEV ₁ as % from predicted)

14

- Blood oxygen (PaO2)

1

- Exercise maximum oxygen consumption

1

Biomarkers

- Interleukin-6

1

Physical

- BMI (length/weight2)

7

- Exercise tolerance (6MWD)

4

- Knee extensor strength

1

Medical history

- COPD duration

1

- (Rate of) exacerbation (unscheduled visits, emergency department visits, hospitalisation, intubation)

8

- History of cardiovascular disease

2

Demographics

- Age

5

- Gender

1

- Smoking status

1

- Influenza vaccination status

1

Signs & symptoms

- Dyspnoea (ATS, MRC score, GCRQ, and Fletcher)

9

- Quality of life (SGRQ)

2

- Health status (CRQ and ad hoc questionnaires)

2

- Respiratory symptoms like cough

2

Treatment

- COPD medication (including steroids and theophylline)

3

- Antibiotics

1

- Home oxygen

1