Table 2 CCQ scores in subgroups (Healthy, At Risk and COPD (Stage I-III))

CCQ

Healthy (ex)smokers

At Risk (Stage 0)

Mild (Stage I)

Moderate A(Stage IIA)

Moderate B (Stage IIB)

Severe (Stage III)

Symptom

1.5^a

3.3^b

1.8^a,c

2.0^c,d

3.1^b,d

2.9^,b,c

(0.3–3.5)

(1.8–5.3)

(0.5–5.0)

(0.8–5.3)

(0.8–4.5)

(1.5–4.5)

Functional

0.8^a

1.4^b,c

0.3^a

1.4^b

1.5^b

2.6^c

state

(0.0–3.8)

(0.3–6.0)

(0.0–2.5)

(0.3–4.0)

(0.5–4.8)

(2.0–5.0)

Mental state

0.0^a

0.0^a,b

0.0^a

0.0^a,c

1.0^b

0.5^b,c

(0.0–3.0)

(0.0–3.5)

(0.0–1.0)

(0.0–4.5)

(0.0–5.0)

(0.0–3.0)

Total

0.8^a

2.0^b,c

1.0^a,d

1.3^b,d

1.9^b,c

2.5^c

(0.1–3.3)

(0.8–5.2)

(0.2–2.5)

(0.5–4.3)

(0.9–4.7)

(1.7–4.3)