Table 2

Depressive and anxious symptoms of the study population
Variables Healthy controls COPD
I (n = 163) II (n = 460) III (n = 289) IV (n = 188) total
HADS-A
Total score 3.1 (0–12) 6.1(2–15) 6.3(4–17) 6.5(5–18) 7.0(6–19)b 6.7 (2–19)a
HADS-A ≥ 8 58 (5.3) 14(8.6) 70(15.2) 65(22.5) 52(27.7)b 201(18.3)a
HADS-D
Total score 3.3 (0–13) 5.8(3–15) 6.5(5–17) 6.8(5–18) 7.3(7–20)b 6.7(3–20)a
HADS-D ≥ 8 79(7.2) 25(15.3) 118(25.7) 123(42.6) 127(67.6)b 393(35.7)a
BODE index NA 2.4(1–6) 2.7(1–7) 3.3(1–8) 4.1(2–8)b 2.9(1–8)

HADS-A, HADS—anxiety; HADS-D,HADS—depression.

Values are expressed as the median (range) or number (%).

a p < 0.01 compared to healthy controls.

b p < 0.01 compared to mild-to-severe COPD.

Lou et al.

Lou et al. BMC Pulmonary Medicine 2012 12:53   doi:10.1186/1471-2466-12-53

Open Data