The Clinical COPD Questionnaire Correlated with BODE Index-A Cross-Sectional Study

Table 2

GOLD stages of chronic obstructive pulmonary disease (COPD), BODE index score, and BODE quartiles in the 89 COPD patients.

Characteristic	Number of patients (%)
COPD GOLD stage
Stage I (FEV1* > 80% of predicted value)	12 (13.5)
Stage II (FEV1, 50–80% of predicted value)	36 (40.4)
Stage III (FEV1, 30–50% of predicted value)	32 (36)
Stage IV (FEV1 ≤ 30% of predicted value)	9 (10.1)
BODE index^†
0	15 (16.9)
1	16 (18.0)
2	11 (12.4)
3	10 (11.2)
4	9 (10.1)
5	12 (13.5)
6	6 (6.7)
7	6 (6.7)
8	2 (2.2)
9	2 (2.2)
10	0 (0)
BODE quartile^‡
1	42 (47.2)
2	19 (21.3)
3	18 (20.2)
4	10 (11.2)

* FEV1 denotes forced expiratory volume in one second. ^†See text for details of BODE; the higher the BODE index, the greater the risk of death. ^‡Quartile 1 referred to BODE score of 0 to 2, quartile 2 to 3 to 4, quartile 3 to 5 to 6, and quartile 4 to 7 to 10.