Table 2. Comparison of main demographic, clinical and lung function characteristics (%, mean±SD or median [IQR]) in patients with a normal (<30ml/yr) or increased (≥30ml/yr) rate of FEV1 decline, both at recruitment and end of six years follow-up.
Among variables included in Table 1, only those with p value < 0.05 in the Bivariate analysis are shown.
| FEV1 decline < 30 ml/yr | FEV1 decline ≥30 ml/yr | p value | |
|---|---|---|---|
| n = 50 (27%) | n = 138 (73%) | ||
| -14.6 [5.0/-24.0] ml/yr | -67.8 [-49.7/-99.2] ml/yr | <0.001 | |
| Toxic habits | |||
| Alcohol abuse Recruitment |
0.0% | 6.5% | 0.017 |
| Follow-up | 10.0% | 23.2% | 0.044 |
| Respiratory data | |||
| SGRQ total score Recruitment |
2.7 [1.7–13.9] | 8.8 [3.5–19.1] | 0.012 |
| Follow-up | 6.1 [0–16.9] | 8.3 [3.3–18.3] | 0.056 |
| FEV1-postBD, % ref. Recruitment |
90.0±14.2 | 96.3±13.5 | 0.006 |
| Follow-up | 95.2±13.5 | 88.4±14.8 | 0.005 |
SGRQ: St. George's Respiratory Questionnaire.