Table 3 Long term analysis: significant prognostic factors for composite event using univariate analysis (ITT population).
| Composite event | Selected subjects (N = 730) | p value* | ||
|---|---|---|---|---|
| No (N = 271) | Yes (N = 459) | |||
| Age (years) | 0.072 | |||
| <65 | 155 (40%) | 231 (60%) | 386 | |
| ⩾65 | 116 (34%) | 228 (71%) | 344 | |
| Number of AECBs in previous year | ⩽0.001 | |||
| 2–3 | 220 (42%) | 307 (58%) | 527 | |
| ⩾4 | 51 (25%) | 152 (75%) | 203 | |
| Bronchodilators | ⩽0.001 | |||
| No | 247 (40%) | 371 (60%) | 618 | |
| Yes | 24 (21%) | 88 (79%) | 112 | |
*χ2 test.
The full analysis including non‐significant risk factors is shown in table S4 available online at http://www.thoraxjnl.com/supplemental.