Table 3 Negative binomial regression of age, smoking status and various measures of baseline COPD severity with the number of hospital admissions and exacerbations in the 12-month follow-up in the OPC data set
N=4400 | Hospital admissions in the next 12 months | Exacerbations in the next 12 months | ||
|---|---|---|---|---|
Incident rate ratio (95% confidence interval) | AIC | Incident rate ratio (95% confidence interval) | AIC | |
DOSE index | 1.50 (1.33–1.68) | 982 | 1.52 (1.46–1.57) | 8,913 |
ADO index | 1.23 (1.10–1.39) | 1,013 | 1.16 (1.12–1.20) | 9,352 |
Number of exacerbations in the 12 months before baseline | 1.14 (1.09–1.18) | 978 | 1.28 (1.26–1.31) | 8,671 |
FEV1% | 0.976 (0.966–0.986) | 1,001 | 0.987 (0.985–0.990) | 9,323 |
Smoking status: | 1,013 | 9,414 | ||
Never | 1.00 | 1.00 | ||
Ex | 1.17 (0.63–2.16) | 1.08 (0.88–1.32) | ||
Current | 0.47 (0.23–0.98) | 1.00 (0.88–1.32) | ||
MRC dyspnoea scale | 1.38 (1.14–1.68) | 1,015 | 1.28 (1.21–1.37) | 9,351 |
Age | 1.01 (0.99–1.03) | 1,025 | 1.00 (0.99–1.00) | 9,413 |
