Exacerbation recurrence rates in patients with moderate to very severe COPD in the Netherlands: a real-life study

rate / PY (95% CI) rate / PY (95% CI) rate / PY (95% CI) AECOPD (overall) 0.63 (0.58-0.68) 1.09 (1.01-1.18) 1.33 (1.19-1.49) Moderate AECOPD 0.56 (0.52-0.62) 0.95 (0.88-1.03) 1.16 (1.03-1.31) Severe AECOPD 0.06 (0.05-0.08) 0.14 (0.11-0.17) 0.17 (0.12-0.23) Infective AECOPD 0.05 (0.04-0.07) 0.11 (0.09-0.14) 0.11 (0.07-0.15) AECOPD with Gram- negative organism 0.004 (0.001-0.010) 0.005 (0.001-0.011) 0.004 (0.000-0.017)