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Table 4 Incident rates for severe exacerbations and purchases of systemic corticosteroids or antibiotics during follow-up stratified by respiratory hospitalizations in history

From: Exacerbations and healthcare resource utilization among COPD patients in a Swedish registry-based nation-wide study

Stratifying variable: Number of respiratory hospitalizations in historya Severe exacerbations Systemic corticosteroids Systemic antibiotics
0 0.15 (0.15-0.16) 1.05 (1.04-1.05) 1.26 (1.25-1.27)
1-2 0.74 (0.72-0.76) 2.48 (2.45-2.51) 2.03 (2.01-2.06)
3-5 2.29 (2.22-2.37) 4.57 (4.47-4.68) 3.18 (3.09-3.28)
>5 5.56(5.29-5.83) 8.38 (8.05-8.72) 4.53 (4.29-4.78)
  1. aOne year prior to follow-up. Incidence rates presented by mean value and 95% confidence interval