Table 2

Summary of outcomes, follow-up and event rates for patients in the cohort

OutcomeNumber (%) of patients with outcomeEventsFollow-upEvent rate per 1000 person years (95% CI)
Total number of eventsRange per personMedian time in years (95% CI)*Total person years
First admission for AECOPD1756 (25.1)1756NA4.5 (4.3 to 4.6)27377.864.1 (61.2 to 67.2)
All admissions for AECOPD†1756 (25.1)39371–314.5 (4.3 to 4.6)31088.9126.6 (122.7 to 130.7)
Readmission within 14 days of previous discharge235 (3.4)4481–25
Death1820 (26.0)1820NA5.1 (5.0 to 5.2)31088.958.5 (55.9 to 61.3)
GP-treated AECOPD‡2718 (38.8)10 3991–485.2 (5.1 to 5.4)31088.9334.5 (328.1 to 341.0)
  • *Estimation of median follow-up time using the reverse Kaplan-Meier method.

  • †Readmissions for AECOPD occurring within 14 days of discharge from a previous AECOPD admission were not considered to be new admissions and were not included in the modelling.

  • ‡GP-treated exacerbation defined as prescriptions of antibiotics (amoxicillin, cefalexin, ciprofloxacin, clarithromycin, co-amoxiclav, doxycycline or erythromycin) and oral prednisolone within 7 days of each other and more than 21 days since a previous prescription.

  • AECOPD, acute exacerbation of chronic obstructive pulmonary disease; GP, general practitioner; NA, not applicable.