Volume 30, Number 1—January 2024
Research
Population-Based Study of Pertussis Incidence and Risk Factors among Persons >50 Years of Age, Australia
Figure 1

Figure 1. Identification of pertussis cases in population-based study of pertussis incidence and risk factors among persons >50 years of age, Australia. A) Overall study population; B) patients with COPD/asthma. *Differentiation between confirmed, probable, and suspected cases was not possible because lab testing is not routinely being performed in all patients and cases were identified from the GP EMR based on the diagnosis label. COPD, chronic obstructive pulmonary disease; EMR, electronic medical record; GP, general practitioner.