Fig 1.
Flowchart illustrating the process of identifying individuals with possible chronic cough from Swedish registers.
NPR: National Patient Register; SPDR: Swedish Prescribed Drug Register; PC: Primary Care; ÖG: Östergötland; TBC: Tuberculosis; ACEi: Angiotensin Converting Enzyme inhibitor.
Fig 2.
Two Venn diagrams illustrating the number of individuals with possible chronic cough identified by cough medicine dispenses and/or cough diagnosis.
In turquoise individuals identified with ≥2 dispenses of relevant cough-medication in the Swedish Prescribed Drug Register, in yellow individuals with cough diagnosis (R05) a) the national cohort with cough diagnosis (R05) from the Swedish National Patient Register and b) the regional cohort with cough diagnosis (R05) from the National Patient Register and the primary care register.
Fig 3.
Distribution of age and gender for individuals with possible chronic cough in the national cohort.
Fig 4.
Proportion of individuals with possible chronic cough stratified by number of visits with a R05 diagnosis and below proportion of individuals with possible chronic cough stratified by number of cough medicines dispensations 2016–2018.
Table 1.
Characteristics of individuals with possible chronic cough.
Fig 5.
a) Individuals visiting cough relevant specialist clinics, stratified by number of visits per patient 2016–2018. b) Number of cough diagnosis recordings at cough relevant specialist clinics cough relevant clinics.
Fig 6.
History of chronic cough a) First identification of possible chronic cough in the 10 years-period prior inclusion in the national cohort. b) Number of years ‘active’ and diagnoses per active year. A patient is considered to have an ‘active’ cough year if they have drug dispenses or cough diagnosis recordings.
Table 2.
Number of individuals in possible chronic cough cohorts and background cohorts and prevalence for different age groups.