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Table 1 Follow-up statistics and characteristics of study population

From: Extent, trends, and determinants of controller/reliever balance in mild asthma: a 14-year population-based study

Variable Cohort
Total sample 195,941
Patient years 1,827,150
Female; N (%) 114,673 (59.5%)
Age at index date; Mean (SD) 29.6 (9.55)
Socio-economic status; N (%)
 Quintile 1 19,014 (9.7%)
 Quintile 2 26,332 (13.5%)
 Quintile 3 35,420 (18.2%)
 Quintile 4 47,858 (24.6%)
 Quintile 5 64,326 (33%)
 Unknown 1824 (0.9%)
Follow up years; Mean (SD) 10.7 (4.95)
Ratio of ICS to total asthma medications; Mean (SD) 0.44 (0.400)
Suboptimal use of ICS (< 50%) 373,911 (48,8%)
Inappropriate use of SABAs; N (%) 55,414 (7.2%)
  1. ICS inhaled corticosteroids, SABA Short-acting beta agonist, SD Standard deviation