Table 1 Characteristics of study population.

From: Overuse of reliever inhalers and associated healthcare utilization of asthma patients

Variable Refilled ≥ 3 prescriptions of canisters of relievers annually Refilled < 3 prescriptions of canisters of relievers annually P value
n (%) 264 (27%) 713 (73%)  
% Male 45.1 37.9 0.041a
Ageb 46.2 ± 9.3 (47, 26–61) 44.1 ± 9.8 (44, 23–61) 0.003c
Disease durationb 15.1 ± 3.5 (14, 6–41) 14.7 ± 4.6 (14, 6–46) 0.014c
Hypertension (%) 25.0 19.6 0.068a
Diabetes (%) 19.3 20.1 0.797a
IHD (%) 4.9 3.5 0.309a
Obesity (%) 40.9 36.5 0.203a
Kidney disease (%) 7.6 5.2 0.158a
Liver disease (%) 2.7 2.5 0.911a
CVA (%) 1.5 2.0 0.644a
Charlson comorbidity index b 2.3 ± 1.2 (2, 1–6) 2.1 ± 1.2 (2, 0–9) 0.034c
Supplementary health insurance coverage (%) 83.0 73.6 0.002a
  1. IHD, ischemic heart disease; CVA, cerebrovascular accident.
  2. aChi-square test.
  3. bValues are mean ± SD (median, min–max).
  4. cMann-Whitney U test.