Table 2—

Rate ratio and rate difference of asthma death, among subjects aged 5–34 yrs in Japan during 1987–1999, associated with leukotriene receptor antagonist (LTRA) and inhaled corticosteroid use

RR#95% CIRD95% CI
Inhaled corticosteroids0.960.95–0.97‐0.29−0.35–−0.23
Leukotriene receptor antagonists0.800.76–0.83‐1.29−1.51–−1.07

  • RR: rate ratio

  • RD: rate difference

  • CI: confidence interval

  • #: RR of asthma death per additional 1 million 25-day treatment courses of inhaled corticosteroids or LTRAs

  • : RD of asthma deaths per million people per year associated with every additional 1 million 25-day treatment courses of inhaled corticosteroids or LTRAs