Figure 2

(a) One-year and (b) 2-year mirror-image analyses, showing the change in admission days per patient per year (admission days per year after drug, minus admission days per year before drug, corrected for overall admission rates; see Figure 1 and text). The number of subjects contributing to the measurement for each drug is shown in parentheses (n), with mean age in years (at first use of the drug in question, i.e., in the middle of the period considered) and the number of males (M). Points show means and error bars show 95% CIs; filled symbols indicate that the CI excludes zero.