Incidence rate ratio (IRR) of stroke in individuals receiving antiviral treatment for herpes zoster by time since treatment compared with individuals with no history of antiviral treatment in Danish adults 1995–2008.

*Person years in thousands.¤Adjusted for age, sex, and calendar period.#Test for homogeneity.* 统计单位为千人年（Person years）。¤ 已按年龄、性别及研究时段进行校正。# 齐性检验。