Fig 4 Risk of ischaemic stroke in women compared with men in relation to risk factors in CHADS₂ and CHA₂DS₂-VASc schemes. All interactions modelled within the multivariable primary Cox regression, except CHADS₂ (in which only sex and CHADS₂ were included in the model). Interaction between sex and age was significant when age was included as a continuous variable in the model