“SAH-RISK”: Risk factors for subarachnoid haemorrhage (SAH) - a descriptive and comparative study using electronic health records by Harrison, C, Taquet, M, Luciano, S, Hatch, R, Bedford, J, Watkinson, P, Harrison, P, Rowland, M

“…Loss of the protective effects of oestrogen in the post-menopausal state has been proposed, but studies comparing hormone replacement therapy (HRT) exposure vs. no HRT exposure on SAH incidence draw conflicting conclusions (6, 7). …”