Eight triggers increased the risk for subarachnoid hemorrhage: coffee consumption (RR, 1.7; 95% CI, 1.2–2.4), cola consumption (RR, 3.4; 95% CI,1.5–7.9), anger (RR, 6.3; 95% CI, 4.6–25), startling (RR, 23.3; 95% CI, 4.2–128), straining for defecation (RR, 7.3; 95% CI, 2.9–19), sexual intercourse (RR, 11.2; 95% CI, 5.3–24), nose blowing (RR, 2.4; 95% CI, 1.3–4.5), and vigorous physical exercise (RR, 2.4; 95% CI, 1.2–4.2). The highest population-attributable risks were found for coffee consumption (10.6%) and vigorous physical exercise (7.9%).
Via Skeptical Scalpel.
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