Single and unhappily married men are at 64% higher risk of dying from stroke

Men who were single in the 1960s were 64% more likely to suffer a fatal stroke over the next three decades than their married counterparts.

The risk of fatal stroke was also 64% higher in men who reported dissatisfaction with their marriages than in men who rated their marriages as successful.

That figure is comparable to the risk of fatal stroke faced by men with diabetes.

References:
Single Men Have Higher Risk of Stroke. WebMD.

Image source: CT scan slice of the brain showing a right-hemispheric ischemic stroke (left side of image). Wikipedia, GNU Free Documentation License.