I think the actual correlation here is: Sleeping very little -indicates-> Stress and Anxiety -builds to-> Hypertension -leads to-> Stroke Major disturbances i

I think the actual correlation here is: Sleeping very little -indicates-> Stress and Anxiety -builds to-> Hypertension -leads to-> Stroke Major disturbances in sleeping habits - Insomnia or Excessive Sleeping - are themselves strongly indicative of Depression, another major marker in terms of the Anxiety->Hypertension->Stroke vector. So, to conclude: Yes, sleeping very little is probably correlated with health problems, but mostly because it indicates something else being very wrong.