"Older adults are often excluded from clinical trials."
The study included 106 young adults aged 18–45 years.
It has long been accepted they can affect mental health and quality of life. But concern is growing they can lead to heart and circulatory illnesses.
"These three studies show worrying associations between obstructive sleep apnea and important diseases that affect survival and quality of life."
The increased risks were apparent from the second year after cancer diagnosis.
Infected patients were more likely to be diagnosed with life-threatening illnesses in the next three months.
The University of Pennsylvania team described the findings as "notable."
Beer is the most popular alcoholic beverage in the world.
The study found individuals who failed to pay student debt between young adulthood and early mid-life were more likely to develop cardiovascular disease.
It was correct 70 to 80 percent of the time - offering hope of a second referral mechanism for in-depth cardiovascular investigation.