A major new study has found a notable connection between untreated sleep apnea and an increased risk of Parkinson’s disease. A team of researchers from Oregon Health and Science University (OHSU) studied more than 11 million veterans aged 40 and older who did not already have Parkinson’s disease. Some of them had been diagnosed with obstructive sleep apnea, a condition in which breathing repeatedly stops and starts during sleep. The researchers then tracked who went on to develop Parkinson’s over an average of nearly five years. They also examined veterans who began continuous positive airway pressure (CPAP) therapy within two