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A sleep study test, or polysomnography, is the gold standard for diagnosing sleep apnea. It monitors brain waves, oxygen levels, heart rate, and breathing patterns overnight. With growing demand, this test is now more accessible in urban centers. The sleep study test cost in Delhi typically ranges between ₹4,000 to ₹10,000, depending on whether it's a home-based or lab-based setup. Early diagnosis through a sleep study can significantly improve quality of life and reduce future health complications.