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Sleep apnea severity can change a lot from one night to the next. In a Wesper study of 149 adults and 1,184 home sleep tests, most patients changed severity category, and more than half of those with sleep apnea had a normal first night.
One patient took two home sleep tests and got no usable data from either. Here is what the research says about how often home sleep tests fail, why patients drop off after a failed test, and what helps.
