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Stepwise multiple linear regression analysis of variables' relationships to the NN50 count and LF/HF ratio in OSAS patients
NN50 count: the number of pairs of adjacent RR intervals differing by more than 50 ms in the entire analysis interval, LF/HF ratio: Low frequency/high frequency ratio, OSAS: obstructive sleep apnea syndrome, SE: standard errors, DBP: diastolic blood pressure, AHI: Apnea-hyponea index, S2: stage 2 sleep
