 Nocturnal HTN: increased absolute level of night time systolic andor diastolic BP 12070 mmHg.19 Dipping pattern is defined as daytime-nighttime BPdaytime BP reduction - based on either ABP or home BP HBP monitoring- greater than 10 for systolic andor diastolic BP. Nighttime HTN is defined as nighttime ABP or HBP 12575 mmHg systolic andor diastolic. 