2.6. Nocturnal blood pressure drop pattern
This study calculated the nocturnal blood pressure reduction rate according to the subjects’ changes in dSBP and nSBP. The specific calculation method was as follows: nocturnal blood pressure reduction rate = (dSBP − nSBP)/dSBP. Patients with 10% ≤ nocturnal blood pressure reduction rate <20% were classified as having a dipper nocturnal blood pressure decline pattern; patients with nocturnal blood pressure decrease rate < 10% or nocturnal blood pressure decrease rate ≥ 20% were classified as having a non-dipper blood pressure pattern.