However , multivariate adjusted heritability estimates of day SBP ( h = 0.290.09 , P < 0.0001 ) and DBP ( h = 0.330.09 , P < 0.0001 ) were not diminished by further adjustments for office SBP ( h = 0.420.09 , P < 0.0001 ) or DBP ( h = 0.340.09 , P < 0.0001 ) .