Mora et al studied women and reported "However, when small and large LDLNMR were examined in a model that included all 9 NMR-measured lipoprotein particle concentrations (data not shown), both large and small LDLNMR were significantly associated with CVD to a similar degree." [ 1] They also found that small dense HDL appeared to increase risk of CVD.
Otvos et al studied men and reported "Both large and small LDL subclass particle numbers were now strongly and independently predictive of CHD outcomes, both at baseline and during the trial. ORs for small and large LDL-P during the trial were 1.41 (95% CI, 1.14 to 1.73; P=0.001) and 1.34 (95% CI, 1.11 to 1.62; P=0.002), respectively." [2 ] In their population, small LDL increased risk by 41%, and large LDL by 34%; similar risk regardless of particle size (at any give total LDL concentration). They found "Mean LDL and HDL particle sizes were not associated with CHD events."