Fig. 2

The expression of HTRA1 in the peripheral blood leukocytes in controls and stroke cases. A The relative expression of HTRA1 between stroke cases and controls in the case–control study. B The relative expression of HTRA1 between stroke cases and controls in the prospective nested case–control study. The dots represent the relative expression levels of HTRA1 in each individual. The upper line and lower line represent upper quartile and lower quartile, and the medium line represents the median. The P values were calculated by Mann–Whitney U tests