Fig 4. Relationships between the categorical blood pressure parameters [SBP (A), DBP (B), MABP (C)] and cognitive impairment in the age-based subgroups after correcting for confounds (model 6).

SBP, DBP and MABP were transformed into categorical data (SBP<140 mmHg, 140 mmHg≤SBP<160 mmHg, and SBP≥160 mmHg; DBP<90 mmHg, 90 mmHg≤DBP<100 mmHg, and DBP≥100 mmHg; MABP<100 mmHg, 100 mmHg≤MABP<110 mmHg, and MABP≥110 mmHg). The SBP<140 mmHg, DBP<90 mmHg, and MABP<100 mmHg groups were established as the reference groups. The confounding variables considered in model 6 were the same as those considered in model 5.