Table 1.
Mean adjusted systolic blood pressure (SBP), diastolic blood pressure (DBP) and age at examination (Age) for men in Glasgow Alumni cohort according to their year of birth (Birthyear) and year of examination (Examyr).
Table 2.
Mean adjusted systolic blood pressure (SBP), diastolic blood pressure (DBP) and age at examination (Age) for women in Glasgow Alumni cohort according to their year of birth (Birthyr) and year of examination (Examyr).
Table 3.
Results from linear partial least squares regression with scaled variables for men and women in Glasgow Alumni Cohort.
Figure 1.
The relationship between adjusted blood pressure and year at birth or examination for men and women in the restricted cubic splines partial least squares regression.
For SBP, the R2 is 3.75% for men and 4.48% for women, which are greater than 80% of total R2 that can be explained. For DBP, the R2 is 7.48% for men and 2.40% for women, which are greater than 56% of total R2 that can be explained.
Figure 2.
The partial least squares regression coefficients plots for the year of birth or the year at examination.
Both variables and age at examination are treated as categorical with the first year as the reference group. The vertical bars are the confidence intervals. The outcome variable is systolic blood pressure (SBP). PRESS only selected one PLS component for each model. The two-component models explained almost all the variances (>98%) in blood pressure than can be explained.
Figure 3.
The partial least regression coefficients plots for the year of birth or the year at examination.
Both variables are treated as categorical with the first year as the reference group. The vertical bars are the confidence intervals. The outcome variable is systolic blood pressure (SBP).