Fig. 4From: Evaluation of Internet-based pharmaceutical care effect on young and middle-aged patients with hypertension by the principal component analysis and the Markov cohort during COVID-19 pandemicAnalysis in the first questionnaires and the first questionnaires by OPLS-DA score plots (A) and S-plot with comparison of 10 difference questions (B) (●, the first questionnaires; ○, the fourth questionnaires; 10 differential questions are labeled in S-plots). Statistical analysis was performed using t test. *P < 0.05; **P < 0.01; ***P < 0.001. SBP systolic blood pressure, DBP diastolic blood pressure, Q QuestionBack to article page