Hypertension Clinical Trial
Official title:
Cohort Study to Investigate the Outcomes of Patients With Hypertension and/or Diabetes Mellitus and the Effectiveness and Cost-effectiveness of Structured Multi-disciplinary Intervention Programmes
Objectives: To determine the outcome trajectories of patients with hypertension (HT) and/or diabetes mellitus (DM), and evaluate the long-term effectiveness and cost-effectiveness of the Risk Assessment and Management Programmes (RAMP) and other primary care services such as Patient Support Call Centre (PSCC) on reducing complications and mortality Design: Population-based cohort study Setting: Hospital Authority (HA) primary care clinics Participants: All patients aged ≥18 years with DM or HT managed in HA primary care clinics between 2006 and 2021 Main outcome measures: (1) incidence of DM/HT-related complications (cardiovascular disease, end-stage renal disease, retinopathy, neuropathy and all-cause mortality); (2) service utilization (out-patient clinics, Accident and Emergency and overnight hospitalizations); (3) Incremental cost-effectiveness ratio per complications or all-cause death avoided, and per QALY gained by RAMP or PSCC. Methods: A naturalistic cohort study (maximum 10-year follow-up) and retrospective data extraction from the HA clinical management system (CMS) database will be conducted to identify and correlate outcome trajectories of HT and/or DM patients with personal, service delivery and process of care factors. Outcomes of propensity score matched cohorts who have and have not participated in the programmes will be compared. Multivariable Cox proportional hazards regression and Poisson/negative binomial regression will be conducted to evaluate the effect of RAMP, PSCC and other primary care services on the risk of complications, mortality and service utilization. Empirical costs and effectiveness data will be used to calculate cost-effectiveness from the provider's perspective. Significance: Findings will inform how to optimize service delivery for HT/DM patients in Hong Kong
A naturalistic cohort study with a maximum follow-up period of 10 years, and retrospective extraction of relevant data from the HA clinical management system (CMS) database, designed as four sub-studies:- 1. A trajectory study on all HA primary care patients with HT and/or DM receiving care from 2006 to 2019, to explore the trajectory patterns for clinical, treatment and complication profiles and investigate the impact of multi-morbidity, continuity-of-care, different service delivery models and management strategies (including investigation frequency and specific drug regimens) on outcomes and health service utilization. 2. A 10-year effectiveness and cost-effectiveness analysis (CEA) of RAMP-DM. A cohort of RAMP-DM patients will be compared against a propensity score matched cohort of 'usual care' only DM patients to determine the effectiveness and cost-effectiveness of RAMP-DM on reducing complications and mortality and gain in quality adjusted life years (QALY). The optimal criteria and frequency of repeating RAMP-DM will be determined. 3. A 10-year effectiveness and CEA of RAMP-HT. A cohort of RAMP-HT will be compared against a propensity score matched cohort of 'usual care' only HT patients to determine the effectiveness and cost-effectiveness of RAMP-HT on reducing complications and mortality and gain in QALY. The optimal criteria and frequency of repeating RAMP-HT will be determined 4. An evaluation on the effectiveness and cost-effectiveness of PSCC. A cohort of RAMP-DM plus PSCC (RAMP-DM+PSCC) will be compared against a propensity score matched cohort of RAMP-DM only patients to evaluate the effectiveness and cost effectiveness of PSCC on the reduction of complications and mortality and gain in QALY. ;
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