Internet Based Vascular Risk Factor Intervention and Self Management Study (IRIS)

UMC Utrecht

Status: Completed

Conditions: Cardiovascular Diseases

Treatments: Other: internet based vascular risk factor intervention

Study type: Interventional

Funder types: Other

Identifiers

NCT00785031

80-00702-98-084 ZonMw

08-119/O (Other Identifier)

Details and patient eligibility

About

The objective of the study is to evaluate the efficacy and cost-effectiveness of an internet based vascular risk factor program on top of usual care compared to usual care alone for treatment of vascular risk factors in patients at high risk for new vascular events.

Full description

The objective of the study is to evaluate the efficacy and cost-effectiveness of an internet based vascular risk factor program on top of usual care compared to usual care alone for treatment of vascular risk factors in patients at high risk for new vascular events.

Study design: randomized non-blinded trial Study population: patients in the Rijnstate Hospital Arnhem and the UMC Utrecht, The Netherlands with a recent diagnosis of cerebral, cardiac or peripheral artery disease that entered the risk factor screening programs in these hospitals revealing 2 or more treatable risk factors.

Intervention: After the screening program patients will be randomized to usual care alone or to the internet program on top of usual care. Usual care for risk factor management will be delivered by the medical specialist and/or the general practitioner. Patients randomized to the internet based intervention program are first seen by the nurse practitioner on a regular clinic visit. The internet dossier is than created and explained to the patient. Subsequent contacts between nurse practitioner and patient about risk factor management is mainly by the internet. The nurse practitioner works according to the national guidelines for cardiovascular risk management ('CardioVascular Risico Management 2006') and is supervised by an internist. The study period is 1 year. All patients in both groups ware asked to return to the clinic for a follow up measurement of risk factors after 1 year.

Outcome measures: Primary outcome is the difference in Framingham heart risk score between baseline and after 1 year. As secondary outcome the percentage of patients achieving treatment goals for each risk factor and the average change in the absolute value of each risk factors after 1 year will be used.

Sample size calculation/data analysis: 380 patients. Changes in risk factors (absolute change and fraction of patients achieving treatment goal of each risk factor) at the start and after 1 year and between the groups are tested with independent sample t-test and Chi-square test.

Economic evaluation: The balance between costs and effects of the internet based vascular risk factor management program will be compared to usual care. Using a previously developed cardiovascular disease model incremental cost-utility analyses will be conducted with remaining life expectancy as the relevant time horizon.

Enrollment: 330 patients

Sex: All

Ages: 18 to 80 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Participation in a cardiovascular risk screening program
• 2 or more modifiable risk factors not on target:
• SBP > 140 mmHg
• LDL-c > 2.5 mmol/l
• Triglycerides > 1.7 mmol/l
• BMI > 25 kg/m2
• Diabetes Mellitus or fasting glucose > 6.1 mmol/l
• Smoking

Exclusion criteria

• No internet access at home
• Unable to read and write Dutch
• Dependent in in daily activities (Ranking score >=3)
• Life expectancy < 2 years or an active malignant disease

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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330 participants in 2 patient groups

internet based intervention

Active Comparator group

Treatment:

Other: internet based vascular risk factor intervention

usual care

No Intervention group

Description:

Patients receive their usual care from their specialist or general practitioner.