Research

Adherence

Passive information and encouragement delivered via mail or email does not provide additional clinical benefits for cardiovascular risk factors (weight, BMI, waist circumference, smoking) compared to usual care alone.

Sending patients regular emails or letters with health tips and encouragement is not enough to change lifestyle habits like smoking or weight. While blood pressure may improve due to standard care or the Hawthorne effect, passive digital/mail interventions do not add value. To change behavior, patients need active, sophisticated support systems, not just information.

ModerateRefutesMEDIUM confidence
Information on cardiovascular risk factors and encouragement by means of letters or email did not provide additional benefits.
Dirk Devroey et al. · Vascular Health and Risk Management · 2013

Why this rating

Randomized controlled trial, but small sample size (n=55) and short duration (6 months) limit generalizability.

Source

Effectiveness of a quality improvement intervention targeting cardiovascular risk factors: are patients responsive to information and encouragement by mail or post?

Dirk Devroey et al. · Vascular Health and Risk Management · 2013

DOI 10.2147/vhrm.s39919

rct · n=55Cited 19×
Read the paper
DOI resolved against Crossref · corpus check 2026-06-10

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