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RESEARCH AND
PRACTICAL EVIDENCE

The evidence hierarchy

4 CATEGORIES OF EVIDENCE

Our evidence hierarchy is based on the Oxford Centre for Evidence-based Medicine Levels of Evidence, a renowned model for collecting clinical evidence. We collect data in four categories to document the effects of Chroma Zenit® circadian lighting and Chroma Zona® ergonomic lighting solution.

Clinical studies Clinical studies with control group, intervention, randomization.
Qualitative studies Systematic review of cases - control studies.
User surveys Structured, anonymous surveys.
Practical evidence Expert testimonials and case studies, best practices.

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