Phenomenon Shown in Photograph is :
Rule of Halves
Tracking of BP level in community.
- Tracking is a phenomenon of ranking order of BP level through time.
- Follow-up of cohort of individual BP level from childhood to adulthood.
- Initial low BP level will follow the same track upto adult.
- Initial high BP will tend to become higher in adult life.
- Child likely to be in risk in later life can be screened.