Table 1.

Strategies Associated with Screening Programs

Screening Level	Definition
Primary prevention	Primary prevention strategies intend to avoid the development of disease.
Secondary prevention	Secondary prevention strategies attempt to diagnose and treat an existing disease in its early stages before it results in significant morbidity.
Tertiary prevention	Treatments aim to reduce the negative impact of established disease by restoring function and reducing disease-related complications.
Quaternary prevention	This term describes the set of health activities that mitigate or avoid the consequences of unnecessary or excessive interventions.