TABLE 1

Evidence Grading System

Ranking System for Evidence According to the CDC/Healthcare Infection Control Practice Advisory Committee System
Category IA: Strongly recommended for implementation and strongly supported by well-designed experimental, clinical, or epidemiologic studies.
Category IB: Strongly recommended for implementation and supported by some experimental, clinical, or epidemiologic studies and a strong theoretical rational.
Category IC: Required for implementation, as mandated by federal and/or state regulation or standard.
Category II: Suggested for implementation and supported by suggestive clinical or epidemiologic studies or a theoretical rationale or a consensus by a panel of experts.