Table 1.

Comparison of Phenotypic methods for detection of MRSA

Method	No of False Positives	No of False Negatives	Sensitivity (%)	Specificity (%)	PPV	NPV	Concordance with PCR (%)
Cefoxitin disc diffusion	0	2	97.2	100	100	93.3	98
Vitek	0	2	97.2	100	100	93.3	95
Chrom Agar	6	0	100	78.6	92.3	100	94

PPV- Positive Predictive Value, NPV- Negative Predictive Value