Table 1. Clinical performance of STANDARD F Strep A Ag FIA and Sofia Strep A FIA compared to throat culture (n=372)

Ann Clin Microbiol 2020;23:117-124. Performance Evaluation of STANDARD F Strep A Ag FIA for Diagnosis of Group A Streptococcal Pharyngitis

Rapid antigen detection tests	Results	Throat culture		Sensitivity (95% CI)	Specificity (95% CI)
Rapid antigen detection tests	Results	GAS Positive	GAS Negative	Sensitivity (95% CI)	Specificity (95% CI)
STANDARD F Strep A Ag FIA	Positive	96	13	95.0% (88.8-98. 4%)	95.2% (91.9-97. 4%)
	Negative	5	258	95.0% (88.8-98. 4%)	95.2% (91.9-97. 4%)
SOFIA Strep A FIA	Positive	95	11	94.1% (87.5-97. 8%)	95.9% (92.9-98. 0%)
	Negative	6	260	94.1% (87.5-97. 8%)	95.9% (92.9-98. 0%)

Abbreviation: GAS, group A streptococci; CI, confidence interval.