Table 1.

Sensitivity and specificity results

Results	Alpha defensin-1 assay	Culture	Cell count	Erythrocyte sedimentation rate	C-reactive protein
Sensitivity	100%	69%	95%	50%	79%
	(95% CI, 79%–100%)	(95% CI, 43%–86%)	(95% CI, 72%–99%)	(95% CI, 29%–75%)	(95% CI, 54%–93%)
		p = 0.065	p = 0.239	p = 0.013	p = 0.067
Specificity	95%	88%	85%	80%	66%
	(95% CI, 83%–99%)	(95% CI, 72%–95%)	(95% CI, 69%–94%)	(95% CI, 63%–91%)	(95% CI, 48%–80%)
		p = 0.185	p = 0.112	p = 0.077	p = 0.065

P value is for comparison with the AD-1 assay.