Table 2.

False negatives and true positives of the DPP test for the diagnosis of neurosyphilis

	Treponemal test			Nontreponemal test
	False negatives 5/35 (14%)	True positives 30/35 (86%)	P-values	False negatives 7/35 (20%)	True positives 28/35 (80%)	P-values
Median serum RPR titer (IQR)	1:128(1:128–1:512)	1:256(1:64–1:1024)	0.810	1:128(1:64–1:256)	1:256(1:128–1:512)	0.154
Median CSF-VDRL (IQR)	2(1–4)	4(2–8)	0.151	2(1–2)	4(2–8)	0.005
Median CSF WBC (IQR)	58(28–213)	69(44–138)	0.604	31(29–349)	72(49–124)	0.522

Results are expressed as number (n), percent (%) or median (interquartile range)

^*CSF=cerebrospinal fluid; RPR=rapid plasma reagin; VDRL=venereal diseases research laboratory test; WBC=white blood cells