Table 1. Comparison between the detection rate in NPS and saliva.

	NPS
Saliva	Positive	Negative	Total
Positive	49 (84.5%)	3 (5.2%)	52 (89.7%)
Negative	6 (10.3%)	0	6 (10.3%)
Total	55 (94.8%)	3 (5.2%)	58 (100%)