Table 4

Comparison of EBV DNA quantity in brushing samples/plasma samples in different T stages (T1 versus T2/T3/T4), N stages (N0 versus N1/N2/N3, and overall stages (stage I/II versus III/IV) of NPC cases. Mann-Whitney test was used.

NS, no statistical significance was demonstrated.

Case no.Brush EBV DNA (copies/actin)Plasma EBV DNA (copies/ml)
MedianRangePMedianRangeP
TT193.070.00–399.170.037938.000.00–81,000.00NS
T2/T3/T41919.881.00–12,953.931548.0039.40–45,955.56
NN084.700.00–2,535.37NS546.560.00–1,563.640.003
N1/N2/N32016.570.11–12,953.932605.0042.00–81,000.00
StageI/II118.950.00–12,953.93NS770.000.00–1,563.640.006
III/IV178.930.11–3,384.966106.6742.00–81,000.00