Table 1: IHC grades of biomarkers in nasopharynx samples.

8-Nitroguanine IHC grades++++++++++ value

BiopsyNasopharyngitis (12)46200
NPC (26)0581030.001

ArrayNormal mucosa (12)651000.662
NPC (35)13108130.0000.135

CD44v6 IHC grades++++++++++ value

BiopsyNasopharyngitis (11)74000
NPC (18)023580.002

ArrayNormal mucosa (12)1110000.262
NPC (35)6415910.0010.001

ALDH1A1 IHC grades++++++++++ value

BiopsyNasopharyngitis (5)22100
NPC (16)035620.044

ArrayNormal mucosa (12)462000.932
NPC (35)031111100.0000.514

CD24 IHC grades++++++++++ value

BiopsyNasopharyngitis (9)03420
NPC (10)032500.386

ArrayNormal mucosa (12)273000.143
NPC (35)15134300.1890.006

IHC grades were assigned to each specimen according to the grade of staining intensity as described in the Materials and Methods.
values were calculated by the chi-square test when comparing NPC and non-cancer tissues (nasopharyngitis, normal mucosa) in each group (biopsy or array, left). Comparisons were also made between biopsy nasopharyngitis tissues and array normal mucosa (right upper) and between biopsy NPC and array NPC (right lower).