The result of the meta-analysis of the difference in the presence of 30 bp deletion LMP1 variant between NPC biopsy samples and throat washings from healthy respondents showed significantly greater frequency of this variant in NPC biopsies (OR = 3.77, 95% CI = 2.21–6.44, p < 0.001) (Figure 6). This evidence concerns the gene PDLIM7 and nasopharyngeal carcinoma.