Table 2. Correlation of clinicopathological characteristics with Bmi-1 levels in NPC tissues.
| Characteristics | Case no. | Bmi-1 expression | χ2 | P | |
| High (n, %) | Low (n, %) | ||||
| Sex | |||||
| Female | 26 | 15 (57.7) | 11 (42.3) | 1.500 | 0.221 |
| Male | 72 | 51 (70.8) | 21 (29.2) | ||
| Age (years) | |||||
| <47 | 53 | 38 (71.7) | 15 (28.3) | 0.994 | 0.319 |
| ≥47 | 45 | 28 (62.2) | 17 (37.8) | ||
| Histological type | |||||
| DNKC | 7 | 4 (57.1) | 3 (42.9) | 0.357 | 0.550 |
| UDC | 91 | 62 (68.1) | 29 (31.9) | ||
| T classification | |||||
| T1-T2 | 40 | 22 (55) | 18 (45) | 4.685 | 0.030 |
| T3-T4 | 58 | 44 (75.9) | 14 (24.1) | ||
| Lymph node metastasis | |||||
| N0-N1 | 19 | 5 (26.3) | 14 (73.7) | 18.044 | <0.001 |
| N2-N3 | 79 | 61 (77.2) | 18 (22.8) | ||
| Distant metastasis | |||||
| No | 94 | 62 (66) | 32 (34) | 2.022 | 0.155 |
| Yes | 4 | 4 (100) | 0 (0) | ||
| Clinical stage | |||||
| I-II | 25 | 10 (40) | 15 (60) | 11.414 | 0.001 |
| III-IV | 73 | 56 (76.7) | 17 (23.3) | ||
Abbreviations: DNKC: differentiated nonkeratinizing carcinoma; UDC: undifferentiated carcinoma; T: tumor size; N: lymph node metastasis.