Table 4. Correlation between lymph node ratio classifications and clinicopathological characteristics of patients with lymph node-positive cervical cancer.
| Variable | LNR ≤ 0.16 (%) | LNR > 0.16 (%) | P value |
|---|---|---|---|
| Year of diagnosis | |||
| 1988–1992 | 161 (10.2) | 51 (7.4) | 0.044 |
| 1993–1997 | 235 (14.9) | 94 (13.6) | |
| 1998–2002 | 406 (25.8) | 169 (24.4) | |
| 2003–2010 | 774 (49.1) | 379 (54.7) | |
| Race | |||
| Black | 137 (8.7) | 69 (10.0) | 0.540 |
| White | 1258 (79.8) | 540 (77.9) | |
| Other | 181 (11.5) | 84 (12.1) | |
| Age (years) | |||
| < 50 | 1125 (71.4) | 434 (62.6) | < 0.001 |
| ≥ 50 | 451 (28.6) | 259 (37.4) | |
| Tumor histology | |||
| Squamous | 1061 (67.3) | 457 (65.9) | 0.629 |
| Adenocarcinoma | 326 (20.7) | 143 (20.6) | |
| Other | 189 (12.0) | 93 (13.4) | |
| Grade (n = 2,072) | |||
| Well-differentiated | 74 (5.1) | 26 (4.1) | 0.010 |
| Moderately-differentiated | 591 (41.0) | 220 (34.9) | |
| Poorly/undifferentiated | 776 (53.9) | 385 (61.0) | |
| FIGO stage | |||
| I | 1183 (75.1) | 444 (64.1) | < 0.001 |
| II | 393 (24.9) | 249 (35.9) | |
| RT | |||
| No | 287 (18.2) | 119 (17.8) | 0.552 |
| Yes | 1289 (81.2) | 574 (82.8) |
Abbreviations: RT, radiotherapy; FIGO, International Federation of Gynecology and Obstetrics; LNR, lymph node ratio.