Table 1.
Distribution of lymph node examination and rates of non-examination of key nodal stationsa.
| Variable | Intervention Exposure Cohort | |||
|---|---|---|---|---|
| Neither (Group 1) |
Path Only (Group 2) |
Kit Only (Group 3) |
Both (Group 4) |
|
| N (%) | N (%) | N (%) | N (%) | |
| Total Number of Patients | 1615 (65) | 167 (7) | 264 (11) | 423 (17) |
| Distribution of Number of Lymph Nodes Sampledb | ||||
| Station 10 | 1 (0, 2)3,4 | 1 (0, 2)3,4 | 1 (1, 2)1,2,4 | 1 (1, 3)1,2,3 |
| Stations 11 – 14 | 2 (0, 4)2,3,4 | 5 (1, 11)1 | 4 (1, 7)1 | 4 (1, 9)1 |
| Total N1 | 3 (1, 6) 2,3,4 | 7 (2, 13)1 | 6 (3, 9)1 | 7 (3, 11)1 |
| Total mediastinal lymph nodes | 2 (0, 5)3,4 | 2 (0, 6) 3,4 | 6 (4, 8)1,2,4 | 8 (5, 12)1,2,3 |
| Total lymph nodes | 6 (3, 11)2,3,4 | 12 (5, 18)1,4 | 12 (8.5, 17)1,4 | 16 (10, 21)1,2,3 |
| Distributions of Stations Sampledb | ||||
| Stations 10–14 | 1 (1, 2)3,4 | 2 (1, 2)3,4 | 2 (1, 2)1,2 | 2 (2, 2)1,2 |
| Mediastinal lymph node stations | 2 (0, 3)3,4 | 1 (0, 3)3,4 | 4 (3, 5)1,2,4 | 5 (4, 6)1,2,3 |
a
All percentages rounded to the nearest whole number. Superscripts indicate significant differences (α=0.05 level) between the respective column and columns listed after adjusting for multiple comparisons;
b
Median (1st quartile, 3rd quartile).