Table 2. Mean number of positive lymph nodes and total nodes harvested for each Dukes' C stage.
| |
|
|
|
95% Confidence interval of the difference |
|
|
|---|---|---|---|---|---|---|
| Dukes' Stage | Mean lymph nodes (s.e.m.) | Screen n=80 | Interval n=49 | Lower | Upper | t-Test, P-value |
| C1 |
Positive lymph nodes |
2.9 (0.3) |
3.6 (0.6) |
−0.63 |
2.05 |
0.293 |
| |
Total lymph nodes |
15.3 (0.8) |
16.5 (1.2) |
−1.61 |
4.14 |
0.383 |
| |
n=9 |
n=7 |
|
|
|
|
| C2 |
Positive lymph nodes |
3.9 (0.9) |
14.6 (4.3) |
2.25 |
19.12 |
0.017 |
| |
Total lymph nodes |
13.0 (1.6) |
20.3 (5.1) |
−3.02 |
17.6 |
0.152 |
| |
n=89 |
n=56 |
|
|
|
|
| C combined |
Positive lymph nodes |
3.0 (0.3) |
5.0 (0.9) |
0.43 |
3.53 |
0.013 |
| Total lymph nodes | 15.0 (0.7) | 17.0 (1.3) | −0.86 | 4.80 | 0.171 | |