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Evaluation for unmeasured confounding between SLNB groups by E-value analysis.
| Analysis | 1-Year overall survival | 3-Year overall survival |
|---|---|---|
| Crude analysis—E value | 3.60 | 2.24 |
| Multivariable analysis—E value | 2.86 | 1.85 |
| Propensity-score analyses | ||
| With inverse probability weighting—E value | 3.09 | 1.58 |
| With matching—E value | 3.16 | 1.88 |
The larger the E-value, the lower the probability that an unmeasured confounder was to explain the entirety of the treatment effect.
