Table 5.

False-negative rate for 153 surgeons from all training groups (on the basis of 682 patients in group 1 with at least one positive lymph node) according to the number of sentinel lymph nodes removed^*

No. of SNs removed	No. of false negative/total	False-negative rate, % (95% CI)
1	28/151	18.5 (12.7 to 25.7)
2	17/157	10.8 (6.4 to 16.8)
3	11/168	6.6 (3.3 to 11.4)
≥4	9/206	4.4 (2.0 to 8.1)

^*CI = confidence interval; SN = sentinel lymph node; total = number of patients with positive nodes according to the number of SNs removed.