. Author manuscript; available in PMC: 2012 Jul 1.

Published in final edited form as: Clin Lung Cancer. 2011 Nov 3;13(2):81–89. doi: 10.1016/j.cllc.2011.08.002

Table 2.

Summary Estimated NPV Per Nodal Station

Stage	No. of Studies	No. of Patients	N1^a		N2^b		Overall^c
Stage	No. of Studies	No. of Patients	NPV	95% CI	NPV	95% CI	NPV	95% CI
I	7	624	0.92	0.89, 0.96	0.95	0.93, 0.97	0.87	0.80, 0.93
IA	4	360	0.92	0.89, 0.94	0.95	0.93, 0.97	0.86	0.82, 0.89
IB	1	61	0.75	0.62, 0.85	0.85	0.73, 0.92	0.61	0.47, 0.73

Abbreviations: CI = confidence interval; NPV = negative predictive value.

Hilar nodal metastasis alone.

Mediastinal nodal metastasis with or without N1 disease.

Positive nodal disease at N1 or N2.