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. Author manuscript; available in PMC: 2015 Jan 6.
Published in final edited form as: J Thorac Oncol. 2014 Feb;9(2):214–221. doi: 10.1097/JTO.0000000000000071

TABLE 4.

PFS and OS by Squamous and Nonsquamous Histology

Median Survival (95% CI) (mo)
Two-df Log-Rank Test
Arm I (Pem) Arm II (Sun) Arm III (Pem + Sun) p
Squamous N = 4 N = 7 N = 6
 PFS 2.02 (1.22–7.85) 4.10 (1.35–5.52) 1.77 (0.39–7.20) 0.650
 OS 9.28 (7.85–.) 10.18 (6.80–15.54) 4.70 (0.39–14.72) 0.259
Nonsquamous N = 38 N = 40 N = 35
 PFS 5.13 (1.71–9.49) 2.96 (1.68–4.17) 4.17 (2.53–5.78) 0.210
 OS 13.04 (8.25–17.45) 7.29 (4.83–13.47) 7.13 (3.68–9.89) 0.089

PFS, progression-free survival; OS, overall survival; CI, confidence interval.