Fig. 4

PFS according to ERCC1 N118 N polymorphism. Patients with TT in the site of the ERCC1 N118 N polymorphism lived longer without disease progression [median PFS: 8.8 months, mean PFS ± SE: 14.5 months ±3.6 (95% CI: 7.5–21.5)] than patients with CC at the same site [median PFS: 5.2 months, mean PFS ± SE: 5.9 ± 1.3 (95% CI: 3.4–8.4)] and patients with CT at the same site [median PFS: 3.9 months, mean PFS ± SE: 5.1 months ±1 (95% CI: 3–7.1)] (p = 0.006). PFS, Progression Free Survival