IL6 and squamous cell carcinoma: Figure 3 shows that IL-6 was associated with lung cancer, regardless of the histological type (HR [95% CI]: squamous-cell carcinoma, 1.28 [1.00–1.62]; adenocarcinoma, 1.38 [1.09–1.74]; small-cell carcinoma, 1.31 [1.03–1.66], respectively).