NINJ2 and lung cancer: Among patients aged ≤59 years, rs75750647 of NINJ2 was considered a risk factor for lung cancer in the homozygote (adjusted OR = 1.95, 95% CI: 1.04–3.65, p = 0.036) and recessive (adjusted OR = 1.84, 95% CI: 1.01–3.34, p = 0.047) models, while rs10849390 GG carriers had a 0.81-fold increased risk of lung cancer in the recessive model (95% CI: 1.03–3.18, p = 0.039).