MDM4 and non-Hodgkin lymphoma: In stratified analyses with age, the TP53 Arg/Pro and Pro/Pro or the MDM4 AC and CC genotypes were significantly associated with NHL risk in subjects aged 50 years or younger (TP53: OR = 2.46, 95% CI = 1.45–4.16, P = 0.001; MDM4: OR = 0.42, 95% CI = 0.18–0.99, P = 0.048), but not in subjects aged older than 50 years (TP53: OR = 1.36, 95% CI = 0.80–2.32, P = 0.263; MDM4: OR = 0.48, 95% CI = 0.19–1.21, P = 0.121).