EGFR and hyperlipidemia: Among patients with EGFR‐TKI treatment, hyperlipidemia and radiation therapy were associated with increased WMH (hyperlipidemia: aRR 1.65 [95% CI 1.01−2.70], p = .047; radiation therapy: aRR 2.37 [95% CI 1.51−3.71], p = .010).