EGFR and AIDS dementia complex: The EGFR mutations were more frequent in females than males (56.1% vs. 29.6%, P < 0.001; Fig. 3A), in patients without smoking history than smokers (55% vs. 20%, P < 0.001; Fig. 3B), in ADC patients than SCC patients (51.7% vs. 25%, P < 0.001; Fig. 3C), and in IV stage patients than I-III stage patients (47.5% vs. 27.3%, P = 0.014; Fig. 3D).