TABLE 3.

Baseline comparison of characteristics between the MRI positive and MRI negative groups

	Sex		Age		Smoking habit		Driver gene status		Intracranial pressure		CNS parenchymal metastasis		Hydrocephalus
	Male	Female	≥65	<65	Smoker	Non‐smoker	Mutations	Wild‐type or NA	Elevated	Not elevated	Present	Absent	Present	Absent
All patients (N = 86)	38	48	18	68	26	60	73	13	52	34	52	34	30	56
MRI positive group (N = 30)	14	16	8	22	8	22	25	5	20	10	17	13	16	14
MRI negative group (N = 56)	24	32	10	46	18	38	48	8	32	24	35	21	14	42
p value	0.735		0.339		0.598		0.769		0.389		0.598		0.009*

Abbreviations: CNS, central nervous system; LM, leptomeningeal metastasis; MRI, magnetic resonance imaging; NA, not available.

^* p < 0.05.