Table 4B.

Risk stratification of patients.

Patients		LLNM		P-value
		negative (−)	positive (+)
in retrospective cohort	low-risk	144	37	0.000
	moderate-risk	51	77
	high-risk	2	25
in prospective cohort	low-risk	25	12	0.000
	moderate-risk	15	31
	high-risk	1	12