Table 1.

Demographic and Pathologic Characteristics of Patients who did and did not undergo 3-year Surveillance Imaging

Variable	Underwent 3 year scans		Did not undergo 3 year scans		Total
	(n=52)		Followed at BIDMC (n=158)		(n=210)
	No.	%	No.	%	No.	%
Sex
Male	32	62	91	58	123	59
Female	20	38	67	42	87	41
Age, years
Median	54		54		54
Range	16–76		24–86		16–86
Location
Trunk	15	29	65	41	80	38
Extremity	16	31	48	30	64	30.5
Head/neck	14	27	30	19	44	21
Unknown primary	6	12	15	10	21	10
Prostate	1	2	0	0	1	0.5
Breslow Thickness (mm)
Median	2.9		3.0		3.0
Range	1.1–55		0.25–34		0.25–55
Ulceration
Present	11	21	58	37	69	33
Absent	31	60	55	35	86	41
Unknown	4	8	30	19	34	16
NA	6	12	15	9	21	10
Clark level
II	0	0	2	1	2	1
III	2	4	7	4	9	4
IV	36	69	83	53	119	57
V	6	12	22	14	28	13
Unknown	2	4	20	13	22	11
NA	6	12	24	15	30	14
Mitosis, mm2
Median	3		6		4
Range	0–60		0–33		0–60
Stage
IIB	6	12	27	17	33	16
IIC	4	8	11	6	14	7
IIIA	18	35	15	10	33	16
IIIB	10	19	43	27	53	25
IIIC	14	27	62	39	76	36
Interferon
Yes	45	87	100	63	145	69
No	7	13	58	37	65	31