Table 4.

Weighted Percent Distribution of Clinical Characteristics by Presence of an Approved Residency Training Program for Cases with Non-distant Melanoma

	1995		1996		2001
Residency Training Approval	No/Unk*	Yes	No/Unk*	Yes	No/Unk*	Yes
Number of cases	102	161	361	391	365	355
Histology
Malignant melanoma, NOS	33.2	27.6	37.7	32.3	43.3	35.4
Superficial spreading	44.3	49.6	39.7	44.8	34.1	45.0
Nodular	16.1	7.0	8.8	10.9	10.7	8.9
Lentigo maligna melanoma	3.6	5.8	9.6	6.1	6.2	4.6
Desmoplastic	0.5	2.9	0.1	0.9	1.2	1.4
Other	2.3	7.0	4.1	5.1	4.5	4.6
Lymph Nodes Examined
None	84.8	84.2	84.6	71.5	66.2	54.1
1 node	3.0	5.2	2.3	8.4	9.8	11.8
2-5 nodes	1.0	5.2	5.3	9.3	16.0	23.0
6-10 nodes	2.6	1.0	2.1	3.1	3.2	3.0
11+ nodes	5.6	4.0	3.9	5.8	2.4	6.3
At least one, but number unknown	3.1	0.3	1.4	1.6	2.4	1.5
Other	0.0	0.0	0.3	0.3	0	0.3
Technique of Lymph Node Dissection
No LND	84.8	84.2	84.6	71.5	66.2	54.1
Traditional	9.6	4	8.7	6.9	3.6	4.9
Any Sentinel	1.7	10.3	6	20.1	28.6	38.7
Technique Unknown	4	1.5	0.7	1.4	1.7	2.3
Margins
< 1.0 cm	19.6	41.6	23.0	40.7	20.4	29.8
>1.0 - 2.0 cm	14.1	17.0	13.3	25.2	13.8	24.5
>2.0 cm	11.8	4.6	18.0	10.2	5.4	7.5
Margins clear, NOS	0	0	4.6	1.9	39.8	25.4
Tumor at margin	2.6	3.3	1.5	2.7	2.6	2.9
Not stated/Unknown	51.9	33.5	39.6	19.3	18.1	9.9
Treatment
No treatment reported	0.0	0.0	0.0	0.0	0.0	0.0
Surgery Only	91.1	91.9	87.5	86.2	95.2	91.3
Chemo/Immunotherapy Only	0.1	0	0	0	0	0.4
Surgery and Chemo/Immunotherapy	8.0	2.7	5.6	8.9	3.2	7.4
Surgery and XRT	0	1.8	0.9	0.3	0.5	0.3
Surgery, XRT, and Chemotherapy	0	0	0.7	0.8	0	0.2
Unknown	0.8	3.7	5.3	3.8	1.0	0.4

^*Unknown