Table 2. Relevant sociological, clinical and pathological characteristics of the entire cohort and patients segregated based on disease stage.

	Stage I and II		Stage III		Stage Unknown		P*	Total
	Median	Range	Median	Range	Median	Range		Median	Range
Year of Diagnosis	2005	1988–2012	2006	1988–2012	1998	1988–2012	<0.001	2004	1988–2012
Age at Diagnosis (yr)	53	18–89	54	20–87	52	18–88	0.286	53	18–89
Size in mm	100	12–800	117	12–280	105	1–990	0.157	105	1–990
N and %	332	52	215	33	94	15		641
Sex							0.103
Male	117	35	92	43	30	32		239	37
Female	215	65	123	57	64	68		402	63
Race							0.146
White	279	84	192	89	84	89		555	87
Other	53	16	23	11	10	11		86	13
Marital status							0.282
Divorced	23	7	17	8	9	10		49	8
Married	209	63	142	66	54	57		405	63
Single	70	21	37	17	18	19		125	20
Separated	1		3	1	0	0		4	1
Widowed	25	8	12	6	11	12		48	7
Unknown	4	1	4	2	2	2		10	2
Laterality							0.063
Left	193	58	103	48	50	53		346	54
Right	139	42	108	50	44	47		291	45
Unknown or bilateral			4	2				4	1
Tumor Grade							0.026**
I/II	38	11	18	8	13	14		69	11
III/IV	40	12	43	20	10	11		93	15
Unknown	254	77	154	72	71	76		479	75
Lymph node examined							<0.001
No	273	82	127	59	88	94		488	76
Yes	54	16	83	39	2	2		139	22
Unknown	5	2	5	2	4	4		14	2
Radiotherapy							0.0067
No or unknown	312	94	185	86	86	91		583	91
Yes	20	6	30	14	8	9		58	9
Cause of death							<0.001
Alive	186	56	77	36	28	30		291	45
Dead (due to ACC)	110	33	122	57	51	54		283	44
Dead (due to other reasons)	36	11	16	7	15	16		67	10

^*compared among stage I/II, stage III and stage Unknown groups using analysis of variance and χ2 test for continuous variables and for categorical variables, respectively.

^**compared among stage I/II, stage III and stage unknown groups using Fisher's exact probability test. Cases with unknown grade were excluded.