Table 1.

Characteristics of the full cohort (N = 106,565) and the sub-cohort (N = 74,722).

			Full Cohort (n = 106565)		Sub-Cohort (n = 74722)
			N or mean	% or SD	N or mean	% or SD
Section 1: Summary Characteristics	Age at Diagnosis	66–69	24748	23.23	12990	17.39
		70–74	28478	26.72	22844	30.57
		75–84	41223	38.68	31316	41.91
		85 or older	12116	11.37	7572	10.13
	Race/Ethnicity	White	89937	84.40	63508	84.99
		African-American/Black	9206	8.64	6021	8.06
		Asian	2985	2.80	2150	2.88
		Hispanic	1346	1.26	938	1.25
		Native American	233	0.22	154	0.21
		Others	2858	2.68	1951	2.61
	Stage at Diagnosis	0	16127	15.13	12415	16.61
		I	46235	43.39	35178	47.08
		II	26549	24.91	18607	24.90
		III	7732	7.26	4674	6.26
		IV	5404	5.07	1504	2.01
		Unknown	4518	4.24	2344	3.14
	Number of years of Medicare enrollment	Overall	16.66	6.09	18.04	5.52
		Pre-diagnosis	10.76	5.97	11.13	5.35
		Post-diagnosis	4.90	2.73	5.91	2.22
	Records with Complete ZIP Codes Since Enrollment		106529	99.96	74722	100
Section 2: Moves and Move Rate	Number of moves since enrollment	0	64655	60.67	43665	58.44
		1–2	34703	32.56	25612	34.27
		3+	7207	6.76	5445	7.28
	Number of moves pre-diagnosis	0	75326	70.68	52382	70.10
		1–2	27020	25.35	19551	26.16
		3+	4212	3.95	2789	3.73
	Number of moves post-diagnosis	0	88189	82.75	59306	79.36
		1–2	17700	16.60	14805	19.81
		3+	676	0.63	611	0.81
	Number of moves per year (move rate)	Overall	0.03	0.06	0.03	0.06
		Pre-diagnosis	0.07	0.13	0.04***1	0.08
		Post-diagnosis	0.04	0.12	0.04***1	0.10
Section 3: Unique ZIP codes	Number of unique ZIP codes since enrollment	1	62164	58.33	42050	56.28
		2	28094	26.36	20433	27.35
		3+	16308	15.30	12239	16.37
	Number of unique ZIP codes pre-diagnosis	1	77702	72.91	53803	72.00
		2	20309	19.05	15001	20.07
		3+	8548	8.02	5918	7.92
	Number of unique ZIP codes post-diagnosis	02	3747	3.51	0	0
		1	87531	82.13	61284	82.01
		2	13189	12.37	11518	15.41
		3+	2099	1.96	1920	2.56

Signif. Codes: ‘***’<0.001, ‘**’<0.01, ‘*’<0.05.

1 Wilcoxon rank-sum test was performed to compare the move rate before and after diagnosis for the sub-cohort.

2 In the Full cohort 3747 of the women had survival less than a year and therefore no ZIP Code is recorded after the year of diagnosis.