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Distribution of Key Variables

Women

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008
	381,186	498,130	620,325	637,733	651,323	656,628	698,375	682,033	661,729	536,332	436,049	432,178	395,564

Unique women per year
One site contributes either no data or incomplete data for years 2004+.
Another site contributes either no data or incomplete data for years 2005+.
Data may not be complete for 2008 at all remaining sites.

[Index of Tables]

Breast cancers

	Diagnosis year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008
	5,208	5,512	6,222	6,637	6,521	6,780	6,673	6,557	6,178	6,029	5,617	4,861	2,610

Unique diagnoses (at most 1 cancer per woman)
One site contributes either no cancer data or incomplete cancer data for years 2006+.
Another site contributes either no cancer data or incomplete cancer data for years 2007+.
Cancer data is not complete for 2008 across all remaining sites.

[Index of Tables]

Exams

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008
	415,923	546,915	696,613	731,289	749,974	764,590	813,476	791,462	767,335	609,149	492,976	490,163	447,417

All exams by year
One site contributes either no data or incomplete data for years 2004+.
Another site contributes either no data or incomplete data for years 2005+.
Data may not be complete for 2008 at all remaining sites.

[Index of Tables]

Indication for exam

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008
1: Routine screening	348,888	456,834	541,804	542,819	536,265	537,909	580,787	567,291	546,276	486,464	395,240	384,473	353,663
2: Additional evaluation	23,855	29,736	37,931	46,084	47,719	57,251	58,221	54,375	49,225	40,412	33,849	36,589	35,586
3: Short interval follow-up	8,266	14,915	21,417	24,126	25,713	26,012	26,286	24,047	21,224	18,155	15,903	15,578	13,980
4: Evaluation	30,337	39,975	53,300	60,918	60,898	61,299	64,072	62,411	62,238	52,932	36,113	37,331	34,364
5: Other	68	799	1,211	1,973	2,631	2,228	3,492	4,071	2,650	1,605	944	652	775
Missing	4,509	4,656	40,950	55,369	76,748	79,891	80,618	79,267	85,722	9,581	10,927	15,540	9,049

[Index of Tables]

Symptoms (self-reported)

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008
0: No symptoms	290,546	395,224	524,743	533,749	529,726	546,465	577,548	549,951	529,685	475,669	399,077	401,247	369,770
1: Pain	4,344	3,886	3,118	4,168	6,978	12,956	15,212	13,029	13,288	13,243	11,160	10,487	9,385
2: Other	12,309	15,042	20,027	20,163	17,466	14,565	13,349	13,134	13,273	12,875	9,541	9,075	7,643
3: Nipple discharge	2,281	2,719	3,028	3,209	2,783	3,337	3,666	3,182	3,024	2,599	2,178	2,171	2,047
4: Lump	20,896	23,667	31,555	37,669	36,792	38,865	37,152	33,327	28,452	23,864	17,454	17,669	16,482
5: Symptoms, not otherwise specified	4,333	4,445	6,214	5,309	4,012	815	405	383	431	535	414	511	366
Missing	81,214	101,932	107,928	127,022	152,217	147,587	166,144	178,456	179,182	80,364	53,152	49,003	41,724

[Index of Tables]

Time since last mammogram

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008
Missing	35,692	41,468	66,626	50,089	48,218	47,967	59,899	54,065	50,113	32,709	21,215	19,847	16,365
0: No previous mammogram	30,705	37,967	47,039	45,952	42,851	39,773	34,806	29,961	26,757	24,356	20,562	19,114	17,138
1: Within a year (0-11 months)	57,128	77,427	107,675	124,980	126,558	131,374	140,619	132,249	127,979	97,211	78,635	80,204	73,099
2: 1-2 years (12-35 months)	247,441	330,747	406,034	449,221	474,286	485,007	512,688	514,609	497,362	399,066	329,012	330,577	305,427
3: 3-4 years (36-59 months)	29,405	36,756	42,752	37,322	36,414	39,269	43,278	39,095	40,642	35,214	27,469	24,516	21,363
4: Five years or more (60+ months)	15,552	22,550	26,487	23,725	21,647	21,200	22,186	21,483	24,482	20,593	16,083	15,905	14,025

[Index of Tables]

Time since last clinical breast exam

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008
Missing	309,597	407,813	580,050	593,654	594,314	573,072	583,333	564,820	521,227	361,115	268,046	260,996	225,208
0: None within the last 3 months / No other information	141	941	1,394	8,681	19,718	58,899	69,993	72,019	82,838	85,865	85,413	93,977	95,764
1: Within the last 3 months	24,860	16,024	3,405	10,701	22,180	89,044	113,399	108,498	119,623	116,987	101,987	100,088	95,626
2: 4 months to 1 year ago	11,587	7,204	889	899	.	12,979	24,292	23,727	21,511	21,400	16,218	15,191	13,117
3: More than 1 year ago	23,255	30,083	23,744	23,747	22,903	15,203	21,518	21,740	21,476	23,015	20,657	19,289	17,190
4: Never had a clinical breast exam	3,671	2,316	608	375	278	463	744	653	660	766	655	620	509
5: Within the last year	42,812	82,534	86,523	93,232	90,581	14,930	197	5	.	1	.	2	3

[Index of Tables]

Any mammogram performed

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008
0: No	12,886	12,420	25,843	41,878	45,781	48,854	53,754	51,188	52,780	31,784	18,943	19,313	18,626
1: Yes	402,432	533,035	669,113	687,924	702,422	714,634	759,722	740,274	714,555	577,365	474,033	466,903	422,907
Missing	605	1,460	1,657	1,487	1,771	1,102	.	.	.	.	.	3,947	5,884

[Index of Tables]

Digital mammograms

	Exam year
	2000	2001	2002	2003	2004	2005	2006	2007	2008
1: Right breast only	1	267	1,072	2,160	3,404	4,379	6,179	9,803	13,069
2: Left breast only	1	254	1,138	2,071	3,341	4,568	6,540	10,279	13,537
3: Unilateral, side not specified	.	45	91	108	111	120	220	323	351
4: Bilateral (both breasts)	3	6,609	21,097	36,153	52,947	64,277	78,119	121,512	176,238
5: Yes, woman-level information only	1	20	47	97	58	7,067	43,512	55,592	25,489
Missing	.	.	2	42	332	875	777	1,011	7,255

[Index of Tables]

Ultrasounds

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008
0: No	372,405	502,477	641,019	676,818	690,654	689,718	724,212	708,891	675,210	537,056	434,933	425,670	386,426
1: Right breast only	2,686	5,141	7,742	9,715	8,987	10,998	14,404	13,908	13,405	12,181	10,955	11,532	11,024
2: Left breast only	3,058	5,839	8,754	10,862	9,904	12,684	15,980	15,105	15,144	13,565	12,265	12,689	12,340
3: Unilateral, side not specified	.	.	.	.	541	2,289	7,830	8,256	8,109	5,547	.	3	1
4: Bilateral (both breasts)	5,912	4,562	7,386	11,085	14,250	7,309	4,956	4,607	5,610	5,220	4,784	4,934	4,846
5: Yes, woman-level information only	3,191	4,800	12,581	16,151	19,386	23,973	18,409	17,844	17,000	5,290	3,908	4,778	4,452
Missing	28,671	24,096	19,131	6,658	6,252	17,619	27,685	22,851	32,857	30,290	26,131	30,557	28,328

[Index of Tables]

Breast density

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008
Missing	186,446	206,937	250,509	240,174	248,143	251,500	280,826	274,868	276,940	174,733	137,335	118,002	106,067
1: Almost entirely fat (<25% fibroglandular)	24,290	31,757	37,303	37,149	36,720	38,720	37,711	38,956	38,455	34,999	29,024	33,311	36,297
2: Scattered fibroglandular tissue (25% - 50%)	104,704	152,376	200,618	220,109	216,342	221,486	235,049	233,930	225,406	195,014	149,657	151,404	143,068
3: Heterogeneously dense (50% - 75%)	78,634	125,143	170,017	195,359	207,857	212,177	219,124	204,247	190,409	171,598	146,833	154,827	132,182
4: Extremely dense (>75%)	21,849	30,702	38,166	38,498	40,912	40,707	40,766	39,461	36,125	32,805	30,127	32,619	29,803

Exams by year
One site contributes either no data or incomplete data for years 2004+.
Another site contributes either no data or incomplete data for years 2005+.
Data may not be complete for 2008 at all remaining sites.

[Index of Tables]

Radiologists

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008
	421	562	589	619	604	534	557	573	536	491	407	375	367

Unique radiologists per year
One site contributes either no data or incomplete data for years 2004+.
Another site contributes either no data or incomplete data for years 2005+.
Data may not be complete for 2008 at all remaining sites.

[Index of Tables]

Facilities where mammograms were taken

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008
	243	256	224	200	188	182	175	175	170	151	109	103	102

Unique facilities per year
One site contributes either no data or incomplete data for years 2004+.
Another site contributes either no data or incomplete data for years 2005+.
Data may not be complete for 2008 at all remaining sites.

[Index of Tables]

Facilities where mammograms were read

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008
	139	151	151	146	149	142	139	143	136	124	91	81	79

[Index of Tables]

Age

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008
18-24	524	620	922	1,318	1,572	1,486	1,554	1,560	1,494	1,006	645	626	551
25-29	1,456	1,634	2,493	3,192	3,209	3,176	2,968	2,916	2,681	1,924	1,355	1,331	1,171
30-34	5,316	5,846	8,471	9,063	9,331	9,589	9,512	8,574	7,725	5,088	3,923	3,627	3,280
35-39	23,095	27,315	37,486	38,953	39,163	38,458	36,669	32,084	28,606	20,319	16,264	15,086	12,946
40-44	58,636	78,834	103,166	107,224	109,746	110,201	115,299	109,257	104,621	79,122	63,364	59,977	53,866
45-49	65,759	86,525	110,784	116,087	119,459	120,821	127,888	122,965	118,936	90,482	73,038	71,174	65,563
50-54	62,929	87,726	112,570	117,893	122,677	128,059	133,619	128,208	123,472	96,052	77,447	76,077	69,158
55-59	49,183	65,403	82,862	87,742	91,409	95,350	109,857	110,898	109,863	89,713	74,223	73,006	66,408
60-64	41,386	53,543	65,508	68,597	70,568	73,148	80,186	81,093	81,252	67,290	55,410	59,989	56,870
65-69	38,637	49,492	59,419	60,472	60,960	61,119	65,249	64,722	64,016	53,839	43,272	44,527	42,343
70-74	32,884	42,075	51,523	53,327	52,882	52,569	55,643	53,669	51,457	42,727	33,598	34,015	31,171
75-79	21,633	28,465	36,213	39,217	40,068	40,034	42,264	41,755	40,056	33,131	26,510	26,496	23,581
80-84	10,290	13,794	17,530	19,142	19,960	21,193	22,806	23,433	22,879	19,697	16,257	16,295	13,687
85-89	3,485	4,680	6,314	7,085	7,338	7,584	8,090	8,366	8,396	7,133	6,211	6,457	5,479
90+	707	954	1,336	1,589	1,619	1,719	1,812	1,938	1,866	1,608	1,433	1,459	1,315

[Index of Tables]

Race

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008
1: White, non-Hispanic	301,751	391,345	477,781	501,437	517,218	522,156	556,389	538,109	510,255	430,063	356,040	351,966	317,439
2: Black, non-Hispanic	17,751	25,804	34,445	37,900	40,046	40,792	45,572	41,549	35,534	33,561	33,360	33,436	29,216
3: Asian	12,459	21,465	28,468	29,534	32,697	35,336	40,883	39,207	42,369	44,681	45,410	48,136	49,851
4: Native Hawaiian or Pacific Islander	31	47	44	57	87	192	320	391	443	414	336	380	368
5: American Indian or Alaska Native	9,901	10,484	8,887	5,960	6,072	5,908	7,405	7,737	8,629	5,588	1,583	1,430	1,294
6: Other	1,834	2,652	2,929	3,303	3,274	3,512	3,667	3,543	3,256	2,917	2,799	2,849	2,757
7: Mixed (2+ races)	805	1,517	2,455	2,700	3,012	4,190	5,046	5,006	6,017	6,506	6,030	6,180	6,027
8: Hispanic	40,773	48,030	56,527	58,928	58,548	64,265	68,635	69,651	71,374	50,975	19,081	19,496	19,284
Missing	30,618	45,571	85,077	91,470	89,020	88,239	85,559	86,269	89,458	34,444	28,337	26,290	21,181

[Index of Tables]

Body mass index

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008
Missing	223,195	287,853	407,782	428,093	439,693	432,602	444,360	413,382	355,028	244,624	225,812	214,766	183,781
18.5 or less (Underweight)	3,782	4,895	5,402	5,566	5,590	5,925	6,433	6,342	7,229	6,712	4,953	5,293	5,280
18.5 - 24.9 (Normal)	92,372	122,638	136,604	144,192	144,438	154,713	167,882	171,465	192,789	170,677	121,724	126,195	121,561
25.0 - 29.9 (Overweight)	59,372	79,200	88,323	91,872	94,330	100,132	112,295	114,925	121,934	106,394	76,826	78,552	74,326
30.0 - 34.9 (Obese I)	24,944	34,446	38,256	40,042	42,399	45,469	52,167	53,657	56,828	49,467	37,614	38,409	36,595
35.0 - 39.9 (Obese II)	7,975	11,704	12,981	13,739	15,103	16,306	19,152	20,053	21,050	19,232	15,814	16,201	15,478
40 or greater (Obese III)	4,283	6,179	7,265	7,785	8,421	9,443	11,187	11,638	12,477	12,043	10,233	10,747	10,396

[Index of Tables]

Highest level of education completed

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008
Missing	153,018	170,971	222,886	229,220	231,074	246,711	259,655	258,941	260,131	162,102	86,964	87,013	78,225
1: < High school graduate	25,751	36,907	47,665	51,729	51,955	49,295	50,194	46,712	43,619	37,837	31,807	30,376	27,022
2: High school graduate or GED	72,142	102,253	127,356	131,659	135,492	131,895	139,688	132,584	124,003	104,613	90,488	87,604	76,706
3: Some college/technical school	74,987	105,485	129,982	138,252	141,724	140,861	150,213	143,889	136,352	118,658	106,810	105,684	94,453
4: College or post-college graduate	90,025	131,299	168,724	180,429	189,729	195,828	213,726	209,336	203,230	185,939	176,907	179,486	171,011

[Index of Tables]

Menopause

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008
1: Yes	240,054	320,954	406,423	426,530	429,993	433,734	464,042	450,824	439,450	366,132	296,869	299,447	273,374
0: No	80,658	119,745	156,764	167,788	171,137	180,948	194,847	182,538	168,931	150,917	129,084	127,420	120,648
Missing	95,211	106,216	133,426	136,971	148,844	149,908	154,587	158,100	158,954	92,100	67,023	63,296	53,395

[Index of Tables]

Current hormone therapy use

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008
0: No	170,729	272,568	376,121	402,180	398,942	417,193	461,936	484,829	486,320	451,943	377,654	380,725	358,752
1: Yes	76,803	118,021	164,295	175,528	170,915	168,466	153,684	106,601	82,389	61,104	36,153	32,277	27,562
Missing	168,391	156,326	156,197	153,581	180,117	178,931	197,856	200,032	198,626	96,102	79,169	77,161	61,103

[Index of Tables]

Previous breast cancer

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008
0: No	259,978	311,020	337,170	360,658	376,043	465,191	567,359	563,250	546,237	487,207	402,141	406,978	381,280
1: Yes	29,808	40,656	50,917	58,427	63,641	53,327	50,763	49,758	47,986	40,440	33,469	34,574	32,428
Missing	126,137	195,239	308,526	312,204	310,290	246,072	195,354	178,454	173,112	81,502	57,366	48,611	33,709

[Index of Tables]

Family history of breast cancer

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008
0: No	248,148	309,446	400,008	398,404	366,801	513,917	547,852	525,579	508,078	450,994	366,400	368,668	344,790
1: Yes	43,228	54,722	71,568	78,867	82,426	85,851	93,608	94,600	95,356	85,654	70,774	72,974	69,560
Missing	124,547	182,747	225,037	254,018	300,747	164,822	172,016	171,283	163,901	72,501	55,802	48,521	33,067

[Index of Tables]

Ever given birth

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008
Missing	165,309	226,569	340,748	356,830	373,458	381,567	401,735	383,323	348,062	236,265	200,144	192,990	163,340
0: No	44,716	55,009	63,656	69,345	74,010	69,609	74,076	73,454	76,711	71,333	62,208	66,703	68,415
1: Yes	205,898	265,337	292,209	305,114	302,506	313,414	337,665	334,685	342,562	301,551	230,624	230,470	215,662

[Index of Tables]

Age at first birth

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008
Missing	170,281	235,176	349,220	364,583	380,649	389,263	410,143	403,254	369,050	254,425	204,785	198,383	168,962
Nulliparous	44,586	54,741	63,318	69,025	73,620	69,169	73,596	72,974	76,162	70,505	61,134	62,698	61,921
< 20	26,572	39,109	47,832	52,638	53,042	52,616	56,259	52,203	52,701	46,934	36,605	36,243	33,229
20-24	49,105	70,401	81,698	87,993	87,972	84,827	88,365	82,702	81,145	73,999	60,334	58,357	52,468
25-29	26,274	38,476	44,215	48,975	49,036	46,797	49,017	46,758	46,303	44,057	37,920	37,931	34,586
30-34	10,078	15,131	17,572	19,598	20,054	18,561	20,064	19,568	19,658	18,731	16,406	16,824	15,909
35-39	3,565	4,992	5,916	6,615	6,795	6,204	6,807	6,680	6,776	6,750	5,913	6,104	6,134
40+	969	1,520	2,162	2,389	2,574	2,534	3,061	3,063	3,421	3,776	3,767	4,232	4,472
Age only reported as <30	72,167	73,742	69,575	64,264	59,952	76,274	84,625	83,657	88,568	66,713	42,016	43,536	42,993
Age only reported as >=30	12,326	13,627	15,105	15,209	16,280	18,345	21,539	20,603	23,551	23,259	24,096	25,855	26,743

[Index of Tables]

Age at menarche

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008
Missing	317,587	390,109	510,579	534,724	541,944	547,170	582,419	561,967	537,507	373,457	267,361	266,502	242,174
No menarche	32	55	54	57	73	104	95	112	138	115	130	144	119
Age only reported as <=10	1,403	4,285	5,413	5,511	5,523	3,390	2,340	2,454	2,706	2,645	2,772	4,626	4,273
<=12	40,935	65,670	78,227	82,784	87,760	91,386	96,910	96,173	95,805	98,659	93,813	90,894	83,052
15+	11,273	17,336	20,399	21,477	22,772	24,593	26,168	25,969	25,847	27,265	26,051	26,407	24,769
13	31,017	48,247	56,807	60,079	63,987	68,504	74,198	73,819	74,234	75,179	72,394	71,458	65,186
14	13,676	21,213	25,134	26,657	27,915	29,443	31,346	30,968	31,098	31,829	30,455	30,132	27,844

[Index of Tables]

Covered by Medicare

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008
Missing	119,590	253,281	274,560	234,684	252,777	363,979	412,980	429,628	461,060	421,299	337,644	342,003	314,637
0: No	248,018	232,372	342,824	405,564	405,558	322,750	319,579	284,629	242,297	143,663	117,530	111,441	100,968
1: Yes	48,315	61,262	79,229	91,041	91,639	77,861	80,917	77,205	63,978	44,187	37,802	36,719	31,812

[Index of Tables]

Covered by Medicaid

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008
Missing	144,361	273,603	305,081	272,355	288,609	367,723	415,930	432,537	463,786	421,652	337,643	341,985	314,634
0: No	265,411	263,577	377,578	442,063	446,904	385,987	384,931	346,907	294,131	180,649	149,394	142,693	127,891
1: Yes	6,151	9,735	13,954	16,871	14,461	10,880	12,615	12,018	9,418	6,848	5,939	5,485	4,892

[Index of Tables]

Covered by private insurance

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008
Missing	356,618	431,605	555,996	569,430	581,259	665,464	715,972	700,296	697,966	561,548	466,828	467,564	431,090
0: No	12,175	39,653	54,635	71,822	76,154	66,818	61,280	56,820	41,484	28,863	17,040	14,880	10,755
1: Yes	47,130	75,657	85,982	90,037	92,561	32,308	36,224	34,346	27,885	18,738	9,108	7,719	5,572

[Index of Tables]

Covered by managed care insurance

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008
Missing	357,564	442,136	576,784	597,755	612,617	630,412	681,100	651,913	646,809	514,864	420,020	420,105	386,091
0: No	16,170	43,847	55,231	62,650	61,901	57,055	53,173	61,922	56,426	35,165	21,544	19,285	14,370
1: Yes	42,189	60,932	64,598	70,884	75,456	77,123	79,203	77,627	64,100	59,120	51,412	50,773	46,956

[Index of Tables]

Maintained by the Applied Research Program,
Division of Cancer Control and Population Sciences