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Distribution of Key Variables

Women

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
	371,341	493,938	609,237	626,482	639,364	642,555	683,134	655,104	631,922	493,212	352,546

Unique women per year
2004 does not include data from one of the sites
2005+ does not include data from two of the sites
Data are not complete for 2006 at remaining sites

[Index of Tables]

Breast cancers

	Diagnosis year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
	5,174	5,585	6,222	6,639	6,582	6,950	6,874	6,967	6,651	5,953	2,736

Unique diagnoses
2004 does not include data from one of the sites
2005+ does not include data from two of the sites
Data are not complete for 2006 at remaining sites

[Index of Tables]

Exams

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
	420,426	557,322	685,304	719,676	736,814	746,431	793,975	760,515	730,733	556,743	390,610

All exams by year
2004 does not include data from one of the sites
2005+ does not include data from two of the sites
Data are not complete for 2006 at remaining sites

[Index of Tables]

Indication for exam

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
1: Routine screening	354,405	468,794	534,370	536,900	530,047	530,823	573,283	545,529	519,950	445,799	315,865
2: Additional evaluation	23,413	28,876	36,400	43,532	44,298	51,281	51,325	50,101	44,753	34,806	23,598
3: Short interval follow-up	8,209	14,783	21,205	23,861	25,282	25,419	25,670	23,380	20,340	17,255	13,041
4: Evaluation	29,915	39,748	52,568	59,936	59,679	59,450	62,379	60,850	58,771	47,490	26,683
5: Other	69	608	946	1,397	2,200	1,814	3,020	3,653	2,234	1,474	823
Missing	4,415	4,513	39,815	54,050	75,308	77,644	78,298	77,002	84,685	9,919	10,600

All exams by year
2004 does not include data from one of the sites
2005+ does not include data from two of the sites
Data are not complete for 2006 at remaining sites

[Index of Tables]

Symptoms (self-reported)

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
0: No symptoms	281,633	391,442	514,204	522,960	517,926	539,146	569,412	530,721	508,705	440,413	319,889
1: Pain	4,336	3,877	3,115	4,176	6,846	12,821	15,093	12,918	13,042	12,608	9,957
2: Other	12,117	14,890	19,879	20,092	17,376	14,337	13,266	13,041	13,142	12,269	7,193
3: Nipple discharge	2,199	2,696	2,987	3,151	2,738	3,295	3,611	3,148	2,943	2,463	1,888
4: Lump	20,502	23,516	31,264	37,333	36,330	38,003	36,432	31,916	27,436	22,253	13,710
5: Symptoms, not otherwise specified	4,289	4,436	6,213	5,305	3,998	796	389	360	412	507	324
Missing	95,350	116,465	107,642	126,659	151,600	138,033	155,772	168,411	165,053	66,230	37,649

All exams by year
2004 does not include data from one of the sites
2005+ does not include data from two of the sites
Data are not complete for 2006 at remaining sites

[Index of Tables]

Time since last mammogram

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
0: No previous mammogram	30,173	37,698	45,554	44,568	41,298	38,271	33,441	27,833	24,776	21,242	16,597
1: Within a year (0-11 months)	59,977	78,096	106,524	123,093	123,992	126,377	134,890	127,075	119,942	87,420	58,635
2: 1-2 years (12-35 months)	249,017	338,222	402,706	442,897	466,920	475,271	502,092	494,947	476,579	369,579	262,293
3: 3-4 years (36-59 months)	29,327	37,644	42,661	37,032	36,029	38,669	42,595	37,723	38,883	31,901	22,542
4: Five years or more (60+ months)	15,005	22,795	26,468	23,626	21,551	20,920	21,804	20,850	23,540	19,066	13,186
Missing	36,927	42,867	61,391	48,460	47,024	46,923	59,153	52,087	47,013	27,535	17,357

All exams by year
2004 does not include data from one of the sites
2005+ does not include data from two of the sites
Data are not complete for 2006 at remaining sites

[Index of Tables]

Time since last clinical breast exam

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
0: None within the last 3 months / No other information	143	939	1,394	8,679	19,506	58,975	69,905	71,929	82,522	84,571	84,600
1: Within the last 3 months	24,859	16,023	3,405	10,699	22,057	88,566	112,357	107,475	118,023	114,338	96,455
2: 4 months to 1 year ago	11,587	7,204	889	899	.	12,759	23,886	23,368	21,157	20,930	14,021
3: More than 1 year ago	23,262	30,081	23,739	23,774	22,860	15,022	21,229	21,387	21,085	22,601	18,830
4: Never had a clinical breast exam	3,672	2,319	609	376	280	452	725	632	634	743	597
5: Within the last year	42,796	82,538	86,543	93,264	90,520	14,943	195	5	.	1	.
Missing	314,107	418,218	568,725	581,985	581,591	555,714	565,678	535,719	487,312	313,559	176,107

All exams by year
2004 does not include data from one of the sites
2005+ does not include data from two of the sites
Data are not complete for 2006 at remaining sites

[Index of Tables]

Any mammogram performed

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
0: No	10,159	9,330	20,645	31,768	32,934	34,831	36,938	37,482	47,355	25,627	11,077
1: Yes	408,798	545,409	660,152	678,125	692,052	701,285	745,887	713,965	682,307	529,681	378,309
Missing	1,469	2,583	4,507	9,783	11,828	10,315	11,150	9,068	1,071	1,435	1,224

All exams by year
2004 does not include data from one of the sites
2005+ does not include data from two of the sites
Data are not complete for 2006 at remaining sites

[Index of Tables]

Digital mammograms

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
0: No (other radiologic or non-imaging procedure)	353,157	460,285	551,093	560,517	563,530	558,670	576,589	549,776	669,105	476,082	275,473
1: Right breast only	.	.	.	.	1	247	1,036	2,097	2,916	3,239	3,783
2: Left breast only	.	.	.	.	1	243	1,115	2,016	2,921	3,296	3,863
4: Bilateral (both breasts)	.	.	.	.	3	1,337	9,926	29,567	48,764	59,988	59,224
5: Yes, woman-level information only	.	.	.	.	1	1,752	5,246	5,237	1,657	8,921	45,937
Missing	67,269	97,037	134,211	159,159	173,278	184,182	200,063	171,822	5,370	5,217	2,330

All exams by year
2004 does not include data from one of the sites
2005+ does not include data from two of the sites
Data are not complete for 2006 at remaining sites

[Index of Tables]

Ultrasounds

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
0: No	361,811	482,921	614,959	652,925	666,612	661,468	691,780	666,201	625,401	471,107	331,711
1: Right breast only	2,668	5,128	7,707	9,644	8,863	10,844	14,148	13,371	12,614	10,809	8,273
2: Left breast only	3,047	5,831	8,725	10,806	9,763	12,494	15,713	14,544	14,381	12,070	9,185
3: Unilateral, side not specified	.	.	.	.	.	.	5,745	6,578	7,864	5,546	.
4: Bilateral (both breasts)	5,894	4,480	7,333	10,985	14,209	7,311	4,679	4,383	5,294	4,712	3,824
5: Yes, woman-level information only	3,191	4,781	12,392	15,946	19,069	23,453	17,728	17,139	15,926	4,173	2,755
Missing	43,815	54,181	34,188	19,370	18,298	30,861	44,182	38,299	49,253	48,326	34,862

All exams by year
2004 does not include data from one of the sites
2005+ does not include data from two of the sites
Data are not complete for 2006 at remaining sites

[Index of Tables]

Breast density

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
1: Almost entirely fat (<25% fibroglandular)	21,741	29,017	33,774	34,482	31,600	36,996	35,503	36,112	35,615	32,015	22,516
2: Scattered fibroglandular tissue (25% - 50%)	89,792	138,762	175,046	200,570	188,657	204,191	217,197	214,332	201,801	166,623	103,860
3: Heterogeneously dense (50% - 75%)	68,554	114,238	150,944	175,906	181,886	195,583	202,033	181,660	164,408	141,262	98,662
4: Extremely dense (>75%)	19,896	28,459	35,123	35,138	36,520	37,967	37,684	35,137	31,263	27,555	21,701
Missing	77,053	76,651	75,102	51,701	43,178	49,243	50,538	47,371	50,231	46,755	49,608

Exams by year
Only includes breast density measured using the BI-RADS system
2004 does not include data from one of the sites
2005+ does not include data from two of the sites
Data are not complete for 2006 at remaining sites

[Index of Tables]

Radiologists

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
	424	518	531	546	547	545	572	582	542	468	372

Unique radiologists per year
2004 does not include data from one of the sites
2005+ does not include data from two of the sites
Data are not complete for 2006 at remaining sites

[Index of Tables]

Facilities where mammograms were taken

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
	241	252	220	195	185	179	171	173	163	142	102

Unique facilities per year
2004 does not include data from one of the sites
2005+ does not include data from two of the sites
Data are not complete for 2006 at remaining sites

[Index of Tables]

Facilities where mammograms were read

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
	137	148	148	143	146	139	136	140	133	120	88

Unique facilities per year
2004 does not include data from one of the sites
2005+ does not include data from two of the sites
Data are not complete for 2006 at remaining sites

[Index of Tables]

Age

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
18-24	524	610	896	1,272	1,500	1,403	1,471	1,472	1,351	820	492
25-29	1,460	1,648	2,440	3,129	3,092	3,069	2,889	2,789	2,510	1,707	1,072
30-34	5,366	5,868	8,335	8,944	9,139	9,284	9,199	8,259	7,357	4,524	2,996
35-39	23,428	27,710	36,974	38,360	38,516	37,723	35,834	30,893	27,329	18,231	12,693
40-44	59,575	80,454	101,636	105,712	107,876	107,746	113,061	105,295	99,805	71,895	50,921
45-49	66,674	88,295	109,108	114,293	117,394	118,111	125,008	118,352	113,399	82,389	58,227
50-54	63,530	89,571	110,788	116,022	120,511	125,050	130,410	123,084	117,315	87,883	61,592
55-59	49,539	66,685	81,439	86,279	89,768	92,963	107,150	106,495	104,553	82,126	59,124
60-64	41,601	54,422	64,259	67,358	69,268	71,260	78,168	77,855	77,391	61,647	43,856
65-69	39,165	50,549	58,352	59,407	59,830	59,552	63,543	62,016	60,858	49,399	33,702
70-74	33,340	42,943	50,619	52,464	51,989	51,316	54,204	51,542	49,130	39,250	26,078
75-79	21,775	28,976	35,624	38,602	39,411	39,125	41,166	40,085	38,150	30,548	20,786
80-84	10,271	13,908	17,263	18,855	19,663	20,672	22,152	22,464	21,810	18,181	12,924
85-89	3,468	4,725	6,237	7,030	7,248	7,380	7,883	8,014	7,969	6,636	4,969
90+	707	951	1,316	1,563	1,593	1,688	1,773	1,875	1,790	1,489	1,154
Missing	3	7	18	386	16	89	64	25	16	18	24

All exams by year
2004 does not include data from one of the sites
2005+ does not include data from two of the sites
Data are not complete for 2006 at remaining sites

[Index of Tables]

Race

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
1: White, non-Hispanic	302,496	396,864	471,702	494,454	509,237	509,957	542,515	517,523	482,610	389,800	280,396
2: Black, non-Hispanic	16,260	25,089	32,976	36,182	38,264	38,595	42,242	36,648	28,832	24,410	19,875
3: Asian	9,667	21,375	28,173	29,224	32,315	34,700	40,062	38,212	41,027	42,019	41,719
4: Native Hawaiian or Pacific Islander	28	36	33	46	75	168	277	349	383	350	239
5: American Indian or Alaska Native	10,041	10,617	8,896	5,941	6,045	5,869	7,322	7,301	7,301	5,292	1,240
6: Other	1,764	2,694	2,928	3,271	3,196	3,384	3,541	3,440	2,998	2,635	2,123
7: Mixed (2+ races)	694	1,435	2,367	2,632	2,866	3,993	4,833	4,794	5,619	5,973	5,162
8: Hispanic	43,818	52,099	56,310	58,730	58,283	63,723	67,942	68,858	70,109	48,836	17,011
Missing	35,658	47,113	81,919	89,196	86,533	86,042	85,241	83,390	91,854	37,428	22,845

All exams by year, Column percents
2004 does not include data from one of the sites
2005+ does not include data from two of the sites
Data are not complete for 2006 at remaining sites

[Index of Tables]

Body mass index

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
18.5 or less (Underweight)	3,945	4,990	5,209	5,389	5,437	5,756	6,259	6,172	7,056	6,458	4,562
18.5 - 24.9 (Normal)	99,135	129,813	136,390	144,001	143,726	153,066	166,018	169,873	190,072	166,464	113,618
25.0 - 29.9 (Overweight)	63,769	83,999	88,508	91,911	93,870	98,949	111,134	113,907	120,115	103,572	70,954
30.0 - 34.9 (Obese I)	26,495	36,110	38,184	40,005	42,106	44,755	51,525	53,015	55,666	47,967	34,491
35.0 - 39.9 (Obese II)	8,347	12,155	13,043	13,766	15,018	16,002	18,889	19,755	20,552	18,576	14,346
40 or greater (Obese III)	4,433	6,369	7,270	7,774	8,370	9,304	11,011	11,415	12,137	11,531	9,322
Missing	214,302	283,886	396,700	416,830	428,287	418,599	429,139	386,378	325,135	202,175	143,317

All exams by year
2004 does not include data from one of the sites
2005+ does not include data from two of the sites
Data are not complete for 2006 at remaining sites

[Index of Tables]

Highest level of education completed

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
1: < High school graduate	24,355	36,326	46,906	51,029	51,402	48,280	48,518	44,969	41,457	35,624	25,775
2: High school graduate or GED	70,163	101,214	126,004	130,326	134,316	129,514	136,442	127,620	118,370	98,655	71,227
3: Some college/technical school	72,660	104,707	128,772	137,062	140,469	138,044	146,751	137,629	129,128	110,588	86,569
4: College or post-college graduate	86,344	130,518	167,415	178,990	187,920	192,330	209,158	201,457	194,227	174,721	151,244
Missing	166,904	184,557	216,207	222,269	222,707	238,263	253,106	248,840	247,551	137,155	55,795

All exams by year
2004 does not include data from one of the sites
2005+ does not include data from two of the sites
Data are not complete for 2006 at remaining sites

[Index of Tables]

Menopause

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
0: No	78,107	119,212	155,509	166,405	169,198	176,071	189,978	178,197	163,593	142,688	105,585
1: Yes	259,545	351,424	428,797	448,099	453,255	458,476	491,379	471,101	455,486	366,566	253,276
Missing	82,774	86,686	100,998	105,172	114,361	111,884	112,618	111,217	111,654	47,489	31,749

All exams by year
2004 does not include data from one of the sites
2005+ does not include data from two of the sites
Data are not complete for 2006 at remaining sites

[Index of Tables]

Current hormone therapy use

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
0: No	164,104	270,239	368,397	394,163	389,852	406,303	449,879	473,866	473,525	425,667	302,467
1: Yes	74,387	117,116	163,091	174,261	169,717	166,595	151,875	105,242	81,108	58,059	30,503
Missing	181,935	169,967	153,816	151,252	177,245	173,533	192,221	181,407	176,100	73,017	57,640

All exams by year
2004 does not include data from one of the sites
2005+ does not include data from two of the sites
Data are not complete for 2006 at remaining sites

[Index of Tables]

Previous breast cancer

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
0: No	251,312	310,536	336,598	360,078	374,002	466,656	574,873	570,714	550,712	474,338	333,996
1: Yes	29,358	40,363	50,274	57,608	62,800	51,837	48,587	47,925	45,534	37,239	26,373
Missing	139,756	206,423	298,432	301,990	300,012	227,938	170,515	141,876	134,487	45,166	30,241

All exams by year
2004 does not include data from one of the sites
2005+ does not include data from two of the sites
Data are not complete for 2006 at remaining sites

[Index of Tables]

Family history of breast cancer

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
0: No	242,378	313,897	440,268	518,919	507,106	499,321	531,935	510,468	490,790	420,216	292,556
1: Yes	42,142	54,461	70,332	77,527	80,751	83,626	91,189	92,402	92,535	80,662	58,150
Missing	135,906	188,964	174,704	123,230	148,957	163,484	170,851	157,645	147,408	55,865	39,904

All exams by year
2004 does not include data from one of the sites
2005+ does not include data from two of the sites
Data are not complete for 2006 at remaining sites

[Index of Tables]

Ever given birth

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
0: No	43,894	59,161	69,979	76,336	82,049	76,594	81,993	81,127	82,967	74,814	64,513
1: Yes	220,065	291,663	330,123	336,556	333,787	342,442	368,265	365,313	372,189	320,540	229,961
Missing	156,467	206,498	285,202	306,784	320,978	327,395	343,717	314,075	275,577	161,389	96,136

All exams by year
2004 does not include data from one of the sites
2005+ does not include data from two of the sites
Data are not complete for 2006 at remaining sites

[Index of Tables]

Age at first birth

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
Nulliparous	43,831	58,904	69,644	76,005	81,647	76,205	81,547	80,700	82,488	74,243	63,916
< 20	25,653	39,137	48,489	53,859	54,415	53,360	57,343	53,643	54,296	47,987	33,589
20-24	48,101	69,295	81,453	90,104	90,680	85,741	90,003	85,310	84,376	76,397	53,588
25-29	26,246	38,409	44,974	51,249	52,375	49,432	52,116	50,697	51,125	48,199	36,430
30-34	10,381	15,357	18,336	21,130	22,204	20,806	22,321	22,384	22,716	21,799	17,726
35-39	3,620	5,050	6,168	7,047	7,485	6,903	7,561	7,631	7,813	7,872	6,517
40+	895	1,692	2,365	2,571	2,783	2,740	3,307	3,337	3,685	3,926	3,862
Age only reported as <30	78,615	87,790	89,161	78,661	72,297	87,704	95,395	93,364	97,023	68,317	42,606
Age only reported as >=30	12,145	16,373	19,590	19,382	20,468	22,084	25,938	24,718	26,603	23,517	24,044
Missing	170,939	225,315	305,124	319,668	332,460	341,456	358,444	338,731	300,608	184,486	108,332

All exams by year
2004 does not include data from one of the sites
2005+ does not include data from two of the sites
Data are not complete for 2006 at remaining sites

[Index of Tables]

Age at menarche

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
No menarche	32	51	57	58	84	102	107	122	144	127	123
Age only reported as <=10	1,400	4,053	4,655	4,375	4,004	1,988	1,126	1,009	1,001	1,007	899
<=12	40,017	64,700	76,921	81,322	85,528	88,216	92,957	92,175	90,894	92,193	77,613
15+	10,726	16,763	19,638	20,789	21,786	23,462	24,635	24,467	24,018	24,449	20,606
13	30,273	47,615	56,699	60,178	64,364	67,838	72,687	72,466	72,510	72,628	61,668
14	13,187	20,823	24,570	26,219	27,281	28,566	30,095	29,550	29,555	29,623	25,194
Missing	324,791	403,317	502,764	526,735	533,767	536,259	572,368	540,726	512,611	336,716	204,507

All exams by year
2004 does not include data from one of the sites
2005+ does not include data from two of the sites
Data are not complete for 2006 at remaining sites

[Index of Tables]

Covered by Medicare

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
0: No	256,843	223,635	331,291	390,385	391,881	311,552	307,662	274,316	232,279	134,249	78,738
1: Yes	47,049	58,896	76,134	87,347	88,425	74,274	76,795	73,730	60,834	41,647	27,480
Missing	116,534	274,791	277,879	241,944	256,508	360,605	409,518	412,469	437,620	380,847	284,392

All exams by year
2004 does not include data from one of the sites
2005+ does not include data from two of the sites
Data are not complete for 2006 at remaining sites

[Index of Tables]

Covered by Medicaid

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
0: No	273,690	252,985	363,774	424,726	431,206	371,542	369,391	333,394	281,097	168,766	102,434
1: Yes	6,045	9,386	13,495	16,286	14,084	10,656	12,205	11,742	9,288	6,776	3,786
Missing	140,691	294,951	308,035	278,664	291,524	364,233	412,379	415,379	440,348	381,201	284,390

All exams by year
2004 does not include data from one of the sites
2005+ does not include data from two of the sites
Data are not complete for 2006 at remaining sites

[Index of Tables]

Covered by private insurance

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
0: No	11,902	38,471	52,949	69,523	73,819	64,612	59,297	54,867	40,161	27,735	10,951
1: Yes	45,528	72,652	81,826	84,966	87,246	31,315	35,214	33,474	27,266	18,244	5,930
Missing	362,996	446,199	550,529	565,187	575,749	650,504	699,464	672,174	663,306	510,764	373,729

All exams by year
2004 does not include data from one of the sites
2005+ does not include data from two of the sites
Data are not complete for 2006 at remaining sites

[Index of Tables]

Covered by managed care insurance

	Exam year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
0: No	15,866	42,726	53,733	60,721	59,695	54,747	51,116	59,751	54,645	33,956	13,897
1: Yes	39,518	56,566	59,140	65,297	69,034	67,641	68,581	67,514	54,039	49,175	41,284
Missing	365,042	458,030	572,431	593,658	608,085	624,043	674,278	633,250	622,049	473,612	335,429

All exams by year
2004 does not include data from one of the sites
2005+ does not include data from two of the sites
Data are not complete for 2006 at remaining sites

[Index of Tables]

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