Table 1.

Selected characteristics of cohort members at baseline and by response to the 2004 follow-up questionnaire, Iowa Women’s Health Study

					At 2004 follow-up
	All cohort members at baseline 19861 (n=38,006)		Died before 2004 follow-up (n=10,049)		Non-respondents/ Ineligible respondents (n=10,572)		Eligible Respondents (n=17,385)
	n	%	n	%	n	%	n	%
Baseline characteristics
Age > 65 years	11,094	29.2	4500	44.8	3218	30.4	3376	19.4
Post secondary education	14,720	38.7	3524	35.1	3626	34.3	7570	43.5
General health, excellent	9272	24.4	1517	15.1	2435	23.0	5320	30.6
Body mass index >=30	8928	23.5	2763	27.5	2439	23.1	3726	21.4
Cigarette smoking, never	24,642	64.8	5383	53.6	7181	67.9	12,078	69.5
Physical activity, low	17,632	46.4	5188	51.6	4803	45.4	7641	44.0
Diabetes	2363	6.2	1330	13.2	480	4.5	553	3.2
High blood pressure	13,982	36.8	4681	46.6	3823	36.2	5478	31.5
Heart disease	3391	8.9	1519	15.1	789	7.5	1083	6.2
Heart attack	1189	3.1	689	6.9	207	2.0	293	1.7
Fracture	5236	13.8	1680	16.7	1413	13.4	2143	12.3
Rheumatoid arthritis2	3011	7.9	904	9.0	784	7.4	1323	7.6
Parkinson’s disease2	144	0.4	87	0.9	31	0.3	26	0.2
Cancer characteristics 1986–2004
Cancer type,
None	29,836	78.5	6104	60.7	9064	85.7	14668	84.4
Breast	2563	6.7	711	7.1	619	5.9	1233	7.0
Colorectal	1280	3.4	562	5.6	247	2.3	471	2.7
GU	352	0.9	165	1.6	64	0.6	123	0.7
Gynecologic	964	2.5	454	4.5	170	1.6	340	2.0
Lung	824	2.2	711	7.1	47	0.4	66	0.4
Hematopoietic	374	1.0	256	2.6	37	0.4	74	0.4
Lymphoma	384	1.0	225	2.2	52	0.5	107	0.6
Other GI	455	1.2	401	4.0	23	0.2	31	0.2
Skin	255	0.7	57	0.6	59	0.6	139	0.8
Other	628	1.7	403	4.0	92	0.9	133	0.8
Stage at diagnosis3
In situ	607	7.4	115	2.9	153	10.1	339	12.5
Local	3534	43.2	1037	26.3	843	55.9	1654	60.9
Regional	1669	20.4	890	22.6	276	18.3	503	18.5
Distant	1780	21.8	1515	38.4	102	6.8	163	6.0
Unknown	580	7.1	388	9.8	134	8.9	58	2.1
Cancer Therapy Received3
% surgery	6001	73.5	2229	56.5	1259	83.5	2513	92.5
% chemotherapy	1837	22.5	1166	29.6	206	13.7	465	17.1
% radiation therapy	1735	21.2	893	22.6	297	19.7	545	20.1

¹Excluding participants who reported cancer at baseline

²Measured in 1992

³Among women diagnosed with cancer