Table 1.

Characteristics of study population, stratified by ethnicity and case-control status, 4-CBCS, 1999–2004 (n = 3,908)

	Non-Hispanic white (n = 2,574)					Hispanic (n = 1,334)					p valueb
	Case		Control		p valuea	Case		Control		p valuea
	No.	Percentage	No.	Percentage		No.	Percentage	No.	Percentage
Total subjects	1,244		1,330			606		728
Center					0.08					0.33	<0.001
Arizona	171	13.6	263	19.8		123	20.3	164	22.5
Colorado	257	20.7	218	16.4		120	19.8	132	18.1
New Mexico	494	39.7	496	37.3		263	43.4	251	34.5
Utah	322	25.9	353	26.5		100	16.5	181	24.9
Education level					0.21					0.05	<0.001
High school or less	310	24.9	353	26.5		348	57.4	390	53.6
Some college	459	36.9	499	37.5		172	28.4	203	27.9
Bachelor degree/higher	475	38.2	478	35.9		86	14.2	135	18.5
Parity					<0.001					0.07	<0.001
Nulliparous	210	16.9	188	14.1		57	9.4	70	9.6
1–2	543	43.7	541	40.7		247	40.8	251	34.5
3–1	400	32.2	458	34.4		217	35.8	285	39.2
5+	91	7.3	143	10.8		85	14.0	122	16.8
Menopausal status					0.07					0.20	<0.001
Pre-/peri-menopausal	430	34.6	415	31.2		243	40.1	267	36.7
Post-menopausal	814	65.4	915	68.8		363	59.9	461	63.3
Recent estrogen usec					0.04					0.23	0.1043
Yes	992	79.7	1,016	76.4		468	77.2	542	74.5
No	252	20.2	314	23.6		138	22.8	186	25.6
Family history, 1st degree					<0.001					0.01	0.0045
Yes	277	22.5	201	15.4		107	18.0	90	12.7
No	952	77.5	1,106	84.6		486	82.0	617	87.3
Diabetes history					0.42					0.71	<0.001
Yes	91	7.3	113	8.5		90	14.9	110	15.1
Borderline	22	1.8	15	1.1		12	2.0	21	2.9
No	1,130	91.0	1,200	90.4		504	83.2	596	82.0
Body mass index (kg/m 2)d					0.30					0.06	<0.001
<25	578	46.5	601	45.4		198	32.7	204	28.1
25–29.9	370	29.7	379	28.6		212	35.0	259	35.7
30+	296	23.8	345	26.0		196	32.3	263	36.2

	Non-Hispanic white (n = 2,574)					Hispanic (n = 1,334)					p valuef
	Case		Control		p valuee	Case		Control		p valuee
	Mean	(sd)	Mean	(sd)		Mean	(sd)	Mean	(sd)
Age (years)	55.4	11.0	56.2	12.2	0.09	52.6	11.1	54.0	12.0	0.03	<0.001
Body mass index (kg/m2)c	26.8	6.0	27.0	6.2	0.62	28.1	6.0	29.0	6.2	0.01	<0.001
Total METs (minutes/week)	1,430	1,738	1,486	1,816	0.43	1,312	1,940	1,233	1,754	0.44	0.002
Calories (kilocalories)	2,180	1,032	2,101	984	0.05	2,737	1,414	2,684	1,439	0.50	<0.001

Percentages may not add up to 100 due to rounding

METs metabolic equivalent for task

^aCase–control comparison within ethnicity. Mantel–Haenszel χ² p values from χ² tests

^bEthnic group comparison, regardless of case–control status. Mantel–Haenszel χ² p values from χ² tests

^cRecent hormone exposure, within 2 years of referent year (1 year prior to date of diagnosis for cases and 1 year prior to date of selection for controls)

^dBody mass index (BMI) calculated as kilograms (kg)/meters (m)²

^eCase–control comparison within ethnic group, p values from t tests

^fEthnic group comparison, regardless of case–control status, p values from t tests