Table 1.

Demographic and study characteristics by quartile of the AHEI-2010. Counts and means (SD) are presented for categorical and continuous variables, respectively. T-test and chi-square tests were used to examine differences by AHEI-2010 quartile. Quartiles defined as follows: Q1 is <42.7, Q2 is 42.7–49.2, Q3 is 49.3–56.7 and Q4 is >56.7

	n	Quartile 1	Quartile 2	Quartile 3	Quartile 4	P-value
WHI Ancillary Study
EMPC	1613	421	419	400	373	<0.0001
BAA23	1914	524	483	459	448
AS311	828	155	174	204	295
Clinical trial participant
Yes	3536	926	918	861	831	<0.0001
No	819	163	170	228	258
Case/control status (BAA23)
Case	948	267	234	239	208	0.01
Control	966	254	254	225	233
Case/control status (AS311)
Case	416	78	84	106	148	<0.0001
Control	412	77	91	109	135
Study year
Baseline	4097	1039	1028	1019	1011	0.29
3 years	163	31	37	46	49
6 years	95	19	23	24	29
Age (years), mean (SD)	64.0 (7.11)	62.4 (7.1)	64.1 (7.1)	64.3 (7.0)	65.1 (7.0)	<0.0001
Race/Ethnicity
White	2495	501	639	628	727	<0.0001
African-American	1076	369	261	252	194
Hispanic/Latino	610	190	153	157	110
Asian or Pacific Islander	105	8	18	27	52
American Indian or Alaskan Native	38	13	11	12	2
Other	30	8	6	12	4
BMI (kg/m2) mean (SD)	29.3 (6.1)	30.8 (6.4)	29.7 (6.2)	29.0 (5.9)	27.9 (5.5)	<0.0001
BMI categories
Underweight	23	2	5	10	6	<0.0001
Normal	1060	177	246	281	356
Overweight	1506	356	380	379	391
Obese	1735	544	449	411	331
Smoking status
Former and current	2108	507	508	549	544	0.15
No	2204	569	570	530	535
Income
<$20 000	1007	326	276	222	183	<0.0001
$20 000–$49 999	1888	481	464	488	455
>$50 000	1196	215	275	310	396