Table 1.

Demographic, clinical, and lifestyle characteristics of 2,317 women with invasive breast cancer in the WHI by HEI-2005 quartiles

Poor-quality dietsMixed-quality dietsBetter-quality diets
Healthy Eating Index-2005 Score Quartile 1 (34–63)Healthy Eating Index-2005 Score Quartile 2 (63–71)Healthy Eating Index-2005 Score Quartile 3 (71–77)Healthy Eating Index-2005 Score Quartile 4 (77–91)
N(%)N(%)N(%)N(%)Pa
Number of participants579579580579
Age at screening for WHI
 Mean (SE)63.6 (0.3)63.6 (0.3)63.4 (0.3)63.9 (0.3)0.639
Years since diagnosis
 Mean (SE)1.6 (0.4)1.5 (0.05)1.4 (0.04)1.6 (0.04)0.366
Calories (kcals/day)
 Mean (SE)1665 (27.1)1558.7 (23.7)1454.4 (21.0)1470.2 (19.8)<0.0001
Alcohol servings/wk
 Mean (SE)3.3 (0.3)2.6 (0.2)1.7 (0.1)1.0 (0.1)<0.0001
MET-hours/week of MVPAb
 Mean (SE)8.1 (0.5)9.9 (0.5)10.6 (0.5)13.3 (0.7)<0.0001
BMIc
 Mean (SE)29.3 (0.3)28.6 (0.2)27.8 (0.2)27.0 (0.2)<0.0001
Race/ethnicity0.773
 White51088505875168952290
 Black417387285244
 Hispanic122163132132
 Other153203203193
 Unknown10102010
Education0.002
 High school or less12121941686158615
 Some college23641214372213818933
 College6511751379147713
 Postgraduate15226190331893322539
 Missing51625120
Income0.029
 ≥$50,00019934228392504324943
 $20,000–49,99925945257442374123841
 <$20,0008114691266115610
 Missing407254275366
WHI component/arm<0.0001
 WHI Observational Study26446247432784832356
 WHI-DM-control25344222381512611420
 WHI-DM-intervention6211111191502614225
Stage0.974
 Localized43675427744367544377
 Regional13223142251362312822
 Distant61413131
 Unknown51615151
Estrogen receptor status0.197
 Positive42974455794517842373
 Negative9016651172129015
 Unknown6010591057106611
Progesterone receptor status0.751
 Positive35862357623716434960
 Negative15326153261352315026
 Unknown6812691274138014
Postmenopausal hormone therapy0.122
 Never21337195371923318933
 Past8615911771126912
 Current28048293513175532155
  • aP for χ2 test for categorical variables or trend test for continuous variables.

  • bFor 2,149 of 2,317 participants with known MVPA.

  • cFor 2,297 of 2,317 participants with known measured BMI.