Table 1.

Baseline characteristics of HEAL breast cancer survivors according to average MET-h/wk of recreational aerobic activity reported for year prior to breast cancer diagnosis

Physical activity, year prior to diagnosis
ALL0 MET-h/wk>0–9 MET-h/wk≥9 MET-h/wk
n = 236n = 167n = 227
VariableMeanSDMeanSDMeanSDMeanSDP
Age54.39.254.19.053.98.154.810.10.38
BMI (kg/m2)a26.55.527.96.027.45.925.04.2<0.001
n%n%n%n%
Ethnicity<0.001
 Non-Hispanic White39162.08435.613580.817175.4
 Black16025.412854.274.22511.0
 Hispanic6710.6229.32012.02511.0
 Other132.120.953.062.6
Education<0.001
 <High School213.3145.921.252.2
 High School and/or some college35255.815364.88148.511751.5
 ≥College grad25840.96929.28450.310546.3
Menopausal status0.49
 Pre21934.78033.95331.78637.9
 Post38160.414159.810663.513358.6
 Unknown314.9156.484.883.5
Smoking0.0002
 Never3094911147.09053.910747.1
 Former25039.68234.86237.110646.7
 Current7211.44318.2159.0146.2
Stageb0.74
In situ15326.35724.24426.45222.9
 Stage 124642.38536.06740.19341.0
 Stage II–IIIa18231.37431.44728.16126.9
ER statusc0.15
 Positive35024.112674.19780.812785.2
 Negative9578.64425.92319.22717.5
Treatment0.09
 surgery only19631.18736.94728.16227.3
 surgery + radiation23637.47431.46538.99642.3
 chemotherapy (any)19931.57531.85532.96930.4
Tamoxifen0.06
 No35956.914963.18651.512354.2
 Yes27243.18736.98148.510445.8
≥1 female relative with history of breast cancer0.35
 No33953.713958.98852.711249.3
 Yes24338.58033.96639.59642.3

P, between-group differences were tested using analysis of variance and χ2 tests as appropriate

Never smoker = smoked <100 cigarettes in lifetime.

Menopausal status at study enrollment was determined on the basis of age, date of last menstruation, hysterectomy, and oophorectomy status, and serum levels of estradiol, estrone, and follicle-stimulating hormone.

Female relatives included sisters, mother, daughters, grandmother, aunt, or nieces; 49 women responded ‘Don't know' regarding 1 or more female relative diagnosed with breast cancer.

Tamoxifen use included any use up until the 24-month follow-up.

  • anot measured in participants from LA county

  • bn = 50 missing

  • cn = 1,683, excluded due to: not done (n = 82), borderline (n = 1), unknown (n = 22), not in chart (n = 81)