Table 1.

Baseline Demographics and Clinical Characteristics of Participants in the ALPHA Trial, Alberta, Canada, 2003-2007

Characteristic	Exercisers (n = 160)	Controls (n = 160)
Age, years
Mean	61.2	60.6
SD	5.4	5.7
Body mass index, kg/m2
Mean	29.1	29.2
SD	4.5	4.3
Alcohol intake, g/d
Mean	4.4	5.0
SD	5.9	7.6
Total energy intake, kcal/d
Mean	1,551.2	1,527.3
SD	598.7	535.0
Maximal oxygen consumption, mL/kg/min
Mean	27.1	26.8
SD	6.2	6.0
Past year total physical activity, MET-h/wk
Total physical activity
Mean	114.2	129.1
SD	57.6	77.9
Occupational activity
Mean	50.4	52.2
SD	49.1	57.9
Household activity
Mean	52.9	63.9
SD	34.3	53.5
Recreation activity
Mean	10.2	12.1
SD	11.8	13.6
Full-time employment
No. of patients	82	79
%	55	51
Education > high school
No. of patients	112	102
%	70	64
Married/common law
No. of patients	113	125
%	71	78
White race
No. of patients	144	145
%	91	91
First-degree family history of breast cancer
No. of patients	31	35
%	19	22
Ever used hormone therapy
No. of patients	75	71
%	47	44
Sex hormone–binding globulin, nmol/L
Median	41.5	39.5
Quartile 1-3	30.0-57.0	28.0-51.5
Estrone, pg/mL
Median	32.0	32.0
Quartile 1-3	24.0-44.0	22.5-44.5
Estradiol, pg/mL
Median	9.0	10.0
Quartile 1-3	7.0-12.0	7.0-14.0
Free estradiol, pg/mL
Median	0.23	0.24
Quartile 1-3	0.17-0.31	0.18-0.36
Androstenedione, pg/mL
Median	576	547
Quartile 1-3	434-779	417-736
Testosterone, ng/dL
Median	24.3	23.3
Quartile 1-3	16.8-32.8	17.5-32.4
Free testosterone, ng/dL
Median	0.36	0.36
Quartile 1-3	0.24-0.48	0.25-0.49

Abbreviations: ALPHA, Alberta Physical Activity and Breast Cancer Prevention Trial; SD, standard deviation; MET, metabolic equivalent.