Table 3.

Adjusted¹ physical activity levels (hrs/week) before and after a diagnosis of breast cancer by adjuvant treatment (N = 812).

	Surgery	Surgery+Radiation	Surgery+Chemotherapy	Surgery+Rad + Chemo
	Mean ± SE (n = 266)	Mean ± SE (n = 329)	Mean ± SE (n = 52)	Mean ± SE (n = 165)
Total PA2
Before Diagnosis	18.9 ± 0.2	18.7 ± 0.2	19.7 ± 0.4	18.9 ± 0.3
After Diagnosis	17.3 ± 0.6	17.4 ± 0.5	16.1 ± 1.4	15.3 ± 0.9
Absolute Difference	−1.6 ± 0.6 c	−1.3 ± 0.5	−3.6 ± 1.4bc	−3.5 ± 0.9 bc
% Difference	−8.5%	−7.0%	−18.3%b	−18.5%b
Light-Intensity PA3
Before Diagnosis	11.7 ± 0.4	11.5 ± 0.3	12.1 ± 0.8	11.2 ± 0.5
After Diagnosis	11.1 ± 0.5	10.9 ± 0.4	10.2 ± 1.1	9.8 ± 0.7
Absolute Difference	−0.7 ± 0.5	−0.5 ± 0.4	−1.8 ± 1.1c	−1.4 ± 0.7
% Difference	−6.0%	−4.3%	−14.9%	−12.5%
Moderate-Intensity PA4
Before Diagnosis	6.6 ± 0.3	6.5 ± 0.3	7.1 ± 0.7	7.1 ± 0.4
After Diagnosis	5.8 ± 0.4	6.0 ± 0.3	6.1 ± 0.9	4.9 ± 0.6
Absolute Difference	−0.8± 0.4c	−0.5 ± 0.4	−1.1 ± 0.9	−2.2 ± 0.6abc
% Difference	−12.1%	−7.7%	−15.5%	−31.0%ab
Vigorous-Intensity PA5
Before Diagnosis	0.6 ± 0.1	0.7 ± 0.1	0.5 ± 0.2	0.5 ± 0.1
After Diagnosis	0.3 ± 0.1	0.5 ± 0.1	0.1 ± 0.2	0.3 ± 0.1
Absolute Difference	−0.2 ± 0.1c	−0.3 ± 0.1c	−0.3 ± 0.2c	−0.3 ± 0.1c
% Difference	−33.3%	−42.9%	−60.0%	−60.0%

	Surgery	Surgery+Radiation	Surgery+Chemo	S+Rad + Chemo
	Mean ± SE (n = 266)	Mean ± SE (n = 329)	Mean ± SE (n = 52)	Mean ± SE (n = 165)
Sports/Recreational PA
Before Diagnosis	2.9 ± 0.7	3.0 ±0.2	2.9 ± 0.5	3.0 ± 0.4
After Diagnosis	2.2 ± 0.1	2.2 ± 0.1	1.8 ± 0.3	1.4 ± 0.2a b
Absolute Difference	−0.7 ± 0.1c	−0.7 ± 0.1c	−1.0 ± 0.3c	−1.5 ± 0.2abc
% Difference	−24.1%	−23.3%	−34.5%	−50.0%ab
Household PA
Before Diagnosis	14.1 ± 0.8	14.5 ± 0.8	14.5 ± 1.7	14.5 ± 1.4
After Diagnosis	13.7 ± 0.6	13.9 ± 0.5	13.1 ± 1.4	12.7 ± 0.8
Absolute Difference	−0.8 ± 0.6	−0.6 ± 0.5	−1.4 ± 1.3c	−1.8 ± 0.8c
% Difference	−5.7%	−4.1%	−9.7%	−12.4%
Sedentary6
Before Diagnosis	41.3 ± 1.3	39.7 ± 1.1	43.4 ± 2.9	37.8 ± 1.8
After Diagnosis	44.1 ± 1.3	41.0 ± 1.1	49.4 ± 2.9b	45.9 ± 1.8b
Absolute Difference	2.8 ± 1.0c	1.3 ± 0.8c	6.0 ± 2.2c	8.0 ± 1.4abc
% Difference	6.8%	3.3%	13.8%	21.2%ab

¹Least square means adjusted for age, menopausal status, education, race, ethnicity, study site, disease stage, season, time from diagnosis to interview, before diagnosis physical activity level, tamoxifen therapy, family history of breast cancer, full-time employment, smoking status, marital status, self-reported physician-diagnosed type 2 diabetes, and overall health.

²Total physical activity is the sum of light, moderate, and vigorous intensity physical activity. Total physical activity is also the sum of sports and household activity.

³Light intensity: < 3 METs

⁴Moderate intensity: 3 – 6 METs

⁵Vigorous intensity: > 6 METs

⁶Sedentary activity includes watching television, reading, and sitting.

^asignificantly different from surgery (p < .05).

^bsignificantly different from surgery+radiation (p < .05).

^csignificantly different from before diagnosis PA levels (p < .05).