Table 4.

Hazard ratios for PA in association with breast cancer-specific mortality among Black breast cancer survivors^a in the Southern Community Cohort Study

		Age-adjustedb		Further-adjusted model 1c		Further-adjusted model 2d
	Event	HR	(95% CI)	HR	(95% CI)	HR	(95% CI)
Total PA (MET-hours/day)
<9.91	55	1.00	(reference)	1.00	(reference)	1.00	(reference)
9.91–<17.2	43	0.74	(0.50–1.11)	0.83	(0.55–1.25)	0.86	(0.57–1.31)
17.2–27.29	40	0.65	(0.43–0.97)	0.66	(0.43–1.01)	0.65	(0.42–1.00)
≥27.29	35	0.52	(0.34–0.79)	0.59	(0.38–0.91)	0.62	(0.39–0.98)
ptrend		<0.01		<0.01		0.02
Total PA (hours/day)
<3.14	56	1.00	(reference)	1.00	(reference)	1.00	(reference)
3.14–<5.43	41	0.77	(0.51–1.15)	0.82	(0.54–1.23)	0.94	(0.62–1.44)
5.43<8.71	39	0.62	(0.41–0.93)	0.63	(0.41–0.96)	0.68	(0.44–1.05)
≥8.71	37	0.57	(0.37–0.86)	0.62	(0.41–0.96)	0.69	(0.44–1.08)
ptrend		<0.01		0.01		0.04

Abbreviations: physical activity (PA), hazard ratios, metabolic equivalents (MET).

^aIncludes women diagnosed with incident breast cancer after enrollment in the cohort.

^bAdjusted for age at diagnosis.

^cAdditionally adjusted for education, time between cohort enrollment and breast cancer diagnosis, diabetes, and body mass index.

^dAdditionally adjusted for stage, breast cancer surgery, radiotherapy, and chemotherapy