TABLE 1.

Age-Adjusted Characteristics of Postmenopausal Women by Lowest and Highest Categories of Occupational and Household Activity, Transportation Activity, and Sedentary Behavior: National Institutes of Health–AARP Diet and Health Study, 1996–2003

	Routine Activity During Day at Work or at Home		Years Spent Walking or Biking to Work		Television or Video Watching		Sitting
	Sitting all Day	Heavy Lifting or Carrying	< 1 Year	≥ 10 Years	< 3 H/Day	≥ 9 Hours/Day	< 3 Hours/Day	≥ 9 Hours/Day
No.	7 693	1 467	85 311	2 475	33 652	2 687	20 760	7 550
Age, y	63	63	63	63	63	63	63	63
Body mass index, kg/m2	29	26	27	26*	25	29	26	28
Energy intake, kcal/day	1 552	1 751	1 543	1 643	1 512	1 727	1 565	1 589*
Alcohol intake, g/day	6	7	6	6	6	6*	6	6
Under 1 h of recreational moderate–vigorous physical activity/wk, %	48	11	25	20	21	38	18	42
Ever smoker, %	61	53	54	50	50	64	50	61
College graduate, %	32	21	33	34	46	16	32	34
White, %	94	93	93	91	95	86	91	95
Family history of breast cancer, %	13	14*	13	14*	14	13	13	13*
Nulliparous, %	16	14	14	24	14	14	12	18
Ever had a breast biopsy, %	24	23	24	21	24	24*	24	23*
Current menopausal hormone therapy use, %	43	38*	47	37	51	36	46	44

Note. Age-adjusted means are used for continuous variables and age-adjusted percentages for categorical variables; all are significant at P < .05 unless otherwise specified. The total number of participants was 97 039.

^*P > .05.