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.	7693	1467	85311	2475	33652	2687	20760	7550
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	1552	1751	1543	1643	1512	1727	1565	1589*
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 97039.

^*P > .05.