Table 1.

Distribution of Study Subjects by MHT Use and Selected Factors, NIH-AARP Diet and Percent of Study Subjects by Hormone Use Categories

	None	ET-Only	EPT	Other/Unknown
Study subjects	45,443	33,798	33,339	5,428
Age at study entry
<57	14.6	18.7	23.8	19.4
57–60	17.1	19.9	26.1	21.4
61–64	24.4	24.3	24.0	24.0
65–68	31.7	26.8	20.0	26.1
≥69	12.3	10.2	6.1	9.2
Race, %
Caucasian	89.4	91.8	93.7	88.7
Black	6.3	4.5	2.4	6.6
Other/unknown	4.3	3.8	3.9	4.7
Married, %	38.5	46.9	49.7	45.5
College graduate, %	26.8	27.8	41.7	28.0
Cigarette smoking, status and number of cigarettes/day, %
Never	46.5	46.0	44.4	45.9
Former, ≤20	25.9	28.0	30.0	27.9
Former, >20	11.6	12.7	14.4	12.9
Current, ≤20	11.8	9.6	7.9	9.8
Current, >20	4.2	3.9	3.3	3.5
Menopausal type and age at menopause at baseline, years
Natural Menopause, <45	9.7	3.0	6.7	5.6
Natural Menopause, 45–49	21.9	5.8	19.1	12.1
Natural Menopause 50–54	38.3	8.4	38.0	20.1
Natural Menopause, ≥55	7.7	1.6	9.8	5.3
Bilaterial oophorectomy, <40	2.6	14.1	3.0	9.1
Bilaterial oophorectomy, 40–44	1.9	11.0	2.8	6.7
Bilaterial oophorectomy, 45–49	1.8	11.7	3.4	6.8
Bilaterial oophorectomy, ≥50	1.1	6.5	3.0	5.0
Hysterectomy/intact ovaries, <40	5.0	14.8	2.9	9.9
Hysterectomy/intact ovaries, 40–44	3.0	8.1	1.5	5.8
Hysterectomy/intact ovaries, 45–49	1.8	4.9	1.1	3.4
Hysterectomy/intact ovaries, ≥50	0.8	1.7	0.7	1.4
Other/unknown	2.9	7.4	1.8	5.9
Surgical other, unknown	1.5	1.1	6.1	2.9
BMI at baseline
<25	38.7	43.5	52.3	43.0
25–29	31.8	32.9	29.8	32.4
≥30	25.4	20.7	15.4	20.9
Self-reported health status at baseline
Excellent	17.0	14.9	21.7	15.2
Very Good	34.8	34.7	38.4	34.3
Good	34.5	36.5	30.4	34.7
Fair/Poor	12.6	12.9	8.7	14.7

Column percentages; totals do not add to 100% due to missing values.