Table 1. Baseline characteristics of DES-exposed and unexposed women selected from the Sister Study.

Characteristics	Exposed (n = 100)%	Unexposed (n = 100%)	P d
40–49 yr	42	42
50–59 yr	58	58	1.00
Body Mass Index
<20	7	7
20–24.9	49	38
25–29.9	26	25
≥30	18	30	0.22
Age at Menarche
<12 yr	15	25
12–13 yr	51	49
≥14 yr	34	26	0.17
Age at Menopause a
<45 yr	11	8
45–55yr	29	31
≥55 yr	2	1	0.66
Menopause Status
Postmenopausal	45	45
Premenopausal	55	55	1.00
Oral Contraceptive Use
Ever	90	92
Never	10	8	0.62
HRT Use b
Current	8	13
Ever	15	12
Never	22	19	0.42
Parity
0	40	21
1	13	16
2	29	38
≥3	18	25	0.03
Smoking Status c
Current	8	4
Former	35	34
Never	54	58	0.60
Mothers Education at Age 13 c
<HS, HS/GED	55	60
Some College	12	10
Associate/Tech	12	9
Bach degree	16	17
Grad degree	4	2	0.82
Family Income During Childhood
Well Off	9	9
Middle Income	75	69
Low Income	13	17
Poor	3	5	0.73
Maternal Smoking c
Definitely	34	32
Probably	5	6
Probably not	4	2
Definitely not	56	59	0.83
Birth Weight c
<2500 g	13	6
2500-<4000g	70	71
4000+ g	7	9	0.25
Gestational Age c
Not Early, 2+Weeks	67	68
Early, 2–4 Weeks	10	5
Early, 1+ months	6	4	0.40

^aAge at menopause was ascertained among the 45 exposed and 45 unexposed women who were postmenopausal

^bHRT was ascertained among postmenopausal women only

^cColumn % does not add to 100% due to missing data

^dBased on Chi-Square test