Table 1.

Age and age-standardized baseline characteristics according to perineal talc use in 1982 among 66,088 women in the Nurses’ Health Study

	Ever perineal talc use
Characteristics	No (n= 40,958)	Yes (n=25,130)
Age	48	48
Age at menarche	12.6	12.5
Nulliparous (%)	6.0	5.6
Parity† (mean)	3.2	3.2
Age at first birth†	25	25
Age at last birth†	31	31
Ever OC use (%)	47	46
OC duration (months)‡	52	51
Postmenopausal (%)	40	40
Age at menopause*	49	49
Ever PMH use* (%)	30	29
PMH duration (months)‡*	35	34
Ever cigarette smoking (%)	57	56
Pack-years‡	22	21
BMI (kg/m2)	24.2	25.6
BMI (kg/m2) (%)
<25	67.9	55.8
25-29	22.6	27.2
≥30	9.5	17.0
Diabetes (%)	0.8	0.9
Family history uterine cancer (%)	3.0	2.9
IUD (%)	2.9	2.8
Diaphragm (%)	4.2	4.4

Characteristics adjusted for age in 5-year categories (<45, 45-49, 50-54, 55-59, 60-64, >65)

^*Among postmenopausal women

^†Among parous women only

^‡Among users