Table 4.

One Year Incidence of Simple Ovarian Cysts and Multivariable Modeling Results

		Incident Simple Cysts		Adjusted Association*
		Count	Rate (%)	Odds Ratio	95% CI
Overall		459	8.3
Age
	55–59	179	8.7	ref.
	60–64	141	7.9	0.98	(0.76, 1.27)
	65–69	102	9.4	1.26	(0.93, 1.78)
	70–74	37	6.6	0.91	(0.60, 1.39)
Education
	<12 years	21	7.5	0.99	(0.60, 1.64)
	12 yrs/Completed High School	167	7.4	ref.
	Some College	116	10.0	1.36	(1.03, 1.79)
	College Graduate	75	8.4	1.29	(0.94, 1.78)
	Post Graduate	77	8.8	1.35	(0.98, 1.88)
	Missing	3	11.1	NA
Cigarette Use
	Never Smoked	230	7.4	ref.
	Current Smoker	49	9.7	1.26	(0.88, 1.79)
	Former Smoker	177	9.5	1.25	(1.00, 1.56)
	Missing	3	11.5	NA
First Degree Family History of Breast Cancer
	No	352	7.9	ref.
	Yes	75	9.6	1.18	(0.89, 1.55)
	Unknown	22	12.2	NA
	Missing	10	11.2	NA
Ever Used Oral Contraceptives
	No	198	7.8	ref.
	Yes	258	8.8	1.07	(0.85, 1.34)
	Missing	3	10.3	NA
Age at First Pregnancy
	Never pregnant	42	10.1	1.27	(0.86, 1.88)
	less than 20	97	8.4	1.01	(0.77, 1.33)
	20–24	220	8.8	ref.
	25–29	71	6.7	0.85	(0.62, 1.15)
	30+	25	7.6	1.03	(0.65, 1.64)
	Missing	4	10.5	NA
Age at Menopause
	<40	56	14.1	1.92	(1.32, 2.80)
	40–44	46	9.2	1.35	(0.94, 1.95)
	45–49	109	8.6	1.27	(0.97, 1.66)
	50–54	168	6.7	ref.
	55+	68	9.1	1.43	(1.05, 1.95)
	Missing	12	15.8	NA
Previous Gynecologic Surgery
	No	255	7.2	ref.
	Yes	201	10.6	1.52	(1.21, 1.92)
	Don't Know	0	0.0	NA
	Missing	3	8.3	NA
History of Benign Ovarian Tumors or Cysts
	No	414	8.2	ref.
	Yes	39	10.2	1.25	(0.86, 1.82)
	Missing	6	6.0	NA

^*Model adjusts for all factors shown, plus race and screening center

ref. - Referent Category

NA - Not Available