Table 2.

Distribution of ovarian cancer risk factors by race

	Total	White	Black	p
Number of cases	351	296	55
% Marital status				<.01
Currently married	56.7	61.8	29.1
Other	43.3	38.2	70.9
Mean years of education	13.5	13.6	12.7	<.05
Mean age at menarche	12.6	12.6	12.4	n.s.
% Parity				n.s.
Nulliparous	24.2	23.6	27.3
1 child	16.2	16.9	12.7
2 children	21.4	21.6	20.0
3 or more children	38.2	37.8	40.0
% Length of ovulatory period				n.s.
Low	33.0	32.1	38.2
Medium	33.9	35.1	27.3
High	33.0	32.8	34.5
% Familial cancer history	56.7	58.8	45.5	n.s.
% Oral contraceptive use	53.0	54.7	43.6	n.s.
% Hormone use, >=5yrs	8.0	8.5	5.5	n.s.
% Tubal ligation	12.9	11.2	21.8	< .05
% Hysterectomy	90.5	91.2	87.0	n.s.
% Smoking history				n.s.
Never	42.2	41.9	43.6
Former	37.3	37.2	38.2
Current	20.5	20.9	18.2
% Genital powder use	14.2	11.3	29.6	< .01
Mean recommended food score	7.95	7.98	7.76	n.s.
% poverty for case residential census tract	7.9	5.6	20.3	<.01
Mean patient volume of diagnosing hospital	21,220	21,141	21,640	n.s.
% Medicaid patients of diagnosing hospital	16.5	14.9	25.0	n.s.