Table 2. Mean Percentage of European Ancestry^a among African American Women with Uterine Fibroids (Cases) and Controls.

	Cases		Controls		Unadjusted mean difference (β)	Age-adjusted mean difference (β)	Age-adjusted 95% CI of (β)	P-value
	No.	mean %	No.	mean %
All cases and controls	393	20.7	132	21.3	-1.16	-1.27	(-4.02, 1.48)	0.362
Case with age < 40, all controls	126	20.5	132	21.3	-1.72	-1.46	(-5.22, 2.31)	0.449
Case with age ≥ 40, all controls	267	20.8	132	21.3	-0.86	-0.74	(-4.00, 2.52)	0.657
Cases and controls, parity = 0	206	21.0	60	20.6	0.81	0.44	(-3.64, 4.52)	0.832
Cases and controls, parity ≥ 1	197	20.4	72	22.0	-2.95	-2.84	(-6.61, 0.93)	0.140
Cases and controls, BMI ≤ 25	88	21.2	44	21.0	0.50	0.47	(-4.74, 5.67)	0.861
Cases and controls, BMI > 25 and BMI ≤ 30	125	21.3	38	21.7	-0.60	-1.25	(-6.07, 3.57)	0.611
Cases and controls, BMI > 30 and BMI ≤ 35	80	20.4	26	21.5	-2.22	-2.33	(-8.67, 4.00)	0.470
Cases and controls, BMI > 35	100	19.7	24	21.3	-3.31	-2.90	(-9.32, 3.52)	0.376
Cases controls, low physical activity	143	20.6	46	20.1	1.14	1.92	(-3.04, 6.88)	0.448
Cases controls, moderate physical activity	133	21.1	31	21.8	-1.25	-1.99	(-7.13, 3.17)	0.450
Cases controls, high physical activity	115	20.6	54	21.8	-2.32	-3.17	(-7.83, 1.49)	0.182

^aEstimated using the program ADMIXMAP