Table 4.

Size of largest fibroid (in cm) by race and selected variables.

	African-American			White
	N	Mean (SD)	p-value	N	Mean (SD)	p-value^a
Age categories
30 – 34	12	4.8 (2.4)		8	5.0 (4.5)
35 – 39	53	5.0 (4.1)	0.9	24	3.6 (2.8)	0.3
40 – 44	98	6.0 (3.4)	0.3	57	3.5 (3.6)	0.2
45 – 47	43	4.9 (2.7)	0.9	32	3.9 (2.9)	0.4
BMI categories
<25	22	5.3 (3.7)		43	3.6 (3.0)
25 – <30	50	5.3 (3.8)	1.0	33	3.7 (3.6)	0.9
30 – <35	55	5.1 (3.1)	0.8	24	3.8 (3.5)	0.8
≥35	77	5.7 (3.2)	0.6	19	3.3 (2.8)	0.7
Time since fibroid diagnosis
<1 year	54	5.3 (4.0)		44	2.7 (2.2)
1-<5years	60	5.7 (3.4)	0.5	46	4.5 (3.7)	0.02
>=5 years	90	5.4 (3.1)	0.8	30	3.9 (3.8)	0.1
History of fibroids in mother or sister
Yes	130	5.2 (2.9)		40	3.9 (3.8)
No	59	5.6 (3.9)	0.5	67	3.5 (3.0)	0.6
Total pregnancies
None	23	8.7 (3.6)		18	6.7 (4.2)
1 – 2	71	5.7 (3.5)	<0.0001	52	3.6 (2.9)	0.001
≥3	112	4.6 (2.9)	<0.0001	51	2.9 (3.0)	0.0001
Time since last full-term pregnancy (among women with full-term pregnancies)
0–3 years	8	5.3 (5.6)		10	1.7 (2.1)
4–9 years	35	4.3 (3.3)	0.4	24	2.4 (2.5)	0.5
10+ years	126	5.1 (2.8)	0.9	59	3.5 (2.7)	0.15
Duration of OC use
Never	15	6.1 (3.5)		13	5.2 (4.7)
<1 year	18	5.3 (3.5)	0.5	20	4.6 (3.7)	0.6
1-< 5 years	59	5.6 (3.7)	0.6	29	3.0 (2.1)	0.04
5-<10 years	37	5.4 (2.8)	0.5	21	3.4 (2.8)	0.1
>= 10 years	75	5.3 (3.5)	0.4	35	3.3 (3.5)	0.06
Smoking status
Never	127	5.5 (3.3)		68	3.8 (3.3)
Former	30	5.0 (3.1)	0.5	30	4.2 (3.9)	0.5
Current	49	5.6 (4.0)	0.8	23	2.9 (2.3)	0.3
History of High blood pressure
Yes	86	5.3 (3.3)		23	3.4 (3.0)
No	119	5.5 (3.5)	0.7	98	3.8 (3.4)	0.6

p-values from student’s t-test or analysis of variance.