Table 1.

Age-adjusted distribution of potential risk factors for uterine leiomyoma according to lycopene quntiles at baseline, NHSII 1991 – 2001

	Quintiles of lycopene
Characteristic	Q1 (low)	Q2	Q3	Q4	Q5 (high)
Median lycopene intake	3027	4737	6095	8230	13687
n	16466	16595	16513	16492	16446
Mean age (years)	35.7	35.7	35.7	35.7	35.7
Age at menarche (%)
≤ 10 years	7	7	7	8	8
11 years	16	17	16	17	16
12 years	30	30	31	30	30
13 years	27	28	28	28	28
14–15	15	15	15	14	15
≥ 16	3	3	3	3	3
Missing	<1	<1	<1	<1	<1
Ever used oral contraceptives (%)	82	84	85	84	84
Age at first oral contraceptive use (%)
<13 years	18	16	15	16	16
13–16 years	5	5	5	5	5
17–20 years	38	40	40	40	40
21–24 years	27	28	28	28	27
≥ 25 years	10	9	9	9	9
Missing	3	2	2	2	3
Infertile (%)	6	6	6	6	6
Ever married (%)	86	90	91	91	91
Parity
0	32	26	26	26	27
1	19	18	18	17	16
2	30	35	35	35	34
3	14	16	16	16	16
≥4	4	5	5	5	5
Missing	2	2	2	2	2
Age at first birth (% among parous women)
<24 years	36	35	36	37	38
25–30 years	50	52	52	51	50
>30 years	15	13	12	12	12
Time since last birth (% among parous women)
<1 year	7	6	6	6	6
1–3 years	31	30	28	28	29
4–5 years	14	15	16	15	15
6–7 years	11	12	12	12	12
8–9 years	9	10	10	10	10
10–12 years	11	12	13	12	13
13–15 years	8	8	8	8	8
>16 years	9	8	7	8	8
Ancestry (%)
White	89	93	93	94	94
Black	3	1	1	1	1
Hispanic	1	1	1	1	2
Asian	3	2	1	1	1
Other	4	3	3	3	3
Smoking (%)
Never	68	67	66	65	65
Past	19	21	21	21	23
Current	13	12	12	13	12
Missing	< 1	< 1	< 1	< 1	< 1
Body Mass Index
<20	14	13	13	12	13
20–21.9	24	24	25	24	24
22–23.9	18	20	20	20	20
24–24.9	8	8	8	8	8
25–26.9	10	10	10	11	10
27–29.9	9	9	9	9	9
>30	14	12	12	13	12
Missing	3	3	3	3	3
Diastolic Blood Pressure
<65	22	22	22	22	23
65–74	47	48	48	48	47
75–84	24	24	23	23	23
85–89	4	4	4	4	4
≥90	3	2	2	2	2
Missing	<1	<1	<1	<1	<1
Antihypertension medication (%)	3	3	3	3	3