American Association for Cancer Research

Table 2

Selected characteristics of participants with and without ovarian cancer

	Cases (n = 254)			Controls (n = 652)		P
		No.	(%)	No.	(%)	P
Age at interview (years): mean (SD)	47.5 (12.6)		48.0 (10.2)
≤34^a	42	16.5	63	9.7
35–49	100	39.4	285	43.7
50–64	86	33.9	265	40.6
≥65	26	10.3	39	6.0
Area of resident
Urban^a	148	58.3	354	54.3
Rural	106	41.7	298	45.7
Income in 1998 (year/month)					< 0.01
≤1000^a	193	76.0	571	87.6
1001–2000	50	19.7	69	10.6
≥2001	11	4.3	12	1.8
Education
None^a	44	17.3	133	20.4
Primary	73	28.7	216	33.1
Secondary	95	37.5	230	35.3
Tertiary	42	16.5	73	11.2
BMI (5 years ago, kg/m²)
≤18.5^a	16	6.3	58	8.9
18.5–24.5	190	74.8	496	76.1
≥25	48	18.9	98	15.0
Vigorous activity					<0.01
Never (0 h/week)^a	202	79.5	456	69.9
Ever (>1 h/week)	52	20.5	196	30.1
Overall tea consumption					<0.01
Never^a	113	44.5	166	25.5
Ever	141	55.5	486	74.5
Alcohol consumption^b
Never^a	197	77.6	452	69.5
Ever	57	22.4	198	30.5
Coffee consumption^b
Never^a	247	97.2	629	96.8
Ever	7	2.8	21	3.2
Tobacco smoking
Never^a	249	98.0	634	97.2
Ever	5	2.0	18	2.8
Marital status					<0.01
Never married^a	7	2.8	8	1.2
Married	231	90.9	610	93.6
Widowed, divorced, separated	16	6.3	34	5.2
Menopause status^b
No^a	150	59.1	394	60.6
Yes	104	40.9	256	39.4
No. of delivery of full-term pregnancy^b					< 0.05
0^a	35	13.8	42	6.5
1	86	33.9	220	33.8
2	77	30.3	233	35.8
≥3	56	22.0	155	23.8
Oral contraceptive use^b					<0.01
Never^a	198	78.0	416	64.0
Ever	56	22.0	234	36.0
Tubal ligation^b
No^a	184	72.4	447	68.8
Yes	70	27.6	203	31.2
Ovarian cancer in first degree relatives^b					<0.01
No^a	248	97.6	649	99.8
Yes	6	2.4	1	0.2

	Cases (n = 254)			Controls (n = 652)		P
		No.	(%)	No.	(%)	P
Age at interview (years): mean (SD)	47.5 (12.6)		48.0 (10.2)
≤34^a	42	16.5	63	9.7
35–49	100	39.4	285	43.7
50–64	86	33.9	265	40.6
≥65	26	10.3	39	6.0
Area of resident
Urban^a	148	58.3	354	54.3
Rural	106	41.7	298	45.7
Income in 1998 (year/month)					< 0.01
≤1000^a	193	76.0	571	87.6
1001–2000	50	19.7	69	10.6
≥2001	11	4.3	12	1.8
Education
None^a	44	17.3	133	20.4
Primary	73	28.7	216	33.1
Secondary	95	37.5	230	35.3
Tertiary	42	16.5	73	11.2
BMI (5 years ago, kg/m²)
≤18.5^a	16	6.3	58	8.9
18.5–24.5	190	74.8	496	76.1
≥25	48	18.9	98	15.0
Vigorous activity					<0.01
Never (0 h/week)^a	202	79.5	456	69.9
Ever (>1 h/week)	52	20.5	196	30.1
Overall tea consumption					<0.01
Never^a	113	44.5	166	25.5
Ever	141	55.5	486	74.5
Alcohol consumption^b
Never^a	197	77.6	452	69.5
Ever	57	22.4	198	30.5
Coffee consumption^b
Never^a	247	97.2	629	96.8
Ever	7	2.8	21	3.2
Tobacco smoking
Never^a	249	98.0	634	97.2
Ever	5	2.0	18	2.8
Marital status					<0.01
Never married^a	7	2.8	8	1.2
Married	231	90.9	610	93.6
Widowed, divorced, separated	16	6.3	34	5.2
Menopause status^b
No^a	150	59.1	394	60.6
Yes	104	40.9	256	39.4
No. of delivery of full-term pregnancy^b					< 0.05
0^a	35	13.8	42	6.5
1	86	33.9	220	33.8
2	77	30.3	233	35.8
≥3	56	22.0	155	23.8
Oral contraceptive use^b					<0.01
Never^a	198	78.0	416	64.0
Ever	56	22.0	234	36.0
Tubal ligation^b
No^a	184	72.4	447	68.8
Yes	70	27.6	203	31.2
Ovarian cancer in first degree relatives^b					<0.01
No^a	248	97.6	649	99.8
Yes	6	2.4	1	0.2

Reference category.

Data missing for two controls.