Table 1

Distribution of demographic factors among pancreatic cancer cases and controls in the CPS II and PLCO cohorts

	CPS II cohort					PLCO cohort
	Cases (n=170)		Controls (n=170)			Cases (n=191)		Controls (n=201)
	No	Per cent	No	Per cent	p Value*	No	Per cent	No	Per cent	p Value*
Age (years)†	73.7	5.7	73.7	5.7	0.95	63.8	5.2	63.8	5.4	0.96
Sex
Male	90	52.9	90	52.9	1.00	116	60.7	122	60.7	1.00
Female	80	47.1	80	47.1		75	39.3	79	39.3
Race
White	163	95.9	162	95.3	1.00	175	91.6	183	91.0	0.98
Non-white	7	4.1	8	4.7		16	8.4	18	9.0
BMI (kg/m²)
<24.99	67	39.4	72	42.3	0.74	65	34.0	61	30.3	0.63
25–29.99	73	42.9	66	38.8		72	37.7	84	41.8
≥30	27	15.9	29	17.1		52	27.2	51	25.4
Missing	3	1.8	3	1.8		2	1.1	5	2.5
Smoking status
Never smoker	72	42.4	78	45.9	0.61	82	42.9	108	53.7	0.0033
Former smoker	90	52.9	87	51.2		80	41.9	82	40.8
Current smoker	8	4.7	5	2.9		29	15.2	11	5.5
Alcohol consumption
Never drink	40	23.5	32	18.8	0.039	42	22.0	53	26.3	0.63
<1 standard drink per day	62	36.5	85	50.0		91	47.6	90	44.8
≥1 standard drink per day	41	24.1	29	17.1		35	18.3	38	18.9
Missing	27	15.9	24	14.1		23	12.1	20	10.0
Diabetes
Yes	25	14.7	23	13.5	0.88	18	9.4	17	8.5	0.87
No	145	85.3	147	86.5		171	89.6	182	90.6
Missing						2	1.0	2	0.9

*p Values were based on t-test or χ² test (two-sided).
†Mean and SD instead of N and percentage were reported for age.
BMI, body mass index; CPS, Cancer Prevention Study; PLCO, prostate, lung, colorectal and ovarian cancer.