American Association for Cancer Research

Table 1.

Baseline characteristics of the study population

	Noncases 25%-median-75% or % (n = 2,169)	Cancer cases 25%-median-75% or % (n = 296)	P*
Follow-up time (mean years)	5.92	2.85
Age	71-73-76	71-74-76	0.09
Gender (females; %)	55	38	<0.001
Race (Caucasian; %)^†	55	51	0.16
Site (Memphis; %)^†	50	48	0.49
Education (%)
Less than high school	27	25	0.30
High school	33	31
Postsecondary	40	44
Smoking status (%)
Never	46	33	<0.001
Former	44	52
Current	10	16
Pack-years (continuous)	0-2-27	0-15-43
Comorbid conditions (%)
Cardiovascular disease	23	23	0.98
Diabetes	16	16	0.91
Chronic obstructive pulmonary disease and other pulmonary diseases	12	12	0.73
BMI	24.1-27.0-30.2	24.2-27.1-30.7^‡	0.71
Abdominal visceral fat area (cm²)	93-129-178	99-138-183^†	0.08
Physical activity, kcal/wk (%)
0-499.9	37	40	0.15
500-999.9	34	35
≥1,000	29	25
Medication use (%)
NSAIDs	23	18	0.04
Corticosteroids	4	3	0.38
ACE inhibitors	15	17	0.43
Statins	12	14	0.34

	Noncases 25%-median-75% or % (n = 2,169)	Cancer cases 25%-median-75% or % (n = 296)	P*
Follow-up time (mean years)	5.92	2.85
Age	71-73-76	71-74-76	0.09
Gender (females; %)	55	38	<0.001
Race (Caucasian; %)^†	55	51	0.16
Site (Memphis; %)^†	50	48	0.49
Education (%)
Less than high school	27	25	0.30
High school	33	31
Postsecondary	40	44
Smoking status (%)
Never	46	33	<0.001
Former	44	52
Current	10	16
Pack-years (continuous)	0-2-27	0-15-43
Comorbid conditions (%)
Cardiovascular disease	23	23	0.98
Diabetes	16	16	0.91
Chronic obstructive pulmonary disease and other pulmonary diseases	12	12	0.73
BMI	24.1-27.0-30.2	24.2-27.1-30.7^‡	0.71
Abdominal visceral fat area (cm²)	93-129-178	99-138-183^†	0.08
Physical activity, kcal/wk (%)
0-499.9	37	40	0.15
500-999.9	34	35
≥1,000	29	25
Medication use (%)
NSAIDs	23	18	0.04
Corticosteroids	4	3	0.38
ACE inhibitors	15	17	0.43
Statins	12	14	0.34

For continuous variables: P for Wilcoxon rank test (two-group comparison). For categorical variables: P for χ² test.

Other categories are as follows: race, African American; site, Pittsburgh.

Only 185 cases ascertained 2 years after baseline examination (see Materials and Methods).