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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 (cm293-129-178 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 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 (cm293-129-178 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 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).

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