Table 1.

Demographics and characteristics of subjects classified as case and control.

CasesControls
N2724
Male/Female22 (81%)/5 (19%)14 (58%)/10 (42%)
Age (mean)58.1 years48.6 years
Tumor site
Oral cavity6 (22%)N/A
Oropharynx12 (44%)N/A
Larynx6 (22%)N/A
Hypopharynx2 (7%)N/A
N/A1 (4%)N/A
AJCCstage
Stage I3N/A
Stage II5N/A
Stage III4N/A
Stage IV15N/A
Alcohol use
Never78
Monthly24
2-4×/month35
>4×/month137
N/A20
Cigarettes per day (mean)13.913.8
Smoking duration years (mean)22.323.6
Mean total urinary cotinine (ng/mL)1,609.81,817.4