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Table 1

Characteristics of OSCCa cases and controls

CharacteristicCase % (N = 407)Control % (N = 615)OR (95% CI)
Age at reference date (yrs)    
 18–39 6.9 10.1  
 40–49 20.4 23.2  
 50–59 37.6 35.0  
 60–65 35.1 31.7  
Sex    
 Male 70.8 71.5  
 Female 29.2 28.5  
Birth year    
 1919–1929 30.0 26.8  
 1930–1934 21.4 20.3  
 1935–1939 17.0 16.4  
 1940–1944 15.2 14.5  
 1945–1949 7.4 9.4  
 1950–1959 7.4 9.3  
 1960–1971 1.7 3.2  
Raceb    
 White 93.9 94.1 1.0 
 Black 3.7 2.8 1.2 (0.6–3.2) 
 Other 2.5 3.1 1.6 (0.5–2.6) 
Incomeb,c    
 <$15,000 23.2 5.8 1.0 
 $15,000 to $29,999 26.2 20.8 0.4 (0.2–0.7) 
 $30,000 to $44,999 24.7 25.6 0.3 (0.2–0.5) 
 ≥$45,000 25.9 47.8 0.2 (0.1–0.4) 
Educationb    
 High school or less 44.7 29.0 1.0 
 Technical school 7.9 5.9 1.1 (0.6–1.9) 
 College 37.8 49.1 0.7 (0.5–1.0) 
 Graduate school 9.6 16.0 0.7 (0.5–1.2) 
Cigarette smoking (pack-years)d    
 <1 14.6 38.3 1.0 
 1–9 6.4 15.7 1.0 (0.6–1.8) 
 10–19 7.6 11.7 1.6 (0.9–2.7) 
 20–29 10.9 12.2 2.0 (1.2–3.3) 
 ≥30 60.5 22.0 6.1 (4.1–9.3) 
Alcohol consumption (drinks/week)e    
 <1 13.5 26.7 1.0 
 1–7 26.8 43.1 1.1 (0.7–1.6) 
 8–14 15.5 14.5 1.6 (1.0–2.7) 
 15–28 17.2 9.8 2.2 (1.2–3.8) 
 ≥29 27.0 6.0 4.4 (2.0–9.6) 
CharacteristicCase % (N = 407)Control % (N = 615)OR (95% CI)
Age at reference date (yrs)    
 18–39 6.9 10.1  
 40–49 20.4 23.2  
 50–59 37.6 35.0  
 60–65 35.1 31.7  
Sex    
 Male 70.8 71.5  
 Female 29.2 28.5  
Birth year    
 1919–1929 30.0 26.8  
 1930–1934 21.4 20.3  
 1935–1939 17.0 16.4  
 1940–1944 15.2 14.5  
 1945–1949 7.4 9.4  
 1950–1959 7.4 9.3  
 1960–1971 1.7 3.2  
Raceb    
 White 93.9 94.1 1.0 
 Black 3.7 2.8 1.2 (0.6–3.2) 
 Other 2.5 3.1 1.6 (0.5–2.6) 
Incomeb,c    
 <$15,000 23.2 5.8 1.0 
 $15,000 to $29,999 26.2 20.8 0.4 (0.2–0.7) 
 $30,000 to $44,999 24.7 25.6 0.3 (0.2–0.5) 
 ≥$45,000 25.9 47.8 0.2 (0.1–0.4) 
Educationb    
 High school or less 44.7 29.0 1.0 
 Technical school 7.9 5.9 1.1 (0.6–1.9) 
 College 37.8 49.1 0.7 (0.5–1.0) 
 Graduate school 9.6 16.0 0.7 (0.5–1.2) 
Cigarette smoking (pack-years)d    
 <1 14.6 38.3 1.0 
 1–9 6.4 15.7 1.0 (0.6–1.8) 
 10–19 7.6 11.7 1.6 (0.9–2.7) 
 20–29 10.9 12.2 2.0 (1.2–3.3) 
 ≥30 60.5 22.0 6.1 (4.1–9.3) 
Alcohol consumption (drinks/week)e    
 <1 13.5 26.7 1.0 
 1–7 26.8 43.1 1.1 (0.7–1.6) 
 8–14 15.5 14.5 1.6 (1.0–2.7) 
 15–28 17.2 9.8 2.2 (1.2–3.8) 
 ≥29 27.0 6.0 4.4 (2.0–9.6) 
a

OSCC, oral squamous cell carcinoma; OR, odds ratio; CI, confidence interval.

b

ORs and 95% CIs adjusted for sex, birth year (continuous), cigarette smoking (continuous pack-years), alcohol consumption (continuous average drinks/week), and study (first or second). Excludes two cases and two controls with missing data on pack-years of cigarette smoking.

c

Excludes 9 cases and 11 controls with missing data on income.

d

ORs and 95% CIs adjusted for sex, birth year (continuous), alcohol consumption (continuous average drinks/week), and study (first or second). Excludes two cases and two controls with missing data on pack-years of cigarette smoking.

e

ORs and 95% CIs adjusted for sex, birth year (continuous), cigarette smoking (continuous pack-years), and study (first or second). Excludes two cases and two controls with missing data on pack-years cigarette smoking.

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