Table 1

The distribution of marijuana use (number and percentage of users and nonusers) in cases and controls, by category of selected demographic factors, smoking, alcohol, and mutagen sensitivity

ControlsCases
UsersNonusersTotal%UsersNonusersTotal%
Total171591769.72414917313.9
Age
 <404151921.152771.4
 40–548364418.215334831.3
 ≥5551081134.441141183.4
Gender
 Male111001119.9179210915.6
 Female659659.27576410.9
Race
 White1614315910.12213115314.4
 Non-White116175.92182010.0
Education
 ≤High school442468.7119410510.5
 College10809011.18394717.2
 >College336397.74141822.2
Cigarette smoking
 Never556618.2226287.1
 Quit9627112.78344219.1
 Currenta237395.114849814.3
Pack-Years
 0556618.2226287.1
 1–22.46455111.89132240.9
 22.5–44.93252810.7437419.8
 ≥45118195.3662688.8
Cigarettes/day
 0556618.2226287.1
 1–20765729.711586915.9
 21+4293312.111586915.9
Years of smoking
 0556618.2226287.1
 1–207394615.29112045.0
 21–40237395.19606913.0
 >40113147.1142432.3
Age at start smoking (ever smokers only)
 >19126273.7135362.8
 18–19224267.75242917.2
 16–174212516.08293721.6
 <164283212.58303821.1
Years since quitting smoking (ex-smokers only)
 >195273215.64121625.0
 5–194353910.34222615.4
 <50880.012566817.7
Passive smoking
 Never4232714.8551050.0
 Occasionally5384311.67354216.7
 Regularly888968.3129110311.7
Alcohol use (drinks/months)
 <1001513214710.2149010413.5
 ≥1002141612.510516116.4
Mutagen sensitivity (breaks/cell)
 <19911009.06303616.7
 ≥1228306.710465617.9
Tumor sites (ICD-9)
 Lip (140)0220.0
 Tongue (141)10425219.2
 Salivary glands (142)0110.0
 Gum (143)013130.0
 Floor of mouth (144)114156.7
 Other parts of the mouth (145)011110.0
  Oropharynx (146)111128.3
  Nasopharynx (147)11250.0
  Hypopharynx (148)013130.0
 Other oral cavity (149)0220.0
  Esophagus (150)0110.0
  Nasal cavities (160)0110.0
  Larynx (161)11374822.9
  • a Includes those who were still smoking and people who had quit smoking for <5 years.