|   | 
        Coffee    use  | 
          | 
          | 
       
      
        |   | 
          | 
        Null | 
          | 
        Weekly | 
          | 
        Daily | 
        Trend | 
        Interaction | 
       
      
        | Genotype | 
        na | 
        ORb | 
        na | 
        OR (95% CI)b | 
        na | 
        OR (95%CI)b | 
        P | 
        P | 
       
      
        | Current    smokers | 
          | 
          | 
          | 
          | 
          | 
          | 
          | 
          | 
       
      
        | CYP1A2*1C | 
          | 
          | 
          | 
          | 
          | 
          | 
          | 
          | 
       
      
        | GG | 
        12/23 | 
        1.00    (referent) | 
        11/63 | 
        0.28    (0.10-0.80) | 
        31/322 | 
        0.16    (0.06-0.39) | 
        <0.0001 | 
        0.03 | 
       
      
        | GA + AA | 
        3/30 | 
        1.00    (referent) | 
        9/41 | 
        2.27    (0.49-10.5) | 
        30/235 | 
        1.37    (0.35-5.38) | 
        0.92 | 
          | 
       
      
        | CYP1A2*1F | 
          | 
          | 
          | 
          | 
          | 
          | 
          | 
          | 
       
      
        | AA | 
        5/23 | 
        1.00    (referent) | 
        8/38 | 
        0.64    (0.15-2.75) | 
        30/241 | 
        0.39    (0.11-1.37) | 
        0.10 | 
        0.52 | 
       
      
        | CA+CC | 
        10/31 | 
        1.00    (referent) | 
        13/66 | 
        0.63    (0.23-1.72) | 
        31/316 | 
        0.33    (0.14-0.81) | 
        0.008 | 
          | 
       
      
        | Nonsmokers | 
          | 
          | 
          | 
          | 
          | 
          | 
          | 
          | 
       
      
        | CYP1A2*1C | 
          | 
          | 
          | 
          | 
          | 
          | 
          | 
          | 
       
      
        | GG | 
        13/65 | 
        1.00    (referent) | 
        10/108 | 
        0.44    (0.17-1.14) | 
        24/281 | 
        0.43    (0.19-0.96) | 
        0.07 | 
        0.59 | 
       
      
        | GA+AA | 
        9/63 | 
        1.00    (referent) | 
        9/87 | 
        1.04    (0.33-3.27) | 
        17/191 | 
        0.73    (0.26-2.04) | 
        0.48 | 
          | 
       
      
        | CYP1A2*1F | 
          | 
          | 
          | 
          | 
          | 
          | 
          | 
          | 
       
      
        | AA | 
        7/63 | 
        1.00    (referent) | 
        10/80 | 
        1.56    (0.43-5.72) | 
        11/209 | 
        0.38    (0.11-1.30) | 
        0.06 | 
        0.53 | 
       
      
        | CA+CC | 
        15/67 | 
        1.00    (referent) | 
        9/115 | 
        0.34    (0.13-0.87) | 
        30/263 | 
        0.51    (0.24-1.10) | 
        0.20 | 
          | 
       
     
      OR, odds ratio; CI, confidence interval. 
      aNumber of cases/controls. 
      bAdjusted for age, hospital, rank in the Self-Defense Forces, leisure-time physical activity, body mass index, current use of alcoholic beverages (sake, shochu, beer, whisky
    and wine), past alcohol use and green tea intake. |