Skip to main content

Table 6 Risk of lung cancer by pack-years of mentholated cigarette use among ever smokers - Los Angeles County case-control study [69]

From: Systematic review of the epidemiological evidence comparing lung cancer risk in smokers of mentholated and unmentholated cigarettes

    Pack-years of mentholated smoking
Gender/Race No of cases   0 1-15 16-31 32+ Anya
   Adjusted RR RR (CI) RR (CI) RR (CI) RR (CI)
Male/Both 202 No 1.00 0.63 (0.42-0.95) 1.40 (0.69-2.84) 2.60 (1.33-5.08) 0.92 (0.65-1.31)
   Age, raceb 1.00 0.62 (0.41-0.93) 1.35 (0.67-2.73) 2.52 (1.29-4.92) 0.90 (0.64-1.28)
   Age, race and othersc 1.00 0.87 (0.57-1.37) 1.21 (0.56-2.62) 1.48 (0.71-3.05) 1.00 (0.68-1.48)
Female/Both 135 No 1.00 0.90 (0.52-1.57) 0.83 (0.36-1.96) 0.90 (0.38-2.15) 0.89 (0.55-1.44)
   Age, raceb 1.00 0.87 (0.50-1.52) 0.68 (0.29-1.60) 0.72 (0.30-1.71) 0.80 (0.49-1.29)
   Age, race and othersc 1.00 1.58 (0.77-3.22) 0.51 (0.19-1.34) 0.41 (0.15-1.11) 0.88 (0.50-1.57)
Both/White peopled 181 No 1.00 0.64 (0.41-1.00) 1.35 (0.58-3.11) 1.80 (0.87-3.75) 0.86 (0.59-1.26)
   Age, genderb 1.00 0.68 (0.44-1.06) 1.41 (0.61-3.25) 1.78 (0.86-3.70) 0.90 (0.61-1.31)
   Age, gender and othersc 1.00 1.01 (0.61-1.68) 1.01 (0.41-2.47) 1.06 (0.47-2.36) 1.02 (0.66-1.58)
Both/Black peoplee 156 No 1.00 0.71 (0.43-1.16) 0.91 (0.44-1.89) 1.56 (0.72-3.37) 0.85 (0.55-1.32)
   Age, genderb 1.00 0.66 (0.40-1.08) 0.77 (0.37-1.60) 1.46 (0.68-3.16) 0.78 (0.51-1.21)
   Age, gender and othersc 1.00 0.96 (0.54-1.70) 0.69 (0.30-1.60) 0.90 (0.38-2.12) 0.89 (0.53-1.47)
Both/Both 337 No 1.00 0.72 (0.52-1.00) 1.20 (0.70-2.06) 1.81 (1.07-3.07) 0.93 (0.70-1.23)
   Age, race and genderb 1.00 0.70 (0.51-0.97) 1.04 (0.61-1.79) 1.64 (0.97-2.76) 0.87 (0.66-1.15)
   Age, race, gender and othersc 1.00 1.05 (0.72-1.54) 0.92 (0.50-1.68) 0.95 (0.53-1.70)f 1.00 (0.72-1.40)
  1. aRRs and CIs for any use estimated as described in additional file 1: Methods for deriving RR estimates.
  2. b The width of the estimated CI is taken to be the same as the width of the unadjusted estimates, so may be slightly too narrow.
  3. c The other adjustment factors were total pack-years and years since quitting.
  4. d White people are defined as Caucasian.
  5. e Black people are defined as African-American.
  6. f Similarly adjusted RRs and CIs are also available for 32-53 pack-years, 0.76 (0.37-1.59) and 54+ pack-years 1.38 (0.56-3.40). For 54+ pack-years these estimates did not vary between current smokers (RR 1.23, 0.36-1.42) and former smokers (RR 1.78, 0.44-7.19).