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

Table 7 Risk of lung cancer by percentage of mentholated cigarettes smoked - Los Angeles County case-control study [69]

			Percentage of mentholated smoking
Gender/Race	No of cases		0	1-19	20-74	75-100	Any^a
		Adjusted	RR	RR (CI)	RR (CI)	RR (CI)	RR (CI)
Both/Both^b	337	No	1.00	0.87 (0.59-1.29)	0.84 (0.55-1.29)	1.09 (0.73-1.63)	0.93 (0.70-1.23)
		Age, race^c and gender	1.00	0.94 (0.64-1.39)	0.73 (0.48-1.12)	0.94 (0.63-1.41)	0.87 (0.66-1.15)
		Age, race, gender and others^d	1.00	1.11 (0.71-1.72)	0.90 (0.55-1.45)	1.02 (0.65-1.63)	1.01 (0.74-1.40)

^a RRs and CIs for any use estimated as described in additional file 1: Methods for deriving RR estimates.
^b Caucasian and African/American people.
^c 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.
^d The other adjustment factors were total pack-years and years since quitting.

ISSN: 1471-2466