The main goal of the study is to evaluate if the ad libitum use of the THS 2.2 Menthol (mTHS 2.2) for 5 days in confinement and after 85 days of product use in an ambulatory setting, by Japanese adult healthy smokers results in a reduction in the levels of biomarkers of exposure for selected harmful and potentially harmful smoke constituents (HPHCs) compared to smokers continuing smoking their own preferred brand of menthol conventional cigarette (mCC) and smoking abstinence (SA). Smokers who remained abstinent from SA were used as a benchmark to provide context to the exposure reduction.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
OTHER
Masking
NONE
Enrollment
160
THS 2.2 Menthol ad libitum for 5 days in confinement prolonged by 85 days in an ambulatory setting
SA for 5 days in confinement prolonged by 85 days in an ambulatory setting
Subject's own preferred brand of mCC ad libitum for 5 days in confinement prolonged by 85 days in an ambulatory setting
Osaki Hospital Tokyo Heart Center, 5-4-12, Kitashinagawa, Shinagawa-ku
Tokyo, Japan
Concentration of Monohydroxybutenyl Mercapturic Acid (MHBMA)
Concentrations measured at Day 5 in urine, adjusted for creatinine. Geometric Least Squares (LS) means are provided as descriptive statistics.
Time frame: 5 days
Concentration of 3-hydroxypropylmercapturic Acid (3-HPMA)
Concentrations measured at Day 5 in urine, adjusted for creatinine. Geometric Least Squares (LS) means are provided as descriptive statistics.
Time frame: 5 days
Concentration of S-phenylmercapturic Acid (S-PMA)
Concentrations measured at Day 5 in urine, adjusted for creatinine. Geometric Least Squares (LS) means are provided as descriptive statistics.
Time frame: 5 days
Levels of Carboxyhemoglobin (COHb)
% COHb blood measurements performed in the evening of Day 5, expressed as % of saturation of hemoglobin. Geometric Least Squares means are provided as descriptive statistics.
Time frame: 5 days
Concentration of Total 4-(Methylnitrosamino)-1-(3- Pyridyl)-1-butanol) (Total NNAL)
Concentrations measured at Day 90 in urine, adjusted for creatinine. Geometric Least Squares (LS) means are provided as descriptive statistics.
Time frame: 90 days
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