Nicotine levels, withdrawal symptoms, and smoking reduction success in real world use: A comparison of cigarette smokers and dual users of both cigarettes and E-cigarettes
Real world dual users were better able to maintain abstinence from cigarettes. Women dual users had higher nicotine levels/reduced craving during smoking reduction. Dual users were less motivated to quit smoking in the coming year than smokers. Dual users did not have lower levels of carbon monoxide during ad lib use.