For less statistically minded readers, latent class analysis is a sophisticated data reduction technique, which assumes that the population contains two or more sub-types (classes) and uses the data to classify people empirically into different classes on the basis of a set of variables (in this case, smoking status at each time point)
[70] A reduced harm from using these products has not been proven
The half-life of COT is approximately 1319 h, which is much longer than that of NIC or 3HC (approximately 5 h) 23,24
To avoid the need to replace entire stockpiles every few years at significant expense, and because it was recognized through testing that certain products remained stable beyond their labeled expiration dates when properly stored, the Shelf-Life Extension Program (SLEP) was established in 1986
Draw was good, construction was good and I had some uneven burn