We performed propensity score matching (PSM) with age, sex, race/ethnicity, current smoking status, and smoking pack-years, considering the heterogeneity of demographic, clinical, and laboratory characteristics according to passive smoking status
Never charge it on a couch or a pillow where it is prone to overheat or get turned on accidentally Protect your vape from extreme temperatures
We use the aggregation factor of 3.0 proposed by Wald et al (1986) to express the relative probability of couples being concordant for smoking status
It's still a good blend, though I wish they'd move production back to the US (that will never happen)
They might also feel like smoking could bring them closer with their friends and coworkers because it gives them a chance to take smoke breaks together, it gives them a chance to socialize