You could measure smoking cessation as a person not smoking a cigarette for 1 month, or as a person who has not smoked in a year, or a 50% reduction in the number of cigarettes smoked. Clearly the operational definition of the dependent variable is an important step in the design of the study.Some other health related conceptual variables that have many operational definitions: intelligence, fitness, health, quality of life.ou could measure smoking cessation as a person not smoking a cigarette for 1 month, or as a person who has not smoked in a year, or a 50% reduction in the number of cigarettes smoked. Clearly the operational definition of the dependent variable is an important step in the design of the study.
The majority of influenza vaccines distributed in the United States contain thimerosal as a preservative. However, an increasing amount is thimerosal-free. While the multiple dose vials still have thimerosal to prevent bacterial growth, the single-dose preparations do not.The amount of influenza vaccine that is thimerosal-free is growing every year. Thimerosal contains ethyl mercury. 2  This is a different chemical compound than mercury found in the environment (methylmercury). 3  Thimerosal has been used as a preservative since the 1930s to prevent bacterial growth in vials containing multiple doses of vaccine and other medical products.
Flovent hfa (latest outcomes from 402 users) has active ingredients of fluticasone propionate. It is often used in asthma. On Sep, 28, 2015: 2,957 male patients aged 62 who take the same drugs are studied in Proair Hfa vs Flovent Hfa.