However, if consumers are able to avoid purchasing poor-quality antimalarials, then the prevalence of poor-quality antimalarials as determined by random samples would overestimate true consumption patterns.
7 8 Reported purchasing from commercial sources has declined following the introduction of these restrictions, 9 10 although widespread reductions in youth smoking prevalence have not always resulted.
The report states: The current lack of a consistent, standard definition of what is meant by 'free-range', coupled with the prevalence of varying industry certification schemes, makes it difficult for consumers to know whether the products they are purchasing meet their expectations.
Most conservatively, we can at least conclude that once young adults reach the age when they can legally purchase and consume alcohol, the prevalence of alcohol use increases whereas the prevalence of marijuana use does not and trends in a negative direction for marijuana-only use.
Intermediate outcomes of most interest are awareness of point of sale advertising, cigarette brand awareness, perceived ease of access to cigarettes, attempts to purchase cigarettes, perceived youth smoking prevalence, and pro-tobacco attitudes.
Where patients purchase their medicines may affect the prevalence of substandard/counterfeit medicines.
However, purchase alone does not explain a high MRSA prevalence, since grow-to-finish operations purchased pigs most frequently of all production types, but did not show the highest MRSA prevalence.
‡Standardized number of live chickens purchased annually (product of the proportionate buying rate [purchasing prevalence x numbers of male and female respondents buying at that rate x multiplier]).
Calves and young animals are the age groups most usually purchased and also the age groups with the highest prevalence of lice [ 7, 15, 26].
In an attempt to determine the prevalence of palytoxin in aquarium store zoanthids, we purchased several colonies from local aquarium stores and analyzed them for palytoxin.
The prevalence of substandard/counterfeit antimicrobials was significantly higher when purchased from unlicensed outlets (p<0.000; 95% CI 0.21 to 0.32).
