In an article published earlier this month, Ettman et al. (Ettman and colleagues) estimated the prevalence of depression symptoms among US adults before and during the COVID-19 pandemic. (You can – but you do not have to – find the article here.
In an article published earlier this month, Ettman et al. (Ettman
and colleagues) estimated the prevalence of depression symptoms among US adults before and during the COVID-19 pandemic. (You can – but you do not have to – find the article here.) Data from before the pandemic were collected in 2017-2018 from a nationally representative sample of people. Data during the pandemic were collected in March-April 2020 from a different nationally representative sample of people (different people from the 2017-2018 survey). For both surveys, depression symptoms were assessed using the Patient Health Questionnaire-9, a clinically validated questionnaire with scores that could range from 0 to 20. Participants were classified as having depression symptoms if they had a score of 10 or greater.
a. Why is it appropriate to calculate prevalence rather than incidence of depression symptoms given the data from this study?
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