The phrase "a broad spectrum of variables" is correct and usable in written English.
It can be used when discussing a wide range of different factors or elements that may influence a situation or outcome.
Example: "In our research, we considered a broad spectrum of variables to ensure a comprehensive analysis of the data."
Alternatives: "a wide range of factors" or "a diverse array of variables."
Economic data are likely to be of greater use to policy-makers if they cover a broad spectrum of variables including lost productivity and out-of-pocket expenses, which are best determined using patient-report.
This approach is important for the analyses described herein, because different types and a broad spectrum of variables were analyzed for the current study and, thus, a single multivariate regression model approach would be impossible.
Strengths of the study include the selection of a broad spectrum of variables as influencing factors, the use of multivariate regression modelling to assess independent effects and the large sample size.
They cast a much wider net for capturing a broad spectrum of variable that go far beyond the scope and limitations of traditional financial evaluations, such as ROI or payback (Kumar 2006).
Resolution of these possibilities awaits the much needed expansion of the Fragaria EST database to include a comprehensive diversity of tissue types, and representation of influence by a broad spectrum of environmental variables.
While cases can remain asymptomatic, infection often induces an acute febrile illness with a broad spectrum of symptoms of variable morbidity ranging from mild to fatal.
It is a chronic disease with a modest effect on life expectancy, but a broad spectrum of consequences, of variable severity, on physical and psychological characteristics, that vary between individuals and within individuals over time.
We were unable to address a broad spectrum of potentially useful variables given database limitations.
The Young-HUNT questionnaire includes a broad spectrum of health-related variables relevant for this study (http://www.ntnu.edu/hunt/data/que).
Strengths of the study included the population-based sample that is representative of adults in the United States (excellent external validity), decent sample size, good response rates, and inclusion of a broad spectrum of potential confounding variables and of several potential cardiometabolic mediators that were objectively measured.
Instead, we were able to include several types of both acute and long-term care and a broad spectrum of enabling and need variables which is a major advantage compared to earlier studies.
