"basic demographic" is a correct and usable phrase in written English.
For example, you could use it in a sentence like, "The survey gathered basic demographic information from participants."
Basic demographic and clinical characteristics were collected.
Voting in state after state has just revealed the same basic demographic divide at work.
All patients provided written informed consent, and basic demographic information was collected.
Gridded Population of the World, Version 4 (GPWv4): Basic Demographic Characteristics, Revision 10.
They collected basic demographic information and asked them about their behaviour on Facebook.
Like national polls, state Election Day exit polls include basic demographic variables in each study.
Then, too, the basic demographic demand for new homes, the forecasters say, is 1.7 million units a year.
Information was collected on basic demographic variables, women's knowledge, attitudes, and cigarette and argileh smoking.
The experiments designed allowed us to know the basic demographic parameters of S. littoralis.
Basic demographic and health history was collected.
Table 2 shows basic demographic characteristics by bystander type.
