Just a quick note: "We determined there that the confounding demographic variables were statistically significant." could be rephrased as "Given the demographic variables had a statistically significant impact on the number of complaints, they were identified as potentially confounding variables and taken into consideration in modelling the relationship between number of complaints and salary"
Just a quick note: "We determined there that the confounding demographic variables were statistically significant." could be rephrased as "Given the demographic variables had a statistically significant impact on the number of complaints, they were identified as potentially confounding variables and taken into consideration in modelling the relationship between number of complaints and salary"