Spanish to English Medical Medical (general) medication prescription criteria

This is from an article that discusses criteria for prescribing statins based on cost-effectiveness criteria (and the impacts of these decisions on patients' health). The sentence in question reads:

"En Cataluña, uno de los indicadores del CatSalut para la evaluación de la prescripción de estatinas, tanto en atención primaria como especializada, es el porcentaje de uso de simvastatina respecto al total de estatinas."

I don't understand the use/meaning of the word "indicadores" here. If I assume it's "indicators" [this is the most common translation I find] I still don't understand the meaning of the sentence.

Please help me understand the sentence and what is the best way to translate this word "indicadores" in this context.

Thanks for your help!

[CatSalut is the Catalan Health Service]