Identify the Independent and Dependent Variable(s) in This Statement

Identify the independent and dependent variable(s) in this statement:
"The primary purpose of the present study was to test a new strategy for treating burnout and to compare it to the traditional strategy normally used in rehabilitation for burnout in Finland. We analyzed the short-term and long-term effects of both interventions on the outcome variables (burnout symptoms and perceived job conditions) over an intervention lasting one year."