"comparative outcomes" is correct and usable in written English.
You can use it to refer to the different results or effects that result from two similar situations or practices. For example, "We conducted a study to compare the comparative outcomes of two different types of interventions."
As Markus Kitzmueller and Jay Shimshack note in a recent review article in The Journal of Economic Literature, virtually no research even tries to assess the comparative outcomes of private and public regulation.
At the same time Ofqual is conducting a policy of "comparative outcomes" - insisting that exam boards should be working towards ensuring results are "broadly" the same as in the previous year.
He said grade inflation had largely been checked by exams regulator Ofqual insisting on "comparative outcomes" in exams between one year and another "so on the face of it this is more likely to be about a desire on the part of the Government to get more actively involved in determining content standards".
Few studies have rigorously evaluated the comparative outcomes of autografts and fresh-frozen allograft tissue for ACL reconstruction.
The relative efficacy of surgery over nonoperative treatment for the treatment of cLBP remains controversial, and little is known of the long-term comparative outcomes.
Long-term comparative outcomes for radiofrequency ablation (RFA) versus partial nephrectomy (PN) for the primary treatment of clinical T1a renal cell carcinoma (RCC) have not previously been reported.
Comparative outcome studies have been equivocal, and studies comparing resource utilization are scant.
Comparative outcome studies, however, are lacking following primary pediatric robotic-assisted laparoscopic pyeloplasty (RALP).
Thus there is a lack of good evidence with regards to the comparative outcome of the modern porous-coated cup and the traditional cemented all-polyethylene cup.
First, the results showed that the macro-measurements provide comparative outcome measures to generate insight into the overall effectiveness of forensic psychiatric treatment.
The sample for this study consisted of patients who had participated in a comparative outcome study on cognitive therapy for panic disorder.
