I find difficulty applying all items of PRISMA while writing SR. which review guidelines of ttt. It does not include any RCTs, so I can't apply Nany items such as risk of bias and its results. The journal requires following PRISMA. I am puzzled.
I'm confused: if it is neither a RCT nor an observational study, what kind of study do you expect to find and review? Perhaps a DTA (diagnostic test accuracy) study?