Essays / Help with critical appraisal essay (Physiotherapy degree) [2]

Hello everyone. I am new to this forum. I was hoping I could get some help/guidance for critical appraisal essay I need to do for my Physiotherapy degree.

It is a 2500 word critical appraisal on a quantitative questionnaire study. I have looked at the CASP tools but im not sure which one I should use for this type of study. Does anyone know or can anyone suggest another appraisal tool?

I also have the book by Trisha Greenhalgh 'How to Read a Paper'. Can anyone suggest any other books to guide me through this lengthly appraisal?

Thanks in advanced.