help forming the results section of dissertation im doing a systematic review

this instructions are to look up several papers 4 per drug. so i’d be looking at one diazepam paroxetine and hydroxyzine. so what i’m required to do is to look at clinical trials observe the percentage change in HAMA scores(rating scale) and then form a table comparing the percentage changes of the 3 drugs and a placebo, this table is done through spss system. then i’m required to form a bar chart showing the difference before and after treatment and showing which one is significantly better

 

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