Dear All, I am conducting a meta-analysis and I'm being given the trials, number of patients on each trial, mean, standard deviation and sampling number for both treatment and control. I also collected some background information for each trial. these information include both categorical factors and continuous factors such as experimental position and experimental duration. I would like to use a mixed model in our analysis to estimate the total mean effect size, and test the statistical significance of each explanatory factor. I will very much appreciate if you are able to guide me through on how write this SAS code. Thanks. Here is a template of my dataset: trial exp_posit exp_durat mean_of_treat stand_dev_of_treat numb_on_treat mean_of_contr stand_dev_of_contr numb_on_contr 1 Germany 3 44.14 8.33 5 47.93 10.89 5 2 USA 5 80.14 25.62 5 64.14 7.68 5 3 USA 16 140.18 39.2 8 144.14 73.06 8 4 Germany 4 35.53 9.19 8 37.12 12.67 8 5 USA 8 8.94 5.31 3 9.87 3.95 3 6 UK 12 19.43 16.32 3 10.92 8.83 3 7 Germany 4 20.86 2.65 4 0.71 0.81 4 8 UK 15 23.16 11.47 3 49.57 24.26 3 9 Germany 9 25.64 21.61 7 32.02 20.29 7 10 UK 7 10.5 7.93 3 8.56 3.97 3 Kind regards, Roy
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