st: Stats for model fit - metareg

[Frank Peter <frankpeter@Safe-mail.net>]

Dear All,

I am using meta-regression to examine association between log of relative risk and age at which participants were recruited. I want to compare different models (assuming linear, cubic spline - 3, 4, 5 knots). Please, how can I determine which the best fit, I mean which statistics can I used to compare these models

Thanks
Frank

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