Hi, I am running gee for longitudinal analysis and am encountering a prob: ERROR: No valid observations due to invalid or missing values in the response, explanatory, offset, frequency, or weight variable. The code i am running is : Proc genmod data=dietdiv2 ; class hhid peduc(ref='1'); Model stuntingall3= peduc/type3 dist=poisson link=log; repeated subject=hhid/type=ind; estimate 'peducn' peduc 1 -1 1/exp; run; The exposure (peduc) is measured at visit 1 (baseline) and the outcome(stuntingall) at visit 3: SAS Output stuntingall3 Frequency Percent CumulativeFrequency CumulativePercent01Frequency Missing = 19042 2907 71.62 2907 71.62 1152 28.38 4059 100.00 peduc Frequency Percent CumulativeFrequency CumulativePercent12Frequency Missing = 18150 2383 48.13 2383 48.13 2568 51.87 4951 100.00 Any thoughts on how i can address the errors? Thanks.
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