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How to adjust for trend over time in before and after comparision of count data

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Dear Stata users,
I would like to compare the number of GP visits in acute disease period with that of pre-acute period, and I want the results in terms of risk ratios. So, this is within-person analysis. When I looked in my data (visualisation) by creating some 10 time-periods of equal length before pre-acute period, I can find that there is 2% increase in GP visits per phase.

Which one is the best model to find the risk ratio in such situation (poisson, GEE, or other)?

How can I adjust for the 2% increase per phase in my analysis? Would you be able to suggest any command?
Thank you.

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