Reducing Appetite: They signal to your brain that you are satisfied, leading to reduced calorie intake
BMC Bioinformatics 11 , 119 (2010)
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Spearmans rho is a statistical tool that is used to determine the strength of a monotonic relationship (meaning a relationship where one variable consistently moves with another variable.) The correlation coefficient is always between -1 and +1, with -1 meaning a perfect negative monotonic relationship (for example, as one variable goes down the other consistently goes up,) 0 meaning no monotonic relationship, and +1 meaning a perfect positive monotonic relationship (for example, as one variable goes down, the other also goes down.) While there is some controversy about interpretation, generally a finding of 0.34-0.35 as we see here is considered to be in the weak correlation category
That balancing act is not something an article can do for you, and its not something your surgeon can do without your prescriber either