"How many patients are treated every year? NHS Scotland admitted and later discharged 1.2 MILLION people in 2017/18 alone. https://www.isdscotland.org/Health-Topics/Hospital-Care/Publications/2018-09-25/2018-09-25-Annual-QuarterlyAcuteActivity-Report.pdf? So, only 1 in every 3 529 complained or 0.028%.

How many complained In England? The total for 2017/18 was an astonishing 94 637. https://digital.nhs.uk/data-and-information/publications/statistical/data-on-written-complaints-in-the-nhs/2017-18 Assuming 12 million were treated (10 times the population) that’s 1 in every 127 or 0.78%!

This is a huge difference of clear statistical significance. What might explain it?"
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