Your first study has even used women who had admitted to the hospital and therefore used the shared hospital toilet bidets. I think this fact alone would make it enough to disqualify it.
Apart from hospital bidet being a one extra germ filled surface the patient touches, it raises the following questions. Was there a problem with the brand of bidet used in the hospital that might cause more of an uncontrolled spray? Did the particular toilet bowl shape contribute to the result? Non of these stays the same within the general population and any outliers would be cancelled out in a huge dataset.
Your first study has even used women who had admitted to the hospital and therefore used the shared hospital toilet bidets. I think this fact alone would make it enough to disqualify it.
Apart from hospital bidet being a one extra germ filled surface the patient touches, it raises the following questions. Was there a problem with the brand of bidet used in the hospital that might cause more of an uncontrolled spray? Did the particular toilet bowl shape contribute to the result? Non of these stays the same within the general population and any outliers would be cancelled out in a huge dataset.