Observer bias occurs when researchers alter the outcome of a study. This process is not typically deliberate, and involves extremely subtle changes both in the way researchers interact with subjects in the study and in what observers choose to see.
What is an elevated INR? The INR, or International Normalized Ratio, is a measure of how long it takes your blood to clot. A prothrombin time (PT) is a another blood test done to help measure your INR. The higher your PT or INR, the longer your blood takes to clot. An elevated PT or INR means your blood is taking longer to clot than your healthcare provider believes is healthy for you. When your PT or INR is too high, you have an increased risk of bleeding. What increases my risk for an elevated INR?
It is just a shift in the way your body is working. This is why it is of the utmost importance to regularly monitor your INR without fail. Even if you ate the same exact thing every day, sometimes you will still get elevations and decreases in PT/INR. Vitamin K will actually make it go down not up. OTC meds like acetaminophen can make it spike high.