I've had my quad test results back today. The covering letter says I've been reported as a screen negative with the risk being less than 1 in 250. My screening info book says that the cut off for low risk is 1 in 250, therefore putting me in the nearest category to the high/low risk cut off. My previous pregnancies have given me much better odds, being 1 in the 1000's. I'm 35 so I know my age will be a factor that brings the risk ratio down.
There's then an attachment showing the actual medical results and an interpretation. This says screen negative and gives a risk of 1 in 7,700 at term.
Can someone shed any light on why the two pieces of information are so wildly different?
I can list the marker results too if that would mean anything to anyone. Thanks in advance.
Unless I've misunderstood your post: your letter says your risk is less than 1 in 250 which is the cut off for high risk. the attachment goes into more detail saying your actual risk is 1 in 7,700 (ie extremely low) - they are not contradictory, one just elaborates on the other. They're only interested if you are over 1 in 250 or under because that's how they quantify risk. The 1 in 7,700 is just more detailed information, and very reassuring.
Thanks. I think the thing that was confusing me is that the booklet that comes from the mw regarding the screening talks about bands of risk results, with 1 in 250 being succeeded by 1 in 500, 1 in 2000 etc. I guess I presumed that I'd be given a higher band on the letter if my actual risk was the 1 in 7700 - which, yes, is a very reassuring result.
I might feedback that their covering letter can lead to confusion when read in conjunction with their booklet.