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Confidence Interval problem

I've worked out that the number needed to treat for a certain drug is 189.
However the confidence interval that my CHI program has calculated are -60 to 150.

Have I gone wrong somewhere or is this believeable (how can I interpret this?)
Original post by Moonkin
I've worked out that the number needed to treat for a certain drug is 189.
However the confidence interval that my CHI program has calculated are -60 to 150.

Have I gone wrong somewhere or is this believeable (how can I interpret this?)


Since 189∉(−60,150)189\not\in (-60,150) it looks as if something is wrong.
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Moonkin
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Original post by ghostwalker
Since 189∉(−60,150)189\not\in (-60,150) it looks as if something is wrong.


This is really frustrating as I'm certain I've put the values in correctly but this doesn't make sense urghh
Reply 3
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Moonkin
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Okay so I worked out that my values are correct but still my interpretation is not getting anywhere.

I download a biostatistics program and it confirmed my CI was correct however...

It listed the 95% CI as 60(harm) to INFINITY to 137 (benefit). Which I dont even understand as normally this program gives values as x(benefit) to x(benefit)

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