# Confidence Interval problemWatch

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#1
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?)
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5 years ago
#2
(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 it looks as if something is wrong.
0
#3
(Original post by ghostwalker)
Since 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
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#4
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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