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December 6th, 2014, 02:35 AM   #1
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Problem finding what the rate stands for

Hello people,

I'm doing a data project on heart surgery. I have the data but I can't figure out what the rate means. For example there's one hospital which performed 6,865 heart surgeries. Of these, 234 resulted in the patient dying. The data says this is a mortality rate of 136.0. But it doesn't say what that rate is. Is it per 100 cases? Per 1000? I've done maths for these but they didn't turn out right. However, I wouldn't be surprised if I did something wrong. Anyone able to help? Thanks
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December 6th, 2014, 03:17 PM   #2
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The answer is 3.4%. The text should explain how it got their number.
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December 6th, 2014, 05:07 PM   #3
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Simpler example:
6000 operations : 240 died

240/6000 = .04 = 4%
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December 7th, 2014, 04:20 AM   #4
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136/3.4% = 4000, so 136.0 of about 4000 patients having heart surgery died. Maybe about 4000 heart surgeries/year/hospital on average?
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