Quick query about which statistical test to perform!

[tajn]

Hi Everyone,

I am fairly new to the world of statistics as I work mainly in the clinical field. I have a query regarding which statistical test I should use for my data. 

I have 37 patients, 3 of which experienced a total of 6 complications in hospital. 34 patients therefore experienced zero complications. Which statistical test would I use validate the argument that if you experience one complication, you are more likely to experience another? 

Similarly I have another data set where 9 people underwent a procedure, 1 patient experienced 2 complications. 

If you could shed some light on how I go about this it would be very much appreciated! 

Thanks so much,

[cyprusprior]

wrong forum. Use this one instead:

http://stats.stackexchange.com/