Hi everybody. Below are the incidence numbers for end-stage renal disease in the Helsinki region for the past five years. The following question has arisen: What is the probability that the decreased incidence for 2006 is due to random variablilty and not caused by any systematic effect? 2002 75 2003 73 2004 69 2005 65 2006 28 Are there any solutions available in R? Very thankful for your answers Ralf Finne Svenska yrkesh?skolan Vasa Finland
Probability of falling incidence
2 messages · Ralf Finne, Kevin Viel
-----Original Message----- From: r-sig-epi-bounces at stat.math.ethz.ch [mailto:r-sig-epi-bounces at stat.math.ethz.ch] On Behalf Of Ralf Finne Sent: Wednesday, October 03, 2007 9:24 AM To: r-sig-epi at stat.math.ethz.ch Subject: [R-sig-Epi] Probability of falling incidence Hi everybody. Below are the incidence numbers for end-stage renal disease in the Helsinki region for the past five years. The following question has arisen: What is the probability that the decreased incidence for 2006 is due to random variablilty and not caused by any systematic effect? 2002 75 2003 73 2004 69 2005 65 2006 28 Are there any solutions available in R? Very thankful for your answers
Ralf, This is not enough data for us to be able to suggest a test. We would need to know the study design, with particular emphasis on the statistical sampling strategy (stratified, simple random sampling, etc.). 28 cases out of 1000 p-y is much different from 280 cases out of 10000 p-y, for instance. Unfortunately, I am only lurker on this list and cannot suggest a procedure in R. HTH, Kevin Kevin Viel, PhD Post-doctoral fellow Department of Genetics Southwest Foundation for Biomedical Research San Antonio, TX 78227