Mehdi Osooli

4 Questions 12 Answers 0 Followers

Questions related from Mehdi Osooli

How to calculate age specific incidence rates using stata in longitudinal data model?

I have longitudinal data on registered arthropathy diagnoses for my study subjects including main group and a comparison group. As the data include 22 years of follow up, I want to see the pattern...

17 January 2017 6,585 5 View

How to extract few letters of a string variable in stata?

Dear Colleagues, I have been trying to extract the first three characters of an ICD variable. I tried using the following command: substr(icd_code,1,3) I get an error saying that "unrecognized...

07 March 2016 1,400 13 View

How to back translate regression cofficients of log and square-route transformed ouctome and independent variables?

Hi Evereyone, I was running OLS and had problem of non-linearity of the association in the model. I used then the log and square-route transformations respectively for the outcome and some...

15 November 2015 962 10 View

What are the best methods to anonymously link clinical registry data?

We are performing an international registry. Our database is online and each participating centre has its own user account to a private space in the database. This is like having many registries...

22 October 2013 6,975 8 View