Anders Erickson

5 Questions 17 Answers 0 Followers

Questions related from Anders Erickson

Can you answers my questions about x-level interactions in Stata?

In a random-slope model, the addition of Level-2 (L2) covariates implies a x-level interaction between the random Level-1 variable and the L2 covariate. In Stata (and maybe R, SAS), despite it's...

02 July 2014 9,116 3 View

Cross-level interactions between centered variables

Is it proper procedure to create the x-level interaction term outside the model using the non-centered variables then center the new interaction term to include in the model? Testing both ways...

08 February 2014 9,647 3 View

Geocoding Canadian postal codes spanning over multiple years and the PCCF

Any researchers out there geocoding Canadian postal codes that span a decade using the StatCan PCCF? I'm trying to figure out the PCode Birth and Retirement dates and using different updates of...

20 December 2012 7,951 0 View

What are the leading hypotheses on the increasing trend of gastroschisis?

there seems to be a 'real' (not due to reporting or classification) increasing trend in gastroschisis in several countries reporting to EuroCat as well as in Canada. Young maternal age is one risk...

04 September 2012 5,444 6 View

Are stillbirths always excluded from rates/counts of preterm birth or low birth weight?

For the perinatal epidemiologists. In working with a large population-based perinatal registry dataset, I've assigned a missing value to gestational age and birth weight variables for...

29 August 2012 8,825 8 View