Logistic regression analysis and Poisson regression analysis

Code to conduct logistic regression analysis to test for associations between the presence of any animal care policy and journal characteristics (impact factor, open-access status, animal welfare legislation in country of the journals’ headquarters, and whether the journal was conservation-oriented). We centered all predictors (subtracted the mean from each observation) and scaled (divided by 2 SDs). This file also includes code for a Poisson regression analysis to test for associations with number of criteria detected among journals that had an animal care policy and the same journal characteristics. For the latter, criteria were considered fulfilled if a journal received any score other than “none”.