Non-married partners are only traceable in the registers if the couple has children together. A second stratification variable was created for age group in decades. Dog ownership was defined as periods registered or having a partner registered as a dog owner in either of the two dog registers (Supplementary Figure https://titusvniar.ja-blog.com/36265244/poco-conocidos-hechos-sobre-reporte-de-accidente-de-trabajo