It is important to note that we kept full age ranges because we did not wish to truncate age in 90% of countries in order to accommodate the few that had more restricted age ranges, but we also wished to retain those few surveys in the total. The presentation of estimates specific to the 18–29-y age range is unaffected by these differences however, and the same patterns of cross-country results was observed in that instance. We also do not have an “urbanicity” variable in most countries that could be considered comparable, so thus far in the WMHS papers we have not studied urbanicity in cross-national work.
