A March 2007 national poll by a Michigan hospital has concluded that parents are increasingly concerned about the safety of the Internet. Smoking and drug abuse still top the list, with respectively 40% and 39% of respondents concerned about the two similar issues. That doesn't mean Internet safety isn't on the minds of US parents: it's number 7 on the top 10 list at 26% of parents calling it a big problem. According to the study, women were more likely to call it a big problem: 32% of them rated it as a large area of concern compared to just 21% of men. Internet safety fell in between teen pregnancy (28%) and school violence (24%) – the survey was conducted prior to the Virginia Tech massacre. Respondents of all income and education levels had similar levels of concern about the World Wide Web according to the researchers.