hey let's have a prohibition!!! we could arrest everyone caught possessing incense and make it's production and supply illegal. That should fix the problem! [/sarcasm]
lol my mom just told me this 10 minutes ago when i got home. she kinda made it seem like "incense" was code word for "weed." she was all like, 'you know the news had some thing about how incense gives you lung cancer. you should really stop using that shit.'
You can still find a statistical significance which indicates correlation. 80% is very statistically significant, even more so when you have another 60,000 to confirm that statistical significance. Especially since these cancers were all upper-respiratory and lung.