Selection bias occurs when the association between exposure and health outcome is different for those who complete a study compared with those who are in the target population. Sources of selection bias. Selective survival and losses to follow-up After enrollment of subjects and collection of baseline data there is
NUMBER OF PUBLIC PHOTOS UPLOADED IN 2013. - 680 million, - 56.7 million per month in average, - 1.86 million per day in average. NUMBER OF PUBLIC PHOTOS UPLOADED IN 2012. - 556 million, - 46.3 million per month in average, - 1.52 million per day in average. NUMBER OF PUBLIC PHOTOS UPLOADED IN 2011. - 575 million, - 47.9 million per month in average, - 1.57 million per day in average.
With over 300 million users sharing more than 70 million photos and videos each and every day as of January 2015, itâs not all that surprising to realize that several big Instagram users are raking in big bucks from the millions of people who follow them and engage with their posts.nce you have your landing page set up, you can simply copy and paste the URL into your Instagram bioâs website link. Instead of sending leads to another companyâs email form, youâll be sending them to your own.