Webmd.com states over 2 million americans (mostly women) have RA. See link below <a href="http://rds.yahoo.com/_ylt=A0oGkjv2YPpHo24A6nhXNyoA;_ylu=X3oDMTEzZjFoYjh1BHNlYwNzcgRwb3MDNARjb2xvA3NrMQR2dGlkA0RGRDVfMTE5/SIG=129dkip3c/EXP=1207677558/**http%3a//www.webmd.com/rheumatoid-arthritis/default.htm" target="_blank">http://rds.yahoo.com/_ylt=A0oGkjv2YPpHo24A6nhXNyoA;_ylu=X3oDMTEzZjFoYjh1BHNlYwNzcgRwb3MDNARjb2xvA3NrMQR2dGlkA0RGRDVfMTE5/SIG=129dkip3c/EXP=1207677558/**http%3a//www.webmd.com/rheumatoid-arthritis/default.htm</a> So, less than 1% (math right?) would have had RA if these percentages held up in the trials. Ken