this is the cbs evening news with scott pelley. pelley: we begin tonight with a story that could affect virtually every woman. today the american cancer society revised its guidelines for screening for breast cancer, a disease that kills 40,000 american women every year. it now says that women should get their first mammogram years later than previously recommended. we asked our dr. jon lapook what s behind this change. ready? reporter: ready or not, today 49-year-old kimberly taylor finally got her first mammogram. i really took the advice of the doctor at first in consideration, but it was very confusing. reporter: in recent years medical groups have disagreed about when to start screening and how often to do it. a major test suggested mammography every other year starting at 50. the american cancer society previously recommended annual screenings beginning at 40. women of average risk be screened annually starting at 45, then every two years starting at 55. dr.
a disease that kills 40,000 american women every year. it now says that women should get their first mammogram years later than previously recommended. we asked our dr. jon lapook what s behind this change. ready? reporter: ready or not, today 49-year-old kimberly taylor finally got her first mammogram. i really took the advice of the doctor at first in consideration, but it was very confusing. reporter: in recent years medical groups have disagreed about when to start screening and how often to do it. a major test suggested mammography every other year starting at 50. the american cancer society previously recommended annual screenings beginning at 40. today s new guidelines recommend women of average risk be screened annually starting at 45, then every two years starting at 55. dr. kevin oeffinger of memorial sloan kettering cancer center chaired the guidelines panel. from 45 on we felt that annual mammography gave us our best chance of both reducing premature mor
pelley: we begin tonight with a story that could affect virtually every woman. today the american cancer society revised its guidelines for screening for breast cancer, a disease that kills 40,000 american women every year. it now says that women should get their first mammogram years later than previously recommended. we asked our dr. jon lapook what s behind this change. ready? reporter: ready or not, today 49-year-old kimberly taylor finally got her first mammogram. i really took the advice of the doctor at first in consideration, but it was very confusing. reporter: in recent years medical groups have disagreed about when to start screening and how often to do it. a major test suggested mammography every other year starting at 50. the american cancer society previously recommended annual screenings beginning at 40. today s new guidelines recommend women of average risk be screened annually starting at 45, then every two years starting at 55. dr. kevin oeffinger
american women every year. it now says that women should get their first mammogram years later than previously recommended. we asked our dr. jon lapook what s behind this change. ready? reporter: ready or not, today 49-year-old kimberly taylor finally got her first mammogram. i really took the advice of the doctor at first in consideration, but it was very confusing. reporter: in recent years medical groups have disagreed about when to start screening and how often to do it. a major test suggested mammography every other year starting at 50. the american cancer society previously recommended annual screenings beginning at 40. today s new guidelines recommend women of average risk be screened annually starting at 45, then every two years starting at 55. dr. kevin oeffinger of memorial sloan kettering cancer center chaired the guidelines panel. from 45 on we felt that best chance of both reducing premature mortality as well as balancing the potential harms associated
the cbs overnight news will be right back. almost sixty million americans are affected by mental illness. together we can help them with three simple words. my name is chris noth and i will listen. from maine to maui, thousands of high school students across the country are getting in on the action by volunteering in their communities. chris young: action teams of high school students are joining volunteers of america and major league baseball players to help train and inspire the next generation of volunteers. carlos pea: it s easy to start an action team at your school so you, too, can get in on the action. if you were a hippie in the 60s, you need to know. it s the dawning of the age of aquarius. yeah, and something else that s cool. what? osteoporosis is preventable. if you dig your bones, protect them. all: cbs cares! president obama took a rare swipe at donald trump in an interview with national public radio. the president said trump is capitalizing on the resentme