Soyang Kwon, Sarah Welch, Maryann Mason
Physical education environment and student physical activity levels in low-income communities
BMC public health
us births increased 3 2005 2006 4265996 largest number since 1961 crude birth rate rose 1 142 per 1000 population general fertility rate increased 3 685 per 1000 women 15 44 years births birth rates increased among race hispanicorigin groups teen childbearing rose 3 2006 419 per 1000 females aged 15 19 years first increase 14 years steady decline birth rates rose 2 4 women aged 20 44 rates youngest 1014 years oldest 4549 women unchanged childbearing unmarried women increased steeply 2006 set new historic highs cesareandelivery rate rose 3 2006 311 births figure 50 last decade preterm low birth weight rates also increased 2006 128 83 respectively 2005 infant mortality rate 689 infant deaths per 1000 live births statistically higher 2004 level nonhispanic black newborns continued twice likely nonhispanic white hispanic infants die first year life 2004 gender race groups combined expectation life birth reached record high 779 years 2005 ageadjusted death rates united states continue decline crude death rate children aged 1 19 years decreased significantly 2000 2005 10 leading causes death children 2005 death rate cerebrovascular disease slightly 2000 whereas accident chronic lower respiratory disease death rates decreased large proportion childhood deaths however continue occur result preventable injuries