Table 1. Infant and maternal characteristics, status as a late starter, and age in days at first immunization.
aAmong all infants
bAmong late starters
cp<0.01, based on Chi-square analysis for proportion of late starters and Kruskal-Wallis for number of days late
dFor a family of four as per U.S. Census data
CI = confidence interval
FPL = federal poverty level