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