Association of infant mortality rate and death rate for age 1–4 years with per-capita state social sector expenditure from 1997 to 2009, using a mixed-effects regression model.

Expenditure is measured in log per-capita terms and averaged for the five years ending in the index year. 95% confidence intervals are given in parentheses.aStatistically significant coefficient (5% level)支出以人均对数尺度进行计量，并对以指数基准年为截止的五年期数据求取平均值。括号内标注95%置信区间（confidence interval）。[注a] 系数在5%显著性水平下具备统计学意义。