Characteristics of US children and their parents.
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1Statistics are reported either as means with 95% Confidence Interval (CI) for continuous variables or percentages with their 95% Confidence Interval (CI) for categorical variables. 2Chi-square tests were used to test for between-group differences for categorical variables; t-tests were used for continuous variables. Source: Medical Expenditure Panel Survey, 2006–2007.
创建时间：
2013-06-10
