Additional file 1 of Validation of age-specific survival prediction in pediatric patients with blunt trauma using trauma and injury severity score methodology: a ten-year Nationwide observational study

Additional file 1: Supplement 1. Number of patients with missing data by age group and for each variable.

附加文件1：补充材料1。按年龄分组及各变量统计的缺失数据患者例数。