In Reply We thank Wang and Niu as well as Reddy and Ahuja for their thoughtful comments about our work.¹ Wang and Niu pointed out that owing to growth in the total US population from approximately 282 million in 2000 to 327 million in 2017, the total numbers reported in our study might not comparable across years. While proportions reported in our study should help mitigate these concerns and population estimates for children ages 0 to 17 years (our population of interest) were stable during this time, from approximately 72 million in 2000 to 73 million in 2017,² we certainly agree that per capita estimates are extremely useful and should be considered along with total numbers and proportions. We clarify that data for 50 states and the District of Columbia was included for analyses.

在答复中，我们感谢Wang和Niu以及Reddy和Ahuja对我们的工作提出的深思熟虑的意见。¹ Wang和Niu指出，由于美国总人口从2000年的约2.82亿增长到2017年的3.27亿，我们的研究报告的总数可能无法与多年相比。尽管我们研究中报告的比例应有助于缓解这些担忧，并且这段时期内0至17岁儿童（我们感兴趣的人群）的人口估计数保持稳定，从2000年的约7200万人到2017年的7300万人，²我们当然同意，人均估计数非常有用，应与总数和比例一起考虑。我们澄清说，包括了50个州和哥伦比亚特区的数据以进行分析。