Emerg Infect Dis. 2022 Aug;28(8):1633-1641. doi: 10.3201/eid2808.220557. Epub 2022 Jul 7.
To identify demographic factors associated with delaying or not receiving a second dose of the 2-dose primary mRNA COVID-19 vaccine series, we matched 323 million single Pfizer-BioNTech (https://www.pfizer.com) and Moderna (https://www.modernatx.com) COVID-19 vaccine administration records from 2021 and determined whether second doses were delayed or missed. We used 2 sets of logistic regression models to examine associated factors. Overall, 87.3% of recipients received a timely second dose (≤42 days between first and second dose), 3.4% received a delayed second dose (>42 days between first and second dose), and 9.4% missed the second dose. Persons more likely to have delayed or missed the second dose belonged to several racial/ethnic minority groups, were 18-39 years of age, lived in more socially vulnerable areas, and lived in regions other than the northeastern United States. Logistic regression models identified specific subgroups for providing outreach and encouragement to receive subsequent doses on time.
为了确定与延迟或未接种两剂 mRNA COVID-19 疫苗系列第二剂相关的人口统计学因素，我们匹配了 2021 年 3.23 亿剂单剂辉瑞-生物技术（https://www.pfizer.com）和 Moderna（https://www.modernatx.com）COVID-19 疫苗接种记录，并确定第二剂是否延迟或错过。我们使用了两套逻辑回归模型来检查相关因素。总体而言，87.3%的接种者及时接种了第二剂（第一剂和第二剂之间≤42 天），3.4%接种了延迟的第二剂（第一剂和第二剂之间>42 天），9.4%错过了第二剂。更有可能延迟或错过第二剂的人属于几个种族/族裔少数群体，年龄在 18-39 岁之间，居住在社会脆弱地区，居住在美国东北部以外的地区。逻辑回归模型确定了特定的亚组，以便及时提供后续剂量的外展和鼓励。
