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Factors associated with delayed measles vaccination among children in Shenzhen, China: a case-control study
Weiyan Lin1, Yongzhen Xiong, Hao Tang
1a Department of Epidemiology and Biostatistics ; Dongguan , China.
Insights
Delayed measles-containing vaccine (MCV1) uptake in infants is linked to several factors, including immigrant status and parental beliefs. Timeliness of MCV1 vaccination is a key indicator of immunization program quality.
Area of Science:
- Pediatrics
- Public Health
- Epidemiology
Background:
- Measles outbreaks can be exacerbated by delayed first doses of measles-containing vaccine (MCV1).
- Infants under one year old are particularly vulnerable to high measles incidence during outbreaks.
Purpose of the Study:
- To identify factors associated with delayed MCV1 vaccinations in children.
- To evaluate the timeliness of MCV1 vaccination as a quality indicator for immunization programs.
Main Methods:
- Utilized data from the China Information Management System for Immunization Programming.
- Conducted telephone surveys with parents/guardians of 430 children with delayed MCV1 vaccinations and 424 children with timely vaccinations.
Main Results:
- Children were less likely to receive timely MCV1 vaccinations if they were from immigrant groups, male, had poor health, had fathers in managerial roles, had prior delays in other Expanded Programs on Immunization (EPI) vaccinations, had parents who undervalued vaccinations, or faced shorter travel and longer waiting times at clinics.
- Children of mothers with technician occupations were more likely to receive timely MCV1 vaccinations.
Conclusions:
- Factors such as socioeconomic status, parental attitudes, and healthcare system logistics influence MCV1 vaccination timeliness.
- The timeliness of MCV1 vaccination serves as a crucial indicator for assessing the quality and effectiveness of immunization services.
Abstract:
A delay in the first dose of measles-containing vaccine (MCV1) may contribute to outbreaks of measles, resulting in a high age-specific incidence in infants<1 y of age. To determine the factors associated with delayed MCV1 vaccinations, we used data from the China Information Management System for Immunization Programming. Additionally, the parents/guardians of 430 children whose MCV1 vaccinations were delayed, as well as the parents/guardians of 424 children who received timely vaccinations, were surveyed by telephone. Children were less likely to receive timely MCV1 vaccinations if they belonged to an immigrant group, were male, had poor health status, had a father whose occupation e.g., a manager, had a history of delays in other Expanded Programs on Immunization (EPI) vaccinations, had parents who did not believe vaccinations were important for their children, and experienced shorter travel times to and longer waiting times in EPI clinics. The children of mothers whose occupational status (technician) were more likely to receive timely MCV1 vaccinations. The timeliness of MCV1 vaccinations should be considered as an additional indicator of the quality of vaccination programs.
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