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Title: Timeliness of Childhood Vaccination Coverage: the Growing Up in Singapore Towards Healthy Outcomes Study
Authors: Loy S.L. 
Cheung Y.B. 
Chan J.K.Y. 
Soh S.E. 
Godfrey K.M.
Tan K.H. 
Shek L.P.-C. 
Chong Y.-S. 
Lek N. 
Yap F. 
Teoh O.H. 
Yung C.F. 
Thoon K.C. 
Keywords: Age-appropriate
Childhood immunization
Issue Date: 2020
Publisher: Springer
Citation: Loy S.L., Cheung Y.B., Chan J.K.Y., Soh S.E., Godfrey K.M., Tan K.H., Shek L.P.-C., Chong Y.-S., Lek N., Yap F., Teoh O.H., Yung C.F., Thoon K.C. (2020). Timeliness of Childhood Vaccination Coverage: the Growing Up in Singapore Towards Healthy Outcomes Study. Prevention Science 21 (3) : 283 - 292. ScholarBank@NUS Repository.
Abstract: Studies investigating timeliness for childhood vaccination are limited especially in Asia. We examined the timeliness of vaccine administration and associated factors among infant and young children in Singapore. A total of 782 children born between November 2009 and July 2011 from a prospective cohort in Singapore were studied. Vaccination records from birth to 24 months of age were obtained from the National Immunization Registry of Singapore. Multivariable logistic regression models were performed. By 2 years of age, 92.8% of children in our cohort experienced a delay in receiving 1 or more vaccine doses according to the recommended national immunization schedule. When vaccinations were reviewed by series for each vaccine, 15.6% received all vaccine series outside the recommended age ranges. Factors associated with receiving vaccination series outside the recommended ages included maternal aged ≤ 35 years (OR 2.00; 95% CI 1.09, 3.66), Malay (1.71; 1.01, 2.89) or Indian ethnicity (2.06; 1.19, 3.59), low monthly household income (1.91; 1.14, 3.18), having at least four children (3.46; 1.62, 7.38) and private (3.42; 1.80, 6.48) and multiple vaccination providers (3.91; 1.23, 12.48). These findings show an unacceptably high proportion of children experienced a delay in the receipt of their vaccinations. The identification of several demographic, socioeconomic, health-seeking behavioural and vaccine provider factors provides opportunities for targeted interventions to enhance the timeliness of childhood vaccination in Singapore. © 2020, Society for Prevention Research.
Source Title: Prevention Science
ISSN: 13894986
DOI: 10.1007/s11121-019-01078-2
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