Vanita Sahni1, Florence Y Lai1, Shannon E MacDonald2. 1. Alberta Health Surveillance and Assessment, Edmonton, Alberta, Canada; 2. Department of Pediatrics, University of Calgary, Calgary, Alberta, Canada; and Faculty of Nursing, University of Alberta, Edmonton, Alberta, Canada smacdon@ualberta.ca.
Abstract
BACKGROUND: Neonatal Vitamin K prophylaxis is an effective intervention for reducing vitamin K deficiency bleeding. A recently published report of parental refusal of vitamin K prompted an investigation of the prevalence and characteristics of this group, and exploration of whether these same parents were likely to subsequently refuse immunization for their children. METHODS: We conducted a retrospective population-based cohort study of all infants born in Alberta between 2006 and 2012 by using linkage of administrative health data. Risk factors for vitamin K refusal were determined by using Poisson regression. The association between vitamin K refusal and nonimmunization was assessed using relative risk. RESULTS: Among the 282378 children in the cohort, 99.7% received vitamin K and 0.3% declined. Midwife-assisted deliveries were more likely to be associated with vitamin K refusal compared with physician-attended delivery (risk ratio 8.4, 95% confidence interval [CI] 6.5-11.0). Planned home delivery (risk ratio 4.9, CI 3.8-6.4) or delivery in a birth center (risk ratio 3.6, CI 2.3-5.6) were more likely to result in decline of vitamin K compared with hospital delivery. Vitamin K refusal was associated with a 14.6 (CI 13.9-15.3) higher relative risk of having no recommended childhood vaccines at 15 months. CONCLUSIONS: This is the first population-based study to characterize parents who are likely to decline vitamin K for their infants and whose children are likely to be unimmunized. These findings enable earlier identification of high-risk parents and provide an opportunity to enact strategies to increase uptake of vitamin K and childhood immunizations.
BACKGROUND: Neonatal Vitamin K prophylaxis is an effective intervention for reducing vitamin Kdeficiency bleeding. A recently published report of parental refusal of vitamin K prompted an investigation of the prevalence and characteristics of this group, and exploration of whether these same parents were likely to subsequently refuse immunization for their children. METHODS: We conducted a retrospective population-based cohort study of all infants born in Alberta between 2006 and 2012 by using linkage of administrative health data. Risk factors for vitamin K refusal were determined by using Poisson regression. The association between vitamin K refusal and nonimmunization was assessed using relative risk. RESULTS: Among the 282378 children in the cohort, 99.7% received vitamin K and 0.3% declined. Midwife-assisted deliveries were more likely to be associated with vitamin K refusal compared with physician-attended delivery (risk ratio 8.4, 95% confidence interval [CI] 6.5-11.0). Planned home delivery (risk ratio 4.9, CI 3.8-6.4) or delivery in a birth center (risk ratio 3.6, CI 2.3-5.6) were more likely to result in decline of vitamin K compared with hospital delivery. Vitamin K refusal was associated with a 14.6 (CI 13.9-15.3) higher relative risk of having no recommended childhood vaccines at 15 months. CONCLUSIONS: This is the first population-based study to characterize parents who are likely to decline vitamin K for their infants and whose children are likely to be unimmunized. These findings enable earlier identification of high-risk parents and provide an opportunity to enact strategies to increase uptake of vitamin K and childhood immunizations.
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