2 results match your criteria: "Danish Epidemiology Science Centre and Statens Serum Institut[Affiliation]"
DTP vaccination and child survival in observational studies with incomplete vaccination data.
Trop Med Int Health
January 2007
Bandim Health Project, Danish Epidemiology Science Centre and Statens Serum Institut, Bissau, Guinea-Bissau, Denmark.
Background: Observational studies of diphtheria-tetanus-pertussis (DTP) vaccine from longitudinal study sites have reported divergent effects on child survival, ranging from 10-fold reduction to threefold increased mortality. None of these studies had complete information on DTP vaccinations from both survivors and children who died. We reviewed the data analysis methodology to assess whether methodological differences could explain the divergent results.
View Article and Find Full Text PDFSurvival bias in observational studies of the impact of routine immunizations on childhood survival.
Trop Med Int Health
January 2007
Bandim Health Project, Danish Epidemiology Science Centre and Statens Serum Institut, Copenhagen, Denmark.
Objectives: In situations with vaccination coverage high enough to control pertussis, observational studies have reported divergent effects of diphtheria-tetanus-pertussis (DTP) vaccination on childhood survival. We examined whether this could be because of methodological differences.
Methods: Some studies of the impact of DTP updated information on vaccination retrospectively (retrospective updating approach) while others kept vaccination status fixed for the time between follow-up visits (landmark approach).