Fig. 3.
Participation in polio supplementary immunization activities (SIAs) in non-polio-endemic sub-Saharan African countries among users of routine immunization (RI) services, by compliance with the routine oral poliovirus vaccine (OPV) schedulea
*P < 0.01; **P < 0.05; ***P < 0.10 (for differences in participation between compliant and non-compliant RI service users, by logistic regression analysis).
a SIAs appear in chronological order, moving clockwise, starting with the 1999 Burundi SIA. Data denote the adjusted proportions of children participating in an SIA among compliant RI service users (defined as children who owned a health card that reflected receipt of each required OPV dose by the target age) and non-compliant RI service users (defined as children who owned a health card that did not reflect receipt of each required OPV dose by the target age).
