Factors associated with unimmunised children in sub-Saharan Africa, identified by multilevel logistic regression models.

*paModel 1 is null model, baseline model without any determinant variable.bModel 2 is adjusted for control variable alone.cModel 3 is additionally adjusted for control variable and individual-level factors.dModel 4 is additionally adjusted for control variable and community-level factors.eModel 5 is additionally adjusted for control variable and country-level factors.fModel 6 is additionally adjusted for control variable and individual-, community-, and country-level factors.