<p>Data Dictionary.</p>

Only 14 children (8.3%) received all vaccinations on time. Immunization delay was observed in 154 (91.7%) children, with 28 (16.7%) of children with delay at a single visit and 126 (75.0%) at multiple visits. Missed doses were highest at 18 months (36.3%), followed by 12 months (14.9%).

Timely vaccination dropped sharply from 98.6% at birth to 52.4% at 9 months, and 37.5% at 18months. The most common reason for delay was lack of knowledge about the vaccination schedule (54.8%). In adjusted analysis, lack of knowledge of schedule (aOR = 3.85; 95% CI: 1.04–14.24) and perceived vaccine availability (aOR = 4.74; 95% CI: 1.09–20.51) were significantly associated with delay.

No sociodemographic factors were significant.</p> <p>Conclusion</p><p>Immunization delay is highly prevalent among children in Baghdad. Interventions focusing on caregiver knowledge and ensuring consistent vaccine supply are urgently needed, particularly for children in the second year of life. However, due to purposive sampling, these findings may not be generalizable to all of Baghdad or Iraq.</p></div>