Table 1.

Variables for sample size determination for determinants of immunization defaulters among children aged 12–23 months in Ambo town, Oromia region, Ethiopia.

Main variables	% Among controls	% Among cases	AOR	Power	Non-response rate	Sample Size for		Total
						Cases	Control
PNC attend	38%	20.4%	3.05	80%	10%	69	139	208
Counseling on vaccination	38	20.04	7.17	80%	10%	34	67	101
Fear of vaccine side effects	30.7	63	3.56	80%	10%	57	115	172
TT vaccine received	49.1	64.8	2.35	80%	10%	106	211	317