Table 1.

Variables used in the study

Variable	Definition	Measurement scale
IPTp-SP uptake (Primary outcome)	Two or less (≤2) doses is incomplete and three or more (3+) is optimal	Nominal/binary
Explanatory variable
Age group	Age of a woman	Nominal
Marital status	Marital status of a woman	Nominal
Residence (Zone)	Type of woman’s residence	Nominal/binary
Education	Level of education of woman	Nominal
Occupation	Woman’s occupation	Nominal
Religion	Woman’s religion	Nominal
Tribe	Woman’s tribe	Nominal
First pregnancy	Woman’s first pregnancy	Nominal/binary
Parity	Number of birth that a woman had after 20 weeks gestation	Nominal
Timing of 1st ANC visit	Age of the pregnancy a first time a woman visited antenatal care clinic (ANC)	Nominal
ANC visits	Number of antenatal care visits a pregnant woman made during her gestation period	Nominal
Gravida	Total number of confirmed pregnancies that a woman had regardless of the outcome	Nominal
Knowledge of malaria transmission	Three items (sugarcane, mosquito, witchcraft). If only mosquito is selected as the an agent of transmission, then the person is knowledgeable, otherwise inadequate knowledge	Nominal/binary
Knowledge of dangers of malaria in pregnancy	Three items (abortion, still birth, low birth weight) indicated knowledgeable of consequences of malaria in pregnancy. Otherwise, inadequate knowledge	Nominal/binary
Took SP under DOT each time	Whether a woman took SP under direct observation therapy (DOT) strategy or not	Nominal/binary
Permission to go to HF	Seeking permission from spouse to visit health facility (HF) for ANC	Nominal/binary
Distance to HF	Distance to health facility from a woman’s residence	Nominal/binary
Transport to HF	Transportation to heath facility	Nominal/binary
Need for spouse escort to HF	Spouse escort to health facility	Nominal/binary
Worried no health provider at HF	Worried that there would be no health care provider	Nominal/binary
Worried no drugs at HF	Worried that there might be no drugs at clinic	Nominal/binary