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Table 1 Variables extracted and used for this study

From: Predictors for the uptake of optimal doses of sulfadoxine-pyrimethamine for intermittent preventive treatment of malaria during pregnancy in Tanzania: further analysis of the data of the 2015–2016 Tanzania demographic and health survey and malaria indicator survey

Variable

Definition

Categories

Outcome variable

 Uptake of IPTp-SP

Three or more doses of doses of IPTp-SP is optimal

 < 3 doses

 ≥ 3 doses (optimal)

Explanatory variables

 Age

Woman’s age group

15–19

20–24

25–29

30–34

35–39

40–44

45–49

 Marital status

Woman’s marital union status

Never in union

In union

No longer in union

 Education level

Woman’s highest level of education

No formal education

Primary education

Secondary education and beyond

 Place of residence

Area or place where a woman was residing

Urban

Rural

 Occupation

Woman’s occupation

Unemployed

Self-employed

Employed

 Wealth index status

Household’s wealth index from which a woman is coming

Poorest

Poor

Middle

Rich

Richest

 Parity

Number of live births that a woman had ever had

1

2

3 + 

 Timing of 1st ANC visit

Gestational age (pregnancy) age in months at which a woman visited ANC for first time

First trimester

Second trimester

Third trimester

 Number of ANC visits

Number of ANC visits a pregnant women made during her gestation period

01-Mar

4 + 

 Type of facility for ANC visit

Type of ownership of a facility (Government or non-government) that a woman was attending for ANC

Non-government

Government

 Geographical zone

Geographical zone from which a woman was residing

Western

Northern

Central

Southern highlands

Southern

South west highlands

Lake

Eastern

Zanzibar