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Table 3 Associations of predictors of antenatal folic acid and iron supplementation in Northern Tanzania 1999–2008 from the multiple regression analysis

From: Factors associated with prenatal folic acid and iron supplementation among 21,889 pregnant women in Northern Tanzania: A cross-sectional hospital-based study

   % Receiving folic acid (n = 3,758)a   % Receiving Iron (n = 4,887)a   % Receiving iron + folate (n = 3,508)a
   Adjustedb OR (95% CI)   Adjustedb OR (95% CI)   Adjustedb OR (95% CI)
Woman's marital status
Married 1   1   1  
Not Married   1.14(1.01–1.28)*   1.14 (0.99–1.29)   1.14 (1.00–1.29)
Woman's age
26-35 1   1   1  
Under 26   1.02 (0.93-1.12)   1.05 (0.96–1.16)   1.05 (0.96-1.16)
Over 35   1.17 (1.02-1.34)*   1.25 (1.08–1.43)*   1.25 (1.08-1.43)**
Woman's tribe
Chagga 1   1   1  
Pare   1.16 (1.02-1.32)*   1.16 (1.01-1.32)*   1.16 (1.01-1.32)*
Other   1.00 (0.91-1.10)   0.99 (0.89-1.09)   0.99 (0.89-1.09)
Woman’s highest education level
None   1.29 (0.96-1.74)   1.34 (0.99-1.81)   1.34 (0.99-1.81)
Primary (1–7)   1.02 (0.92-1.13)   1.05 (0.95-1.16)   1.05 (0.95-1.16)
Secondary (8–11)/Higher (12+) 1   1   1  
Woman's occupation
Professional 1   1   1  
Housewife   1.16 (1.01-1.34)*   1.28 (1.10-1.49)**   1.28 (1.10-1.49)**
Other   0.88 (0.77-1.01)   0.96 (0.94-1.14)   0.96 (0.84-1.11)
Partner's tribe    
Chagga 1   1   1  
Pare   1.13 (0.99-1.29)   1.13 (0.99-1.30)   1.13 (0.99-1.30)
Other   1.04 (0.95-1.14)   1.03 (0.94-1.14)   1.03 (0.94-1.14)
Partner’s highest educational level
None   1.29 (0.80-2.08)   1.27 (0.78-2.07)   1.27 (0.78-2.07)
Primary (1–7)   1.09 (0.99-1.19)   1.08 (0.98-1.18)   1.08 (0.98-1.18)
Secondary (8–11)/Higher (12+) 1   1   1  
Partner's occupation
Professional 1   1   1  
Skilled worker   0.67 (0.56-0.79)***   0.72 (0.61-0.86)   0.72 (0.61-0.86)***
Other   1.13 (1.01-1.26)*   1.20 (1.06-1.35)*   1.20 (1.06-1.35)**
Before Pregnancy
Y   0.57 (0.53-0.62)***   0.55 (0.51-0.60)***   0.55 (0.50-0.60)***
N 1   1   1  
Other diseases before pregnancy c
Y   0.62 (0.55-0.70)***   0.58 (0.51-0.66)***   0.58 (0.51-0.66)***
N 1   1   1  
Maternal HIV
Y   1.30 (1.06-1.59)*   1.31 (1.06-1.62)*   1.31 (1.06-1.62)*
N 1   1   1  
Status unknown   1.54 (1.42-1.67)***   1.63 (1.50-1.76)***   1.63 (1.50-1.76)***
Parity    
First Child 1   1   1  
Not first child   0.73 (0.66-0.80)***   0.75 (0.68-0.82)***   0.75 (0.68-0.82)***
Number of antenatal care visits
“0-1”   0.57 (0.42-0.77)***   0.60 (0.45-0.70)***   0.60 (0.45-0.79)**
"2-3"   0.72 (0.60-0.85)***   0.80 (0.72-0.88)***   0.80 (0.72-0.88)**
“4-8”   0.88 (0.76-1.03)   1.13 (0.97-1.33)   1.13 (0.97-1.33)
"9-15" 1   1   1  
Preeclampsia & Eclampsia
Y   0.48 (0.38-0.61)***   0.42 (0.33-0.54)***   0.42 (0.33-0.54)***
N 1   1   1  
Anemia
Y   12.03 (9.66-14.98)***   10.81 (8.72-13.39)***   10.81 (8.72-13.39)***
N 1   1   1  
Malaria
Y   0.45 (0.41-0.51)***   0.44 (0.40-0.50)***   0.44 (0.40-0.50)***
N 1   1   1  
Infections
Y   0.45 (0.42-0.49)***   0.41 (0.37-0.44)***   0.41 (0.37-0.44)***
N 1   1   1  
Other diseases during pregnancy c    
Y   0.55 (0.44-0.69)***   0.46 (0.36-0.59)***   0.46 (0.36-0.59)***
N 1   1   1  
  1. a Number included in the multiple regression model is 21,027 (862 observations had one or more missing values).
  2. b All variables are in the adjusted model.
  3. c “Other diseases before pregnancy” included diabetes, heart disease, epilepsy, liver disease, sickle cell, TB, and lung disease. “Other diseases during pregnancy” included gestational diabetes, tuberculosis, diabetes, hypertension, epilepsy, bleeding, jaundice, schistosomiasis, heart disease and lung disease.
  4. * p ≤ 0.05.
  5. ** p ≤ 0.01.
  6. *** p ≤ 0.001.
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