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Table 1 Social demographic characteristics of the participants (N = 450)

From: Improving pregnant women’s knowledge on danger signs and birth preparedness practices using an interactive mobile messaging alert system in Dodoma region, Tanzania: a controlled quasi experimental study

VariableInterventionControlTotal/out of 450
n%n%n%
Age
  < 20 yrs2114.06120.38218.2
 20–34 yrs.11174.021270.732371.8
  ≥ 35 yrs1812.0279.04510.0
Education status
 Primary school8254.718260.726458.7
 Secondary school5234.79531.714732.7
 College/University1610.6237.6398.6
Occupational status
 Non-employed5436.09030.014432.0
 Self-employed9261.320668.729866.2
 Employed42.741.381.8
Marital status
 Not married2516.77224.09721.6
 Married12583.322876.035378.4
Obstetric characteristics of participants
 Gravidity
  13322.06421.39721.6
  2–410972.721772.332672.4
   ≥ 585.3196.4276.0
 Parity
  13724.78428.012126.9
  2–410771.320267.330968.7
   ≥ 564.0144.7204.4
Gestation age at delivery in weeks
  < 37 weeks1711.33812.75512.2
 37–40 weeks11677.424180.335779.4
  ≥ 40 weeks1711.3217.0388.4
Gestation age at first visit in weeks
 1–12 weeks5637.313645.319242.7
 13–20 weeks9462.716454.725857.3
Age at first pregnancy in years
  < 20 yrs5838.715652.021447.4
 20–34 yrs9060.014347.723452.0
  ≥ 35 yrs21.310.330.6
Total number of antenatal care visits
 1–3 visits149.37224.08619.1
  ≥ 4 visits13690.722876.036480.9