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Table 3 Comparison of background characteristics between exposed and unexposed groups, prior to and following propensity score matching

From: Comparing two approaches for estimating the causal effect of behaviour-change communication messages promoting insecticide-treated bed nets: an analysis of the 2010 Zambia malaria indicator survey

  % prior to matching (n = 3,263) % following matching (n = 3,227)
  Exposed Unexposed p-value Exposed Unexposed p-value
Age       
    15-24 years (ref)       
    25-34 years 22 42 0.001 20 20 1.000
    35-49 years 32 34 0.399 33 33 1.000
Education       
    None (ref)       
    Primary 36 52 0.001 36 36 1.000
    Secondary or more 64 15 0.001 63 63 1.000
Province       
    Central, Copperbelt (ref)       
    Eastern, Northern, Luapula 30 45 0.001 30 30 0.955
    Lusaka 4 13 0.001 3 4 1.000
    Western, Southern, North-Western 35 35 0.853 36 36 1.000
Has a child under the age of 6 years 60 66 0.005 60 60 1.000
Upper two wealth quintiles 65 47 0.001 66 66 0.956
Lives in an IRS district 84 90 0.001 86 86 1.000
Lives in an urban area 28 17 0.001 28 28 0.953