Table 1: Comparison of sociodemographic variables of the three groups.

VariableIAMPMRControl value

Sex*Male18.2 20.5 16.7 .908
Female81.8 79.5 83.3

Age* (years)18-1977.3 77.3 72.2 .837
20 and above22.7 22.7 27.8

Education*Completed school13.6 15.9 22.2 .823
Degree65.9 63.6 63.9
Postgraduate20.5 20.5 13.9

*Figures are percentages.