Statistical analysis:
Data was tabulated using Statistical Package for the Social Sciences
software version 22 (SPSS Inc. v.22) and analysis of these data was done
to determine the statistical inference of the variables in question.
All patients’ numerical characteristics was described as mean ± SD or
proportions as relevant, and nominal data as number and percentage. RHD
prevalence with exact 95% confidence intervals were computed for the
whole sample.
Prevalence rates of RHD between categories of was compared with the use
of exact chi square test. Odds ratios with exact confidence intervals
for positive diagnosis was calculated. A 2-sided P value <
0.05 was considered statistically significant.