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.