For quantitative data, data entry clerks will carry out double entry of the raw data from questionnaires and clinical record forms in an electronic form into Microsoft Access. After data entry, data cleaning will be carried out to identify errors and inconsistencies for correction. Analysis will be carried out using Stata version 8. Summary statistics, odds ratios, confidence limits and p-values will all be calculated to compare outcomes between the two groups for the primary end point and secondary endpoints. Stratified analysis will be carried out based on age, sex, distance from health facility and household wealth. Means of continuous variables such as rise in haemoglobin count will be compared using the Student t-test. Geometric means will be used to compare parasite densities. Qualitative data will be analysed using Textbase Alpha after converting the transcribed text file into an ASCII file.