Summary of baseline characteristics of trial participants included in the analysis.

Some data elements were not available (N/A) in certain trials. Trial numbering corresponds to numbering in a comprehensive review of all MRC studies[3], where full references for trial report(s) are listed. Trials conducted in East and Central Africa are listed in Table 1.7, trials conducted in Hong Kong in Table 1.8 and trials conducted in Singapore in Table 1.9 of the review[3].
*The results of this trial were never published (personal communication, DA Mitchison) and it is therefore not included in the tables of MRC studies in Fox, Ellard and Mitchison[3]. IQR - Inter-Quartile Range.