For the earlier surveys with no sharing toilet question, a version was run comparing with the baseline (Vietnam 2002) with V225 not included in the unsatisfied basic need. The country regressions were then run on this baseline.

For the Bangladesh surveys, BD31, BD3A, BD41 and BD4J codes 11 and 21 of HV205 were considered improved unshared although sharing was not used in the calculation of the comparative wealth index.