Table 1. Number of clusters and households selected and completed in the survey.

Variables		No. of selected communes	No. of selected clusters	No. of selected households	No. of surveyed households
Low land area		15	21	1,680	1,645
	Sub-urban area	1	2	160	158
	Rural area	14	19	1,520	1,487
Mountainous area		2	9	720	696
Total		17	30	2,400	2,341