Table 2.

Characteristics of the six municipalities by land area, population (year 2000) and number of study children enrolled in the study.

Characteristics	Tagbilaran	Dauis	Panglao	Baclayon	Cortes	Balilihan	Total
Land area (in km2)	30.61	42.88	55.37	34.02	43.77	150.22	356.87
Total population	77, 700	26, 415	21,337	14,996	12,702	16,837	169,987
PNF13 and EPI children enrolled	6,102	2,259	1,564	846	926	1,074	12,771
Waypoints collected
Households
At birth	5,784	2,234	1,551	835	919	1,060	12,383
Different at 2 years old	437	101	45	46	77	93	799
Transient	7	6	1	1	6	5	26
Landmarks	624	607	260	102	191	198	1,982

For each municipality there are the numbers of household locations, where the study children were born, and the number of household locations where the study children were living at the age of 2 years. Transient children (not permanently living in area) were separately counted