Table 2.

Main ecological and social characteristics of the study groups.

Tribe	Number of Villages	Average Elevation (Feet) and Ecology	Intermarriages	Population	Main Occupation	Interviewed Study Participants
Umarzai	30	5134.5, mountainous area	Intermarriages with Haji Khel and Alisher Khel	47,025	Farmers, shepherds	23 males	3 females
Hadarzai	17	1486.2, both mountain and plain areas	Marriages within the tribe only	31,900	Shopkeepers	22 males	4 females
Haji Khel	23	1561.7, plain area	Intermarriages with Umarzai and Alisher Khel	46,015	Laborers, local sellers	21 males	5 females
Alisher Khel	15	3477.7, both mountain and plain areas	Intermarriages with Haji Khel	15,296	Collectors, farmers	22 males	4 females