15 HOUSEHOLD COMPOSITION ADULT (18 years and older) composition This variable included only those household members who were 18 or older whether or not they were eligible to participate in the study on the basis of nationality. ------------------------------------------------------------------ 10. One adult male head 11. One adult male head plus one other non-relative 12. One adult male head plus two or more other non-relatives 20. One adult female head 21. One adult female head plus one other non-relative 22. One adult female head plus two or more other non-relatives 30. One married couple 40. One married couple plus one other relative 50. One married couple plus two or more other relatives 51. One married couple plus one other non-relative 52. One married couple plus two or more other non-relatives 60. An unmarried* male head plus one other relative 70. An unmarried male head plus two or more other relatives 80. An unmarried female head plus one other relative 90. An unmarried female head plus two or more other relatives 99. NA *Unmarried includes divorced, separated, or widowed. ICPSR 8298 Page 43