Occupation categories are: ???Housewife???; ???Day laborer???, which includes people working as maids and domestic servants; ???Small business???, which includes those employed in a family or other small business; and ???Owner???, which includes those working as a patr??n or owner of a small businessSocio-economic status and body mass index in low-income Mexican adultsSoc Sci Med. ;64(10):2030-204