Fish consumption was assessed with a frequency question with six response options: “How often do you usually eat fish or fish meals? Please consider the last six months.” Responses were 1, less than once a month or never; 2, once or twice a month; 3, once a week; 4, twice a week; 5, almost daily; and 6, once a day or more often. Respondents who selected 1 or 2 were considered infrequent
fish consumers.