In the risk factor surveys of the WHO MONICA project Augsburg 1984/85 (S1) and 1989/90 (S2), a qualitative food frequency questionnaire with 24 items was used to monitor trends in food consumption in two independent age- and sex-stratified two-stage cluster samples of the population aged 25-64 years (S1: n = 4,022; S2: n = 3,966). Alcohol intake was assessed by separate questions. From S1 to S2 slight but encouraging trends towards a better agreement with dietary guidelines could be found with a decreasing monthly consumption of meat, sausages and ham, eggs, and beer and an increasing consumption of cooked vegetables and cereals. These trends correspond well with trends in food supply data.
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Schaeffler et al. (1996) studied this question.