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Table 1 Central ideas and corresponding proportion (%) of total key expressions generated in response to the first survey question on what “healthy eating” means

From: Does knowledge of evolutionary biology change high school students’ attitudes about healthy eating?

1. A balanced and/or varied diet37.8%
2. Calorie and/or portion control23.5%
 Subtotal (broad concepts)61.3%
3. Avoiding certain foods18.4%
4. Including certain foods11.2%
 Subtotal (specific “do’s and don’ts”)29.6%
5. Other9.1%