Table 2.
Pretest and posttest results of the food knowledge questionnaire.
| Food group | Questions, N | Pretest, mean (SD) | Posttest, mean (SD) | P valuea | Change | |
| All foods | 90 | 56.95 (10.71) | 67.88 (10.71) | <.001 | +19% | |
| Healthy and unhealthy foods |
|
|
|
|||
|
|
Healthy foods | 49 | 29.13 (6.47) | 35.72 (7.03) | <.001 | +23% |
|
|
Unhealthy foods | 41 | 27.67 (9.01) | 32.37 (6.43) | <.001 | +16% |
| Food category |
|
|
|
|
|
|
|
|
Animal-derived food | 5 | 1.70 (1.28) | 2.57 (1.24) | <.001 | +47% |
|
|
Cereals with fat | 16 | 10.83 (3.46) | 13.00 (2.54) | <.001 | +19% |
|
|
Fast food | 3 | 2.10 (1.07) | 2.38 (0.83) | .002 | +14% |
|
|
Fat-free cereals | 8 | 4.27 (1.34) | 5.25 (1.34) | <.001 | +23% |
|
|
Fat-free sugar | 10 | 7.38 (1.65) | 8.58 (1.65) | <.001 | +16% |
|
|
Fruit | 7 | 6.07 (1.02) | 6.58 (0.94) | <.001 | +9% |
|
|
Legumes | 3 | 1.73 (0.63) | 2.03 (0.78) | <.001 | +18% |
|
|
Oils and fats | 6 | 3.97 (1.34) | 5.00 (0.99) | <.001 | +27% |
|
|
Prepared food | 23 | 11.68 (3.42) | 14.98 (3.70) | <.001 | +24% |
|
|
Sugar with fat | 3 | 2.15 (0.90) | 2.30 (0.72) | .22 | —b |
|
|
Vegetables | 6 | 4.92 (1.29) | 5.40 (0.98) | <.001 | +11% |
aP value of <.05 was considered statistically significant.
bNot applicable.