Objective Question Pre 1 Post 1 Post 2 ORa (95%) IC ORb (95%) IC
    (n=51) (n=47) (n=46) Post1 to Pre1 Post2 to Pre1
Nutrition            
  French fries are unhealthy because they… 88 91 98* 1.38 (0.07,27.16) 6.00 (0.69, 51.87)
  Vegetables can particularly help decrease the risk for… 57 72* 80* 1.94 (0.56, 6.75) 3.12 (1.25, 7.79)
  Oranges are high in… 67 94* 96* 7.72 (0.64,92.35) 11.00 (2.38, 59.90)
  What food or drink in high in calcium? 41 49 54 1.38 (0.45, 4.27) 1.70 (0.76, 1.90)
  What food is high in protein? 20 30 55* 1.71 (0.38, 7.78) 4.88 (1.98, 12.04)
  Which protein below is the last healthy? 78 79 80 1.06 (0.21, 5.49) 1.13 (0.42, 3.04)
  What food is good for the brain? 67 83* 89* 2.40 (0.50, 11.55) 4.10 (1.37, 12.27)
  Vegetables are particularly good for your … 63 81* 91* 2.50 (0.58, 10.82) 6.23 (1.93, 20.13)
  All of the following are considered junk food EXCEPT… 78 87* 85 1.89(0.26, 13.80) 1.53 (0.54, 4.36)
  Protein helps build strong  ________ 69 77 83 1.50 (0.36, 6.25) 2.17 (0.83, 5.70)
  Calcium helps build strong ________ 45 66* 70* 2.37 (0.73, 7.69) 2.78 (1.21, 6.42)
Exercise            
  What is one possible reason people are obese? 14 30* 65* 2.63 (0.46, 15.05) 11.79 (4.33, 32.11)
  Exercise is good for… 35 36 64* 1.04 (0.31, 3.51) 3.13 (1.36, 7.17)
  All of these are reasons why exercise is good EXCEPT 71 64 74 0.73 (0.20, 2.59) 1.18 (0.48, 2.88)
  Exercise can make your body… 92 91 93 0.88 (0.02, 31.23) 1.22 (0.26, 5.77)
aOdds ratio comparing the odds of answering correctly between post-test 1 and pre-test 1 after the first-round intervention.
b Odds ratio comparing the odds of answering correctly between post-test 2 and pre-test 1 after the second-round intervention.
*indicates p<0.05 comparing respective post-test to pre-test 1 by Student t-test.
Table 3: Percentage of students correctly answered questions on the pre- and post-tests.