Table 3 Error in estimate of number of calories purchased, Philadelphia vs. Baltimore

  Overestimated by >100 kcal

11.9

14.4

25.6

15.3

  Correctly estimated within 100 kcal

18.9

15.5

10.2

14.2

  Underestimated by >100 kcal

69.2

70.0

64.2

70.5

−5.4

0.90 (0.67-1.21)

0.48

  Overestimated by >250 kcal

9.6

10.3

21.6

11.7

  Correctly estimated within 250 kcal

32.6

34.8

29.7

33.9

  Underestimated by >250 kcal

57.9

54.9

48.7

54.5

−8.7

0.82 (0.65-1.04)

0.095

  Overestimated by >500 kcal

6.8

5.6

14.5

7.3

  Correctly estimated within 500 kcal

53.6

58.8

53.3

55.6

  Underestimated >500 kcal

39.6

35.6

32.2

37.1

−8.8

0.75 (0.73-0.77)

<0.001***

  Overestimated by >100 kcal

9.8

11.1

25.0

8.5

  Correctly estimated within 100 kcal

7.3

4.8

3.4

6.2

  Underestimated >100 kcal

82.9

84.1

71.6

85.3

−12.5

1.27 (1.03-1.56)

0.028*

  Overestimated by >100 kcal

14.3

17.4

26.3

21.7

  Correctly estimated within 100 kcal

31.7

25.2

17.7

21.7

  Underestimated >100 kcal

54.0

57.5

55.9

56.6

2.7

0.54 (0.37-0.78)

0.001**

  Overestimated by >100 kcal

12.0

16.2

20.7

14.0

  Correctly estimated within 100 kcal

17.5

16.6

9.9

14.4

  Underestimated >100 kcal

70.4

67.3

69.5

71.6

−5.3

0.81 (0.60-1.08)

0.15

  Overestimated by >100 kcal

11.4

13.2

21.9

17.5

  Correctly estimated within 100 kcal

20.5

13.6

8.8

14.3

  Underestimated >100 kcal

68.2

73.3

69.3

68.2

6.2

1.38 (1.25-1.53)

<0.001***

  Overestimated by >100 kcal

12.0

15.3

25.4

15.0

  Correctly estimated within 100 kcal

22.2

16.1

8.6

13.5

  Underestimated >100 kcal

65.9

68.5

66.0

71.6

−2.9

0.96 (0.60-1.52)

0.86

  Overestimated by >100 kcal

13.9

14.7

26.4

17.4

  Correctly estimated within 100 kcal

14.8

10.5

13.8

16.3

  Underestimated >100 kcal

71.3

74.7

59.8

66.3

−3.1

1.29 (0.85-1.96)

0.22

  Overestimated by >100 kcal

8.6

12.1

26.5

11.9

  Correctly estimated within 100 kcal

21.4

14.8

9.0

13.0

  Underestimated >100 kcal

70.0

73.1

64.5

75.1

−7.6

0.82 (0.60-1.13)

0.22

  Overestimated by >100 kcal

13.6

18.7

21.4

20.0

  Correctly estimated within 100 kcal

15.7

17.1

7.9

16.4

  Underestimated >100 kcal

70.7

64.2

70.8

63.6

0.7

1.16 (0.93-1.44)

0.18

  Overestimated by >100 kcal

14.6

20.9

26.5

23.4

  Correctly estimated within 100 kcal

12.7

18.6

16.3

14.9

  Underestimated >100 kcal

72.7

60.5

57.1

61.7

−16.8

0.25 (0.12-0.50)

<0.001***

  Overestimated by >100 kcal

10.4

16.7

25.2

15.3

  Correctly estimated within 100 kcal

19.8

16.1

10.3

19.6

  Underestimated >100 kcal

69.8

67.3

64.5

65.0

−3.0

0.88 (0.44-1.81)

0.77

  Overestimated by >100 kcal

14.6

20.9

26.5

23.4

  Correctly estimated within 100 kcal

12.7

18.6

16.3

14.9

  Underestimated >100 kcal

72.7

60.5

57.1

61.7

−16.8

1.71 (0.12-12.76)

0.63

  Overestimated by >100 kcal

12.6

17.5

27.5

18.2

  Correctly estimated within 100 kcal

40.2

32.9

24.5

24.2

  Underestimated >100 kcal

47.1

49.6

48.0

57.6

−7.0

0.73 (0.34-1.60)

0.44

  Overestimated by >100 kcal

11.8

13.4

25.0

14.5

  Correctly estimated within 100 kcal

14.1

9.6

5.1

11.2

  Underestimated >100 kcal

74.2

77.1

69.9

74.3

−1.5

0.97 (0.81-1.15)

0.72

  Overestimated by >100 kcal

15.8

8.8

21.0

8.9

  Correctly estimated within 100 kcal

6.9

5.1

2.0

5.4

  Underestimated >100 kcal

77.2

86.1

77.0

85.7

0.2

1.23 (1.05-1.44)

0.012*

  Overestimated by >100 kcal

10.8

16.4

27.2

17.5

  Correctly estimated within 100 kcal

22.2

19.1

12.9

17.2

  Underestimated >100 kcal

66.9

64.5

59.9

65.2

−7.8

0.84 (0.61-1.16)

0.29