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Table 3 Grocery, Restaurant and Targeted Food Purchases (Average Dollars per Week) by Experimental Condition (n = 252)(Mean, Standard Error, and 95% Confidence Interval)

From: Financial incentives and purchase restrictions in a food benefit program affect the types of foods and beverages purchased: results from a randomized trial

 

Total

mean (SE)

Incentive

mean (SE)

95% CIa

Restriction mean (SE)

95% CI

Incentive Plus Restriction

mean (SE)

95% CI

Control

mean (SE)

95% CI

p

N

252

66

60

63

63

 

Dollars spent (average per week)

      

Groceries

 Baseline

68.5 (3.4)

72.7 (6.7)

59.5, 85.8

66.1 (7.0)

52.4, 79.9

64.9 (6.8)

51.5, 78.3

70.1 (6.8)

56.6, 83.5

 

 Follow up

101.8 (2.8)

104.2 (5.5)

93.4, 115.0

94.6 (5.8)

83.2, 105.9

102.6 (5.6)

91.5, 113.7

105.3 (5.6)

94.2, 116.4

 

 Changeb

33.3 (2.4)

31.5 (4.7)

22.2, 40.9

28.5 (5.0)

18.7, 38.3

37.7 (4.8)

28.2, 47.3

35.2 (4.8)

25.7, 44.8

.56

Restaurant

 Baseline

25.1 (1.7)

29.6 (3.4)

22.9, 36.3

23.7 (3.6)

16.7, 30.8

24.7 (3.5)

17.8, 31.6

22.0 (3.5)

15.2, 28.9

 

 Follow up

18.6 (1.5)

23.2 (2.9)

17.5, 28.9

13.9 (3.0)

7.9, 19.9

19.3 (3.0)

13.4, 25.1

17.6 (3.0)

11.7, 23.4

 

 Change

−6.5 (1.1)

−6.4 (2.2)

−10.8, −2.1

−9.8 (2.3)

−14.4, −5.3

−5.4 (2.3)

−9.9, −0.98

−4.5 (2.3)

−8.9, −0.03

.38

Fruit

 Baseline

4.0 (0.3)

3.6 (0.6)

2.5, 4.8

4.3 (0.6)

3.1, 5.6

3.7 (0.6)

2.5, 4.9

4.2 (0.6)

3.0, 5.4

 

 Follow up

7.0 (0.4)

7.0 (0.8)

5.4, 8.6

6.0 (0.9)

4.3, 7.7

8.5 (0.9)

6.8, 10.1

6.4 (0.9)

4.7, 8.0

 

 Changec

3.0 (0.3)

3.3 (0.6)

2.1, 4.6

1.7 (0.7)

0.34, 3.0

4.8 (0.7)

3.5, 6.0

2.1 (0.7)

0.86, 3.4

.01

Vegetables

Baseline

4.2 (0.3)

3.9 (0.6)

2.6, 5.1

4.6 (0.7)

3.3, 5.9

3.7 (0.7)

2.4, 5.0

4.5 (0.7)

3.3, 5.8

 

Follow up

7.1 (0.4)

6.7 (0.7)

5.4, 8.1

6.9 (0.7)

5.4, 8.3

7.7 (0.7)

6.3, 9.1

6.9 (0.7)

5.5, 8.4

 

Change

2.9 (0.3)

2.9 (0.5)

1.9, 3.9

2.3 (0.6)

1.2, 3.4

4.0 (0.5)

2.9, 5.1

2.4 (0.5)

1.3, 3.5

.10

Sugar Sweetened Beverages

Baseline

3.4 (0.3)

3.9 (0.5)

2.9, 5.0

3.7 (0.6)

2.6, 4.8

3.1 (0.5)

2.0 4.2

3.0 (0.5)

1.9, 4.1

 

Follow up

3.3 (0.2)

4.2 (0.4)

3.3, 5,0

2.3 (0.4)

1.4, 3.2

2.3 (0.4)

1.5, 3.2

4.5 (0.4)

3.6, 5.3

 

Changed

−0.1 (0.2)

0.2 (0.4)

−0.55, 1.03

−1.4 (0.4)

−2.2, −0.59

−0.8 (0.4)

−1.6, 0.01

1.5 (0.4)

0.69, 2.3

.0001

Sweet Baked Goods

Baseline

2.4 (0.2)

2.8 (0.4)

2.0, 3.6

2.3 (0.4)

1.5, 3.1

2.0 (0.4)

1.2, 2.8

2.5 (0.4)

1.7, 3.3

 

Follow up

2.6 (0.2)

3.6 (0.3)

3.9, 4.2

1.6 (0.3)

0.89, 2.2

1.9 (0.3)

1.2, 2.5

3.3 (0.3)

2.7, 4.0

 

Changee

0.2 (0.2)

0.8 (0.3)

0.10, 1.5

−0.7 (0.4)

−1.4, 0.01

−0.1 (0.4)

−0.78, 0.61

0.8 (0.4)

0.13, 1.5

.01

Candy

Baseline

1.4 (0.1)

1.5 (0.2)

1.0, 2.0

1.3 (0.3)

0.78, 1.8

1.2 (0.3)

0.69, 1.7

1.7 (0.3)

1.3, 2.2

 

Follow up

1.5 (0.1)

1.7 (0.2)

1.3, 2.2

1.0 (0.3)

0.52, 1.5

1.3 (0.2)

0.78, 1.7

2.1 (0.2)

1.6, 2.6

 

Change

0.1 (0.1)

0.2 (0.2)

−0.24, 0.72

−0.3 (0.3)

−0.76, 0.23

0.1 (0.3)

−0.41, 0.57

0.3 (0.3)

−0.16, 0.81

.36

  1. a95% Confidence Interval
  2. bChange = follow up - baseline. Baseline is the weekly average for weeks 1–4. Follow up is the weekly average for weeks 5–16. Values are unadjusted
  3. cDifference in change is significantly different (p < .05) between the Incentives Plus Restriction and the Control groups; and between the Restriction and the Incentives Plus Restriction groups
  4. dDifference in change is significantly different (p < .05) between the Incentives and the Control groups; the Restrictions and the Control groups; the Incentives Plus Restrictions and the Control group; and the Incentives and the Restrictions groups
  5. eDifference in change is significantly different (p < .05) between the Incentives and the Restrictions groups; and between the Restrictions and the Control groups
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International Journal of Behavioral Nutrition and Physical Activity

ISSN: 1479-5868

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