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Table 4 Average monthly spending and items by Arm (mean [SD])

From: Use of financial incentives and text message feedback to increase healthy food purchases in a grocery store cash back program: a randomized controlled trial

Study Arm

1

2

3

4

5

6

 

Intervention Components

Cash Back %

10%

10%

10%

25%

10 + 15%NET

10 + 15%NET

 

Weekly Text Message

None

Generic

Personalized

Personalized

Personalized

Personalized

p-values

Monthly Text Message

Standard

Standard

Standard

Standard

Standard

Unbundled

1v 2

1 v 3

2 v 3

3 v 4

4 v 5

5 v 6

Outcomes

 % Healthy Spending

24.8 (11.4)

26.8 (12.9)

24.9 (11.7)

25.7 (11.5)

25.9 (12.7)

26.5 (13.0)

0.093

0.652

0.032

0.213

0.880

0.572

 % Unhealthy Spending

24.4 (20.1)

21.7 (17.2)

22.4 (17.7)

21.7 (17.1)

23.9 (19.9)

22.3 (19.1)

0.031

0.121

0.547

0.514

0.121

0.039

 % Healthy Items

27.8 (12.5)

30.2 (13.9)

28.4 (12.7)

29.5 (12.8)

28.9 (13.6)

30.0 (14.5)

0.063

0.971

0.067

0.211

0.545

0.365

 % Unhealthy Items

29.4 (19.8)

26.6 (17.5)

27.2 (17.7)

26.3 (17.2)

28.5 (19.8)

26.9 (19.2)

0.028

0.106

0.561

0.389

0.148

0.068