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Table 4 Change in self-efficacy for purchasing, eating and preparing fruits and vegetables by intervention condition

From: Cluster randomized controlled trial of a mobile market intervention to increase fruit and vegetable intake among adults in lower-income communities in North Carolina

Self-Efficacy Item   Intervention (n = 64) Control (n = 64) Intervention Effect Adjusted Mean Difference† (SE), p-value
1. How easy or hard would it be for you to buy more fruits and vegetables than you normally do the next time you shop? Baseline, mean (SD) 6.74 (3.24) 6.90 (3.01) 0.31 (0.44)
Adjusted Change†, mean (SE) 0.71 (0.31) 0.40 (0.32) p = 0.49
2. How easy or hard would it be for you to use all of the fruits and vegetables that you buy before they go bad? Baseline, mean (SD) 7.35 (2.73) 6.83 (2.71) −0.01 (0.40)
Adjusted Change†, mean (SE) 0.46 (0.29) 0.47 (0.29) p = 0.98
3. How easy or hard would it be for you to work more fruits and vegetables than you normally do into meals for yourself and your family? Baseline, mean (SD) 7.26 (2.72) 7.29 (2.60) 0.54 (0.42)
Adjusted Change†, mean (SE) 0.46 (0.30) −0.08 (0.30) P = 0.21
4. How easy or hard would it be for you to work more fruits and vegetables than you normally into snacks for yourself and your family? Baseline, mean (SD) 7.04 (3.05) 7.09 (2.71) 1.23 (0.53)
Adjusted Change†, mean (SE) 1.10 (0.38) −0.13 (0.38) p = 0.02*
5. How easy or hard would it be for you to cook vegetables in a way that is appealing to your family? Baseline, mean (SD) 7.27 (2.98) 7.67 (2.48) 0.94 (0.42)
Adjusted Change†, mean (SE) 0.89 (0.30) −0.06 (0.30) p = 0.03*
6. How easy or hard would it be for you to make-up a vegetables dish with what you have on hand? Baseline, mean (SD) 7.55 (2.74) 6.99 (2.77) 0.90 (0.45)
Adjusted Change†, mean (SE) 0.80 (0.32) −0.10 (0.33) p = 0.048*
7. How easy or hard would it be for you to try vegetables that you have not eaten before? Baseline, mean (SD) 5.75 (3.32) 5.88 (3.14) 0.01 (0.53)
Adjusted Change†, mean (SE) 0.51 (0.37) 0.50 (0.38) P = 0.99
8. How easy or hard would it be for you to prepare and cook new recipes? Baseline, mean (SD) 7.24 (3.03) 6.70 (2.97) 0.39 (0.47)
Adjusted Change†, mean (SE) 0.86 (0.33) 0.46 (0.34) p = 0.40
Self-efficacy Sum Baseline, mean (SD) 55.03 (16.5) 55.17 (14.2) 4.09 (2.45)
Adjusted Change†, mean (SE) 6.40 (1.76) 2.30 (1.73) p = 0.10
  1. † Adjusted analyses control for site, baseline self-efficacy and education; *Statistically significant (p < 0.05)
  2. For self-efficacy sum N = 148 (intervention = 64 and control = 64); For intervention group: n = 73 for item 1, n = 74 for items 2, 6 and 8, n = 70 for items 3 and 4, n = 71 for items 5 and 7; For control group: n = 68 for items 1, 3, 4 and 5, n = 67 for items 2, 5, 7 and 8
  3. SD standard deviation, SE Standard error