Table 6 Primary and secondary outcomes of studies applying short- and long- term interventions classified as monetary incentive alone

Herman (moderate)¹[33]

Intake in serves of healthy foods increased more at the intervention than at the control sites and the effect was sustained six months after the intervention.

Ni Mhurchi (strong) [22]

There was no difference in sales of saturated fat between intervention and control groups but purchase of healthier discounted foods was higher in the intervention group than in the control group and these effects were sustained 12 months after the intervention.

Waterlander (strong) [27]

Intake of fruit and vegetable increased in the intervention group compared to the control group.

Sturm² (strong) [26]

Participation in a rebate program for healthy foods led to increases in purchases of healthy foods and to decreases in purchases of less-desirable foods.