Table 2a.
Summary of studies included in a review of field experiments on the effectiveness of subsidies in promoting healthy food purchases and consumption: intervention country, intervention duration, follow-up duration, study design, eligible item and intervention environment
| Study ID | Reference | Intervention country | Intervention duration (weeks) | Follow-up duration (weeks) | Study design | Economic incentive | Eligible item | Intervention environment |
|---|---|---|---|---|---|---|---|---|
| 1 | Jeffery et al. (1994)( 69 ) | USA | 3 | 3 | Pre–post | Price discount | Fruits, salad | University cafeteria |
| 2 | Paine-Andrews et al. (1996)( 70 ) | USA | 9·5 h | 0 | Pre–post | Price discount | Low-fat milk, low-fat salad dressings, low-fat frozen desserts | Supermarket |
| 3 | French et al. (1997)( 71 ) | USA | 4 | 3 | Pre–post | Price discount | Low-fat snacks | University |
| 4 | French et al. (1997)( 72 ) | USA | 3 | 3 | Pre–post | Price discount | Fruits, carrot, salad | High-school cafeteria |
| 5 | Kristal et al. (1997)( 73 ) | USA | 32 | 0 | RCT | Voucher | Fruits/vegetables | Supermarket |
| 6 | Anderson et al. (2001)( 74 ) | USA | 8 | 0 | Cohort | Voucher | Fruits/vegetables | Farmers’ market |
| 7 | French et al. (2001)( 75 ) | USA | 48 | 0 | RCT | Price discount | Low-fat snacks | Secondary school, worksite |
| 8 | Bamberg (2002)( 76 ) | Germany | 1 | 0 | RCT | Voucher | Organic fruits/vegetables | Organic food store |
| 9 | Hannan et al. (2002)( 77 ) | USA | 31 | 0 | Pre–post | Price discount | Fresh fruits, low-fat cookies, low-fat cereal bars, low-fat chips | High-school cafeteria |
| 10 | Horgen and Brownell (2002)( 78 ) | USA | 16 | 0 | Pre–post | Price discount | Low-fat chicken sandwich, low-fat salad, vegetable soup | Restaurant |
| 11 | Herman et al. (2006)( 79 ); Herman et al. (2008)( 80 ) | USA | 24 | 24 | Cohort | Voucher | Fresh fruits/vegetables | Supermarket, farmers’ market |
| 12 | Burr et al. (2007)( 81 ) | UK | 32 | 0 | RCT | Voucher | 100 % orange juice | Home |
| 13 | Michels et al. (2008)( 82 ) | USA | 5 | 5 | Pre–post | Price discount | Healthier foods | University cafeteria |
| 14 | Brown and Tammineni (2009)( 83 ) | USA | 40 | 0 | Pre–post | Price discount | Healthier beverages | Middle/high school |
| 15 | Bihan et al. (2010)( 84 ); Bihan et al. (2012)( 85 ) | France | 48 | 0 | RCT | Voucher | Fresh fruits/vegetables | Supermarket |
| 16 | French et al. (2010)( 86 ); French et al. (2010)( 87 ) | USA | 72 | 0 | RCT | Price discount | Healthier foods and drinks | Worksite |
| 17 | Lowe et al. (2010)( 88 ) | USA | 12 | 36 | RCT | Price discount | Low-calorie foods | Hospital cafeteria |
| 18 | Ni Mhurchu et al. (2010)( 89 ); Blakely et al. (2011)( 90 ) | New Zealand | 24 | 24 | RCT | Price discount | Healthier foods | Supermarket |
| 19 | Kocken et al. (2012)( 91 ) | Netherlands | 18 | 0 | RCT | Price discount | Low-calorie foods and drinks | High school |
| 20 | An et al. (2013)( 92 ) | South Africa | 132 | 0 | Cohort | Price discount | Healthier foods | Supermarket |
RCT, randomized controlled trial.