Table 3 Participant demographic and baseline shopping characteristics
Study Arm | 1 | 2 | 3 | 4 | 5 | 6 | Overall |
|---|---|---|---|---|---|---|---|
N | 450 | 502 | 465 | 468 | 497 | 459 | 2841 |
Intervention Components | |||||||
Cash Back % | 10% | 10% | 10% | 25% | 10 + 15%NET | 10 + 15%NET | |
Weekly Text Message | None | Generic | Personalized | Personalized | Personalized | Personalized | |
Monthly Text Message | Standard | Standard | Standard | Standard | Standard | Unbundled | |
Characteristics | |||||||
Female (%)a | 47.1 | 44.8 | 47.3 | 44.2 | 49.3 | 46.2 | 46.5 |
Age, mean (SD) | 47.9 (11.8) | 48.3 (11.7) | 47.0 (11.6) | 47.4 (11.6) | 47.7 (11.9) | 48.5 (12.0) | 47.8 (11.8) |
Household Size, mean (SD) | 3.0 (1.3) | 2.9 (1.3) | 3.0 (1.2) | 3.0 (1.2) | 2.9 (1.2) | 2.9 (1.3) | 2.9 (1.2) |
Vitality membership, mean weeks (SD) | 110.5 (56.9) | 110.1 (56.2) | 111.7 (58.3) | 107.3 (55.6) | 112.2 (58.2) | 112.4 (57.8) | 110.7 (57.1) |
Region (%) | |||||||
Gauteng | 64.2 | 65.5 | 64.9 | 69.7 | 66.2 | 63.4 | 65.7 |
Kwazulu-Natal | 8.7 | 8.2 | 9.9 | 7.5 | 10.3 | 9.4 | 9.0 |
Western Cape | 19.1 | 20.3 | 16.3 | 15.4 | 16.7 | 18.5 | 17.7 |
Other | 8.0 | 6.0 | 8.8 | 7.5 | 6.8 | 8.7 | 7.6 |
Shopping trips/month, mean (SD) | 7.9 (4.4) | 7.9 (4.1) | 8.1 (4.0) | 7.7 (4.3) | 7.9 (4.1) | 8.3 (4.2) | 8.0 (4.2) |
Healthy Spending, mean Rand (SD) | 895.0 (548.9) | 923.4 (608.9) | 851.8 (511.9) | 843.5 (506.0) | 878.9 (540.5) | 906.1 (521.4) | 883.4 (541.9) |
Unhealthy Spending, mean (SD) | 558.3 (347.1) | 539.0 (302.2) | 549.0 (326.1) | 515.0 (303.6) | 532.0 (313.0) | 526.6 (332.4) | 536.5 (320.6) |
Neutral Spending, mean (SD) | 1823.5 (963.5) | 1760.5 (881.9) | 1818.8 (944.6) | 1727.3 (888.4) | 1736.5 (930.6) | 1786.6 (900.5) | 1774.6 (918.1) |
# Healthy Items, mean (SD) | 36.1 (21.2) | 37.5 (23.7) | 34.9 (20.5) | 34.8 (21.0) | 35.9 (21.6) | 37.1 (20.6) | 36.1 (21.5) |
# Unhealthy Items, mean (SD) | 26.4 (18.4) | 24.6 (14.9) | 25.2 (15.8) | 23.7 (15.1) | 24.2 (15.4) | 24.1 (16.4) | 24.7 (16.0) |
# Neutral Items, mean (SD) | 53.7 (28.8) | 51.8 (26.2) | 52.8 (27.0) | 50.2 (25.7) | 50.7 (26.1) | 52.2 (27.0) | 51.9 (26.8) |
% Healthy Spending, mean (SD) | 27.5 (10.4) | 28.3 (11.8) | 26.6 (9.7) | 27.7 (10.2) | 27.9 (10.5) | 28.5 (11.4) | 27.7 (10.7) |
% Unhealthy Spending, mean (SD) | 17.8 (7.6) | 17.7 (7.3) | 17.7 (7.6) | 17.3 (6.8) | 17.7 (7.5) | 16.9 (7.5) | 17.5 (7.4) |
% Healthy Items, mean (SD) | 31.4 (11.2) | 32.5 (12.7) | 30.8 (10.7) | 32.1 (11.3) | 32.2 (11.6) | 33.1 (12.8) | 32.0 (11.8) |
% Unhealthy Items, mean (SD) | 22.6 (9.5) | 22.1 (9.3) | 22.5 (9.4) | 21.9 (9.0) | 22.1 (9.2) | 21.1 (9.3) | 22.1 (9.3) |