Table 3.
Ethnic/racial Differences in self-reported Maximum Weight Lost (lbs.) During Treatment
| Overall Sample (n=400) |
Non- Hispanic Black (n=99) |
Hispanic (n=38) |
Non-Hispanic White (n=263) |
Effect Size |
|
|---|---|---|---|---|---|
| Self-help diets | |||||
| Mean (SD) | 23.9 (23.0) | 19.4 (22.0) | 22.9 (22.0) | 25.5 (23.4)a | ηp2 = .04 |
| Median (25th-75th percentile) | 15.0 (10.0-32.0) | 10.0 (5.0-26.5) | 15.0 (4.3-39.5) | 20.0 (10.0-35.0) | |
| Fad/crash diets | |||||
| Mean (SD) | 14.6 (15.2) | 14.0 (14.9) | 16.8 (19.1) | 14.6 (14.8) | ηp2 = .00 |
| Median (25th-75th percentile) | 10.0 (5.0-20.0) | 10.0 (4.0-20.0) | 8 (4.5-33.0) | 10.0 (5.0-16.3) | |
| Supervised diets | |||||
| Mean (SD) | 32.6 (26.2) | 28.0 (28.2) | 20.5 (25.0) | 34.4 (25.7)a,b | ηp2 = .04 |
| Median (25th-75th percentile) | 30.0 (12.5-43.5) | 19.0 (9.3-41.3) | 13.0 (8.0-28.0) | 30.0 (15.0-45.0) | |
| Prescribed medications | |||||
| Mean (SD) | 24.3 (21.3) | 23.4 (25.4) | 29.4 (40.0) | 24.1 (18.1) | ηp2 = .02 |
| Median (25th-75th percentile) | 20.0 (10.0-32.5) | 17.5 (0.0-37.5) | 15.0 (6.0-60.0) | 20.0 (10.0-32.8) | |
| Nutritionist-led | |||||
| Mean (SD) | 20.3 (25.9) | 11.1 (13.0) | 22.8 (19.5) | 22.8 (29.2) | ηp2 = .02 |
| Median (25th-75th percentile) | 12.0 (0.0-28.0) | 7.5 (0.0-19.3) | 21.5 (4.8-35.3) | 15.0 (0.0-31.5) | |
| Mental health professionals | |||||
| Mean (SD) | 17.3 (15.8) | 20.0 (15.0) | 5.0 (7.1) | 17.9 (16.2) | ηp2 = .07 |
| Median (25th-75th percentile) | 12.0 (5.0-30.0) | 20.0 (5.0-20.0)* | 5.0 (0.0-5.0)* | 13.5 (5.3-30.0) | |
| OTC medications | |||||
| Mean (SD) | 13.8 (17.5) | 14.5 (16.1) | 4.9 (4.3) | 14.3 (18.5) | ηp2 = .01 |
| Median (25th-75th percentile) | 9.0 (0.0-20.0) | 10.0 (3.8-20.0) | 3.0 (1.0-10.0) | 5.0 (0.0-20.0) |
Note: All analyses adjusted for age and sex; weight loss indicates self-reported Maximum Weight Lost during treatment; non-transformed weight loss is shown; effect sizes are based on log transformed data
*
represents 25th-50th percentile
a
represents significantly different from non-Hispanic Black
b
represents significantly different from Hispanic; OTC = over the counter; suggested norms for partial eta-squared: small = 0.01; medium = 0.06; large = 0.14 (Cohen, 1988).