TABLE 7-1 Predictors of Weight Loss
High initial body weight or body mass index
High resting metabolic rate or resting energy expenditure
High perceived self-efficacy
Attendance at program
Experiencing weight loss early in program
Increased length of treatment
Having social support
Engaging in physical activity
Incorporation of behavior modification techniques
Slowing rate of eating
Repeated attempts at weight loss
Experiencing perceived stress
(Others include the opposites of the positive indicators)
Total body fat, fat distribution, and body composition
Personality/psychopathology test results
NOTE: With the exception of resting metabolic rate, the absence of metabolic and physiological factors as predictors of weight loss is not an oversight. The measurement of metabolic factors is beyond the practice of the vast majority of obesity-treatment programs, and it is not surprising that data are not available. It is likely that with additional research, some factors can be identified. For example, although adipose tissue lipoprotein lipase (LPL) activity is increased in obesity, there are no studies identifying LPL activity as a predictor of weight loss. Future studies are needed to identify metabolic and physiologic predictors of weight loss (see Chapter 10 ).
SOURCES: Brownell and Wadden, 1992; Foreyt and Goodrick, 1991, 1994; O'Neil and Jarrell, 1992; Perri et al., 1992; and Wadden and Letizia, 1992.
weight management has been found to predict greater weight loss (Oettingen and Wadden, 1991). Assessing self-efficacy before weight-loss treatment begins and applying cognitive-behavioral methods to increase low levels may increase overall response to treatment.
Further research is needed to determine how apparent self-regulatory