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Comparative Study
. 2011 Jul 10:11:547.
doi: 10.1186/1471-2458-11-547.

Mental health impairment in underweight women: do body dissatisfaction and eating-disordered behavior play a role?

Jonathan Mond  1 , Bryan Rodgers, Phillipa Hay, Cathy Owen
Affiliations
Comparative Study

Mental health impairment in underweight women: do body dissatisfaction and eating-disordered behavior play a role?

Jonathan Mond et al. BMC Public Health. .

Abstract

Background: We sought to evaluate the hypothesis that mental health impairment in underweight women, where this occurs, is due to an association between low body weight and elevated levels of body dissatisfaction and/or eating-disordered behaviour.

Methods: Subgroups of underweight and normal-weight women recruited from a large, general population sample were compared on measures of body dissatisfaction, eating-disordered behaviour and mental health.

Results: Underweight women had significantly greater impairment in mental health than normal-weight women, even after controlling for between-group differences in demographic characteristics and physical health. However, there was no evidence that higher levels of body dissatisfaction or eating-disordered behaviour accounted for this difference. Rather, underweight women had significantly lower levels of body dissatisfaction and eating-disordered behaviour than normal-weight women.

Conclusions: The findings suggest that mental health impairment in underweight women, where this occurs, is unlikely to be due to higher levels of body dissatisfaction or eating-disordered behaviour. Rather, lower levels of body dissatisfaction and eating-disordered behaviour among underweight women may counterbalance, to some extent, impairment due to other factors.

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Figures

Figure 1
Figure 1
Loess curve showing the association between body mass index (BMI) (kg/m2) and mental health functioning, as measured by the Medical Outcomes Study Short Form Mental Component Summary Scale (SF-12 MCS), in the total sample (n = 4,892) (Note: lower scores on the SF-12 MCS indicate greater mental health impairment).
Figure 2
Figure 2
Loess curve showing the association between body mass index (BMI) (kg/m2) and subjective mental health, as measured by the WHOQOL-BREF Psychological Health subscale (QOL-P), in the total sample (n = 4,892) (Note: lower scores on the QOL-P indicate greater mental health impairment).
Figure 3
Figure 3
Loess curve showing the association between body mass index (BMI) (kg/m2) and general psychological distress, as measured by the Kessler Psychological Distress Scale (K-10) in the total sample (n = 4,892) (Note: lower scores on the K-10 indicate greater mental health impairment).
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