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Night eating syndrome is associated with depression, low self-esteem, reduced daytime hunger, and less weight loss in obese outpatients.

OBJECTIVE: The objective of this study was to assess the relationship between the night eating syndrome (NES), measures of depression and self-esteem, test meal intake, and weight loss in obese participants. RESEARCH METHODS AND PROCEDURES: The study included 76 overweight (body mass index = 36.7 +/- 6.5 SD) outpatients (53 women and 23 men; aged 43.5 +/- 9.5 years) entering a weight loss program. They completed a Night Eating Questionnaire, the Zung Depression Inventory, and the Rosenberg Self-Esteem SCALE: Based on criteria by Stunkard et al. (Stunkard A, Berkowitz R, Wadden T, Tanrikut C, Reiss E, Young L. Binge eating disorder and the night eating syndrome. Int J Obes Relat Metab DISORD: 1996;20:1-6), participants had NES if they reported: (1) skipping breakfast > or =4 d/wk, interpreted as morning anorexia; (2) consuming more than 50% of total daily calories after 7 PM; and (3) difficulty falling asleep or staying asleep > or =4 d/wk. Eleven (14%) participants met the criteria for NES. After an 8-hour fast, all participants ingested a nutritionally complete liquid meal through a straw from a large opaque cooler until extremely full. They also completed ratings of hunger and fullness before and after this meal. RESULTS: Night eaters had higher depression (p = 0.04), lower self-esteem (p = 0.003), and less hunger (p = 0.005), and a trend for more fullness (p = 0.06) before the daytime test meal than the others. However, there were no significant differences in test-meal intake between groups. Nevertheless, test-meal intake was greater later in the day only for the night eaters (p = 0.01). Over a 1-month period, the night eaters lost less weight (4.4 +/- 3.2 kg) than the others (7.3 +/- 3.2 kg; p = 0.04), after controlling for body mass index. DISCUSSION: NES is a syndrome with distinct psychopathology and increased food intake later in the day, both of which may contribute to poorer weight loss outcome. NES criteria need to be better quantified and NES deserves consideration as a diagnostic eating disorder.

Effects of behavioral therapy on weight loss in overweight and obese patients with schizophrenia or schizoaffective disorder.

BACKGROUND: obesity is common in persons with schizophrenia. Besides its adverse health effects, obesity reduces quality of life and contributes to the social stigma of schizophrenia. METHOD: This 14-week, multicenter, open-label, rater-blinded, randomized study evaluated the effects of a group-based behavioral treatment (BT) for weight loss in overweight and obese stable patients with DSM-IV schizophrenia or schizoaffective disorder who had been switched from olanzapine to risperidone. Participants were randomly assigned to receive BT or usual clinical care (UC). BT included 20 sessions during which patients were taught to reduce caloric intake. In UC, patients were encouraged to lose weight but received no special advice about weight reduction. The primary outcome measure was change in body weight. RESULTS: Seventy-two patients were enrolled. The mean +/- SD weight loss at endpoint was significant in both groups (p < .05) and numerically greater in patients receiving BT than in those receiving UC (-2.0 +/- 3.79 and -1.1 +/- 3.11 kg, respectively). More patients in the BT group than in the UC group had lost > or = 5% of their body weight at endpoint (26.5% [9/34] and 10.8% [4/37], respectively; p = .082). A post hoc analysis of patients attending at least 1 BT session showed that significantly more patients in the BT than the UC group had lost > or = 5% of their body weight at endpoint (32.1% [9/28] vs. 10.8% [4/37], respectively, p = .038) and at week 14 (complete population; 40.9% [9/22] and 14.3% [4/28], respectively, p = .027). CONCLUSION: BT may be an effective method for weight reduction in patients with chronic psychotic illness.

Personality as a predictor of weight loss maintenance after surgery for morbid obesity.

OBJECTIVE: Personality characteristics are assumed to underlie health behaviors and, thus, a variety of health outcomes. Our aim was to examine prospectively whether personality traits predict short- and long-term weight loss after laparoscopic adjustable gastric banding. RESEARCH METHODS AND PROCEDURES: Of patients undergoing laparoscopic adjustable gastric banding, 168 (143 women, 25 men, 18 to 58 years old, mean 37 years, preoperative BMI 45.9 +/- 5.6 kg/m(2)) completed the Dutch Personality Questionnaire on average 1.5 years before the operation. The relationship between preoperative personality and short- and long-term postoperative weight loss was determined using multilevel regression analysis. RESULTS: The average weight loss of patients progressively increased to 10 BMI points until 18 months after surgery and stabilized thereafter. A lower baseline BMI, being a man, and a higher educational level were associated with a lower weight loss. None of the personality variables was associated with weight outcome at short-term follow-up. Six of seven personality variables did not predict long-term weight outcome. Egoism was associated with less weight loss in the long-term postoperative period. The effect sizes of the significant predictions were small. DISCUSSION: None of the personality variables predicted short-term weight outcome, and only one variable showed a small and unexpected association with long-term weight outcome that needs confirmation. This suggests that personality assessment as intake psychological screening is of little use for the prediction of a poor or successful weight outcome after bariatric surgery.

Do baseline serum leptin levels predict weight regain after dieting in obese women?

AIM: weight loss achieved during weight reduction programme is difficult to maintain. We investigated the possible role of circulating leptin in failure or success in maintaining weight loss. METHODS: Serum leptin levels were measured in 30 healthy premenopausal obese women before and after 12 weeks of dietary intervention and after 5 months of follow-up. RESULTS: After intervention body mass index (BMI) decreased from 30.6 to 25.4 kg/m2 (p < 0.01) and leptin levels decreased from 16.7 to 7.7 ng/ml (p < 0.01). After 5 months follow-up 12 women regained reduced weight and 18 women maintained weight loss. In the regainers leptin levels increased again, but remained low in the maintainers. Baseline leptin concentrations were lower in the regainers than in the maintainers (12.1 vs. 21.2 ng/ml, p = 0.04). During intervention leptin levels decreased three times more in the maintainers than in the regainers, although weight loss was similar in both groups. CONCLUSIONS: This study shows that obese women who regain weight after dieting have significantly lower baseline leptin levels than women who maintain weight loss. Our results suggest that differences in leptin resistance might exist in similarly obese women which could influence the success of dieting.

Body composition analysis and changes in airways function in obese adults after hypocaloric diet.

STUDY OBJECTIVES: To determine the relationship between weight-loss and pulmonary function indexes, focusing on forced expiratory flows (ie, FEV(1), forced expiratory flow at 50% of vital capacity [FEF(50)], forced expiratory flow at 75% of vital capacity, and forced expiratory flow at 25 to 75% of vital capacity [FEF(25--75)]). Specifically, to determine the effect of losses in total and segmental fat mass (FM) and of modifications in lean body mass, after restricted hypocaloric diet, on pulmonary function among obese adults. DESIGN: Cross-sectional, observational. SETTINGS: Human Physiology Division, Faculty of Medicine and Surgery, "Tor Vergata" University, Rome, Italy. PATIENTS: Thirty obese adults (mean [+/- SD] baseline body mass index [BMI], 32.25 +/- 3.99 kg/m(2)), without significant obstructive airway disease, were selected from among participants in a weight-loss program. MEASUREMENTS AND RESULTS: Anthropometric, body composition (BC), and respiratory parameters of all participants were measured before and after weight loss. Total and segmental lean body and FM were obtained by dual-energy x-ray absorptiometry. Dynamic spirometric tests and maximum voluntary ventilation (MVV) were performed. The BC parameters (ie, body weight [BW], BMI, the sum skinfold thicknesses, thoracic inhalation circumference, thoracic expiration circumference, total FM, and trunk FM [FMtrunk]) were significantly decreased (p < or = .0001) after a hypocaloric diet. The mean vital capacity, FEV(1), FEF(50), FEF(25-75), expiratory reserve volume, and MVV significantly increased (p < or = 0.05) with weight loss. The correlation coefficient for Delta FEF(25--75) (r = 0.20) was numerically higher than Delta FEF(50) and Delta FEV(1) (r = 0.14 and r = 0.08, respectively) for the BW loss. Moreover, the correlation coefficient for Delta FEF(25--75) (r = 0.45) was significantly higher (p < or = 0.02) than those for Delta FEF(50) and Delta FEV(1) (r = 0.38 and r = 0.15, respectively) for FMtrunk loss. CONCLUSIONS: This study shows that a decrease in total and upper body fat obtained by restricted diet was not accompanied by a decrease in ventilatory muscle mass. FMtrunk loss was found to have improved airflow limitation, which can be correlated to peripheral airways function.

Relationship between cholesteryl ester transfer protein and atherogenic lipoprotein profile in morbidly obese women.

OBJECTIVE: obesity is associated with increased morbidity and mortality from atherosclerotic disease. Lipid abnormalities contribute to the increased relative risk in obese subjects. Cholesteryl ester transfer protein (CETP) mass is increased in these patients and might mediate the atherogenic lipoprotein pattern observed in obesity. METHODS AND RESULTS: Twenty-one morbidly obese, middle-aged, female subjects participated in this prospective study. Subjects were examined before and 1 year after surgical treatment. Fat mass was determined by body impedance analysis; CETP mass, by ELISA; CETP activity, by exogenous substrate assay; and LDL particle diameter, by gradient gel electrophoresis. Mean weight loss after 1 year was 28.7 kg; mean fat mass loss was 22.6 kg. Mean CETP mass decreased from 1.81 to 1.32 microg/mL (P=0.008); mean CETP activity decreased from 244 to 184 nmol x mL(-1) x h(-1) (P=0.004); and in parallel, the mean diameter of LDL particles increased (256.8 to 258.4 A, P=0.04). CONCLUSIONS: We conclude that weight loss is associated with a pronounced decrease in CETP mass and activity and a consistent increase in LDL particle diameter. After 1 year of this prospective study in morbidly obese subjects undergoing weight loss by surgical treatment, it has been determined that some features of the atherogenic lipoprotein profile can be reversed.

Restoration of adiponectin pulsatility in severely obese subjects after weight loss.

Diurnal variations of adiponectin levels have been studied in normal-weight men and in diabetic and nondiabetic obese subjects, but no data have been reported in obese subjects after weight loss. We collected blood samples at 1-h intervals over 24 h from seven severely obese subjects before and after massive weight loss consequent to surgical operation (bilio-pancreatic diversion [BPD]) to measure adiponectin, insulin, glucose, and cortisol levels. Insulin sensitivity was assessed by euglycemic-hyperinsulinemic clamp (M value). Studies of diurnal variations and pulsatility of adiponectin, insulin, and cortisol were performed. The pulsatility index (PI) of adiponectin increased after BPD from 0.04 to 0.11 microg/min (P = 0.01). Insulin PI significantly increased after the operation (1.50 vs. 1.08 pmol.l(-1).min(-1), P = 0.01), while cortisol PI did not significantly change. The adiponectin clearance rate changed from 0.001 +/- 10(-4).min(-1) before BPD to 0.004 +/- 8. 10(-4).min(-1) after BPD (P = 0.03). Insulin clearance increased from 0.006 +/- 6. 10(-4).min(-1) before BPD to 0.009 +/- 4.10(-4). min(-1) after BPD (P = 0.02). The M value doubled after surgery (27.08 +/- 8.5 vs. 53.34 +/- 9.3 micromol.kg(FFM)(-1).min(-1); P < 0.001) becoming similar to the values currently reported for normal-weight subjects. In conclusion, in formerly severely obese subjects, weight loss paired with the reversibility of insulin resistance restores homeostatic control of the adiponectin secretion, contributing to the reduction of cardiovascular risk already described in these patients.

Weight reduction, fertility and contraception.

PIP: The significance of weight and body composition with regard to the fertile menstrual cycle has excited much interest. There is global imbalance of resources and problems of widespread chronic malnutrition in many 3rd world countries. This emphasizes the great importance of the possible effects of diet, body weight, and body composition on fecundity (ability to reproduce), fertility (reproductive performance), and pregnancy outcome. Frisch and Revelle suggested that a critical body weight is required for a girl to progress through puberty, menstruate, and finally develop ovulatory cycles. They postulated a direct relationship between weight and menarche and suggested that before menarche will occur at least 17% of the body weight needs to be made up of fat. The Frisch hypothesis is not universally accepted, and it seems highly unlikely that a single age unrelated body weight is always the trigger for menarche. Many of the data used in Frische's original studies were derived rather than directly observed. It seems likely that both body weight and composition are important and that the peripheral conversion of androgens to estrogens in fat plays a role in pubertal development, but the actual signal whcih triggers the hypothalamic events leading eventually through puberty to menstruation and ovulation remains unkown. Acute malnutrition, as seen during famine, is assoicated with a dramatic decrease in fertility. It is usually secondary to amenorrhea and annovulation. In developing countries weight related amenorrhea and delayed menarche are largely the result of nutritonal deprivation and the demands of lactation on women of boderline body weight, but a different pattern is seen in Western countries. The outstanding example of weight reduction resulting in infertility is seen in patients with anorexia nervosa. These women have extreme self imposed weight loss, a distorted perception of their body image, and disturbance in their attitude towards their feelings of hunger and satiety. Self imposed weight loss is the most common single cause of secondary amenorrhea seen in the Western world. While diagnosis of the gross anoretic is perhaps rarely missed, the more subtle degrees of weight loss and their effect on the menstrual cycle are often overlooked. Simple weight loss of more than 30% of body fat will cause menstrual dysfunction and ultimately amenorrhea. There is no clearly defined threshold between infertility and normal reproductive health, and there will always be women who become pregnant despite suboptimal weight. Patients with simple weight loss may be sufficiently motivated to restore their weight to normal levels, with resultant spontaneous resumption of ovulation.

 

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