Portal de Periódicos da CAPES

Adding cognitive behavioural treatment to either low-carbohydrate or low-fat diets: differential short-term effects

2009; Cambridge University Press; Volume: 102; Issue: 12 Linguagem: Inglês

10.1017/s0007114509991231

1475-2662

Heriberto Rodríguez-Hernández, Uziel A. Morales-Amaya, Ramon Rosales-Valdéz, Felipe Rivera-Hinojosa, Martha Rodrı́guez-Morán, Fernando Guerrero‐Romero,

Obesity and Health Practices

To evaluate the efficacy of adding cognitive behavioural treatment (CBT) to either a low-carbohydrate (LC) diet or a low-fat (LF) diet in the treatment of weight loss of obese women, a randomised clinical intervention study was performed. A total of 105 healthy non-pregnant obese women (average age and BMI of 45·4 ( sd 10·4) years and 36 ( sd 4·3) kg/m 2 ) were randomly allocated to the CBT or control (C) groups; within each group, women were randomly selected to receive either the LC or LF diet during 6 months. The pre-planned primary trial end-point was the weight loss. Differences between the groups were assessed using one-way ANOVA. There were three women (2·8 %) who dropped out, all of them in the CBT group. No differences in the anthropometric and laboratory characteristics at baseline were noted between women in the CBT ( n 52) and control groups ( n 50). Intention-to-treat analysis showed that weight loss in the CBT-LC (90 ( sd 12·3) to 82·1 ( sd 12·1) kg) and C-LC (89·4 ( sd 10·0) to 85·8 ( sd 9·8) kg) groups reached 8·7 and 4·0 %, respectively ( P < 0·0001), and in the CBT-LF (87·9 ( sd 11·4) to 79·4 ( sd 11·8) kg) and C-LF (88·8 ( sd 14·5) to 85·3 ( sd 14·3) kg) groups it was 9·7 and 3·9 %, respectively ( P < 0·05). Weight loss was higher in the CBT-LF group than in the CBT-LC groups ( P = 0·049). The present results showed that adding CBT to either the LF or LC diet produced significantly greater short-term weight loss in obese women compared with diet alone. These finding support the efficacy of CBT in breaking previous dietary patterns and in developing healthier attitudes that reinforce a healthier lifestyle.