Please select the arm or intervention descriptions that belong to the clinical trial below.
Title: A Randomized Controlled Trial to Investigate the Impact of a Low Glycemic Index (GI) Diet on Body Mass Index and Obesity Related Cardiovascular and Hormonal Factors in Chinese Adolescents
Brief Summary: Epidemiological studies suggest a role for a low glycemic index (GI) diet in the management of obesity and associated metabolic risks including diabetes. However, evidence from long-term, randomized controlled trials exploring the relationship between low GI diet, weight reduction and glycemia, particularly in children and adolescents, is lacking. Modern food-processing technology has produced many food products with high GI which may contribute to the burgeoning epidemic of obesity worldwide. Since dietary habits are shaped in early life, adolescence is a critical period to educate our young people to acquire a healthy eating habit to prevent obesity.

The investigators hypothesized that, in Chinese adolescents, low GI diet results in greater reduction in body mass index and body fat percentage, enhanced insulin sensitivity and favorable changes of cardiometabolic risk factors compared to conventional diet after 12 months of intervention.

This study is a randomized controlled trial of a low GI (\<55) versus conventional Chinese diet (GI\>/=70) in adolescents (12-month intervention followed by a 6-month observational period) to study; 1) the changes in body mass index and obesity associated changes in cardiometabolic profile; 2) the underlying hormonal factors associated with these changes.


Options:
A: Intervention Type: BEHAVIORAL; Name: Atkins diet (extremely low carbohydrate); Assigned to Arm(s): N/A | Intervention Type: BEHAVIORAL; Name: Zone diet (low carbohydrate, high protein); Assigned to Arm(s): N/A | Intervention Type: BEHAVIORAL; Name: Ornish diet (very low fat); Assigned to Arm(s): N/A
B: Arm Label: 1; Type: EXPERIMENTAL; Interventions: Behavioral: High carbohydrate and low glycemic index (GI) diet, Behavioral: Low carbohydrate and low GI diet, Behavioral: High carbohydrate and high GI diet, Behavioral: Low carbohydrate and high GI diet | Arm Label: 2; Type: EXPERIMENTAL; Interventions: Behavioral: High carbohydrate and low glycemic index (GI) diet, Behavioral: Low carbohydrate and low GI diet, Behavioral: High carbohydrate and high GI diet, Behavioral: Low carbohydrate and high GI diet | Arm Label: 3; Type: EXPERIMENTAL; Interventions: Behavioral: High carbohydrate and low glycemic index (GI) diet, Behavioral: Low carbohydrate and low GI diet, Behavioral: High carbohydrate and high GI diet, Behavioral: Low carbohydrate and high GI diet | Arm Label: 4; Type: EXPERIMENTAL; Interventions: Behavioral: High carbohydrate and low glycemic index (GI) diet, Behavioral: Low carbohydrate and low GI diet, Behavioral: High carbohydrate and high GI diet, Behavioral: Low carbohydrate and high GI diet | Arm Label: 5; Type: EXPERIMENTAL; Interventions: Behavioral: High carbohydrate and low glycemic index (GI) diet, Behavioral: Low carbohydrate and low GI diet, Behavioral: High carbohydrate and high GI diet, Behavioral: Low carbohydrate and high GI diet | Arm Label: 6; Type: EXPERIMENTAL; Interventions: Behavioral: High carbohydrate and low glycemic index (GI) diet, Behavioral: Low carbohydrate and low GI diet, Behavioral: High carbohydrate and high GI diet, Behavioral: Low carbohydrate and high GI diet | Arm Label: 7; Type: EXPERIMENTAL; Interventions: Behavioral: High carbohydrate and low glycemic index (GI) diet, Behavioral: Low carbohydrate and low GI diet, Behavioral: High carbohydrate and high GI diet, Behavioral: Low carbohydrate and high GI diet | Arm Label: 8; Type: EXPERIMENTAL; Interventions: Behavioral: High carbohydrate and low glycemic index (GI) diet, Behavioral: Low carbohydrate and low GI diet, Behavioral: High carbohydrate and high GI diet, Behavioral: Low carbohydrate and high GI diet | Intervention Type: BEHAVIORAL; Name: High carbohydrate and low glycemic index (GI) diet; Assigned to Arm(s): 1, 2, 3, 4, 5, 6, 7, 8 | Intervention Type: BEHAVIORAL; Name: Low carbohydrate and low GI diet; Assigned to Arm(s): 1, 2, 3, 4, 5, 6, 7, 8 | Intervention Type: BEHAVIORAL; Name: High carbohydrate and high GI diet; Assigned to Arm(s): 1, 2, 3, 4, 5, 6, 7, 8 | Intervention Type: BEHAVIORAL; Name: Low carbohydrate and high GI diet; Assigned to Arm(s): 1, 2, 3, 4, 5, 6, 7, 8
C: Intervention Type: BEHAVIORAL; Name: Low glycemic index diet; Assigned to Arm(s): N/A
D: Arm Label: LGI; Type: EXPERIMENTAL; Interventions: Dietary Supplement: Low glycemic index diet | Arm Label: HGI; Type: ACTIVE_COMPARATOR; Interventions: Dietary Supplement: High glycemic index diet | Arm Label: HB; Type: EXPERIMENTAL; Interventions: Other: Home-based exercise intervention | Arm Label: CONTROL; Type: ACTIVE_COMPARATOR; Interventions: Other: Non-exercisers | Intervention Type: DIETARY_SUPPLEMENT; Name: Low glycemic index diet; Assigned to Arm(s): LGI | Intervention Type: DIETARY_SUPPLEMENT; Name: High glycemic index diet; Assigned to Arm(s): HGI | Intervention Type: OTHER; Name: Home-based exercise intervention; Assigned to Arm(s): HB | Intervention Type: OTHER; Name: Non-exercisers; Assigned to Arm(s): CONTROL

Answer: C