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Table 1 Characteristics of the participants at the baseline (n = 104)

From: A randomized controlled trial to investigate the impact of a low glycemic index (GI) diet on body mass index in obese adolescents

Characteristics Control (n = 52) Low GI (n = 52) p#
Sexψ    
 Female 28 (53.8%) 31 (59.6%) 0.553
 Male 24 (46.2%) 21 (40.4%)  
Age (years) 16.7 (1.0) 16.8 (1.0) 0.797
Body weight (kg) 82.9 (14.9) 87.6 (13.0) 0.090
Body height (m) 1.65 (0.09) 1.66 (0.08) 0.444
Body mass index (kg/m2) 30.2 (3.5) 31.6 (4.2) 0.068
Waist circumference (cm) 92.3 (9.8) 96.5 (10.9) 0.043
Systolic blood pressure (mmHg) 121.6 (10.2) 123.1 (9.7) 0.462
Diastolic blood pressure (mmHg) 72.4 (8.7) 74.0 (8.0) 0.326
Body fat (%) 36.8 (8.3) 39.8 (7.3) 0.051
Trunk fat (%) 40.5 (7.2) 42.9 (6.1) 0.071
Visceral fat (%) 12.5 (9.0 – 19.0) 14.2 (10.8 – 19.8) 0.367
Total cholesterol (mmol/L) 4.4 (0.7) 4.2 (0.7) 0.303
HDL-cholesterol (mmol/L) 1.3 (0.3) 1.2 (0.3) 0.674
LDL-cholesterol (mmol/L) 2.6 (0.7) 2.5 (0.6) 0.580
Non HDL-cholesterol (mmol/L) 3.1 (0.7) 3.0 (0.7) 0.416
Triglyceride (mmol/L) 1.1 (0.4) 1.0 (0.4) 0.236
Urine ACR (mg/mmol) 0.45 (0.26 – 0.84) 0.56 (0.33 – 1.32) 0.069
Fasting plasma glucose (mmol/L) 4.6 (0.3) 4.7 (0.3) 0.071
Two-hour FPG (mmol/L) 6.0 (1.3) 6.1 (1.2) 0.642
AUC glucose (102 mmol/L * min) 8.1 (1.3) 8.5 (1.3) 0.176
Diabetes statusψ    
 Normal 44 (84.6%) 46 (88.5%) 0.566
 Impaired glucose tolerance 8 (15.4%) 6 (11.5%)  
  1. Variables marked with ψ are presented as frequency (%), are presented as median (interquartile range), all others are presented as mean (standard deviation). HDL: high density lipoprotein cholesterol; LDL: low density lipoprotein cholesterol; ACR: albumin-to-creatinine ratio; AUC glucose: area under the curve of glucose levels across 2 hours of a standard oral glucose tolerance test.
  2. #Categorical and continuous variables were compared between the two groups using Pearson chi-square test and t-test respectively, those marked with were log-transformed before being tested by t-test.