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Table 2 Prevalence of adiposity and cardio-metabolic comorbidities by gender, population group and overall

From: Differential prevalence and associations of overweight and obesity by gender and population group among school learners in South Africa: a cross-sectional study

Variables, n (%) Overall Gender Population groups P for population group* gender*
Boys Girls P-value Coloured Black White P-value
N, % 1559 (100) 619 (39.7) 940 (60.3)   877 (56.3) 537 (34.5) 145 (9.3)   
Body Mass Index categories     <0.0001     <0.0001 <0.0001
 Normal weight 1202 (77.1) 533 (86.1) 669 (71.2)   699 (79.7) 398 (74.1) 105 (72.4)   
 Overweight 243 (15.6) 58 (9.4) 185 (19.7)   112 (12.8) 101 (18.8) 30 (20.7)   
 Obesity 114 (7.3) 28 (4.5) 86 (9.1)   66 (7.5) 38 (7.1) 10 (6.9)   
 Hypertension 38 (2.6) 17 (2.9) 21 (2.4) 0.748 17 (2.0) 18 (3.6) 3 (2.2) 0.038 0.072
Dyslipidaemia
 Triglycerides >1.5 mmol/L 78 (5.0) 26 (4.2) 52 (5.5) 0.238 42 (4.8) 29 (5.4) 7 (4.8) 0.873 0.040
 Total cholesterol >5 mmol/L 102 (6.5) 28 (4.5) 74 (7.9) 0.009 61 (7.0) 27 (5.0) 14 (9.7) 0.102 0.034
 HDL-C < 1.2 mmol/L 1047 (67.2) 459 (74.2) 588 (62.6) <0.0001 593 (67.6) 339 (63.1) 115 (79.3) 0.001 <0.0001
  1. *P-value for the interaction of population group and gender; Overweight and obesity: Gender- and age-specific BMI cut-off points corresponding to 25 and 30 kg/m2, respectively, at the age of 18 years (17); Hypertension: systolic and/or diastolic blood pressure equal to the 95th percentile for gender, age and height (16)