Skip to main content

Table 1 Socio-demographic and behavioural characteristics of participants presented 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

Characteristics Overall Gender Population groups P for population group* gender*
Male Female P-value Coloured Black White P-value
Number, n (%) 1559 (100) 619 (39.7) 940 (60.3)   877 (56.3) 537 (34.5) 145 (9.3)   
Mean age, years (SD) 12.9 ± 2.5 13.0 ± 2.6 12.8 ± 2.5 0.226 12.7 ± 2.6 12.9 ± 2.5 14.0 ± 2.0 <0.0001 0.001
Age group (years), n (%)     0.165     <0.0001 <0.0001
 7–9 185 (11.9) 77 (12.4) 108 (11.5)   127 (14.5) 51 (9.5) 7 (4.8)   
 10–12 483 (31.0) 172 (27.8) 311 (33.1)   285 (32.5) 183 (34.1) 15 (10.3)   
 13–15 626 (40.1) 257 (41.5) 369 (39.2)   317 (36.1) 209 (38.9) 100 (69.0)   
 16–18 265 (17.0) 113 (18.3) 152 (16.2)   148 (16.9) 94 (17.5) 23 (15.9)   
Location, n (%)     0.043     <0.0001 <0.0001
 Rural 142 (9.5) 44 (7.4) 98 (10.9)   138 (16.7) 4 (0.7) -   
 Semi-urban 448 (29.9) 197 (33.1) 251 (27.8)   249 (30.1) 199 (37.8) -   
 Urban 908 (60.6) 355 (59.5) 553 (61.3)   441 (53.2) 324 (61.5) 143 (100)   
Behavioural risk factors, n (%)
Physical inactivity**, 423 (27.1) 159 (25.7) 264 (28.1) 0.297 252 (28.7) 119 (22.2) 52 (35.9) 0.001 0.003
Sedentary behaviour***, 1303 (83.6) 507 (81.9) 796 (84.7) 0.004 709 (80.8) 469 (87.3) 125 (86.2) 0.148 0.007
Smoking 122 (7.9) 71 (11.5) 51 (5.4) <0.0001 85 (9.9) 16 (3.0) 21 (14.5) <0.0001 <0.0001
Alcohol consumption 223 (14.4) 111 (17.9) 112 (11.9) 0.001 128 (14.7) 51 (9.6) 44 (30.3) <0.0001 <0.0001
Dietary Diversity Score ≤ 4 667 (43.8) 269 (44.6) 398 (43.3) 0.616 371 (43.7) 273 (51.6) 23 (16.0) <0.0001 <0.0001
  1. 21 missing (10 males; 11 females); (15 Coloured; 6 Black learners)
  2. *P-value for the interaction of population group and gender; **participating in sport and/or walking on ≤2 days/week; ***television watching 3–5 days/week