Table 6. Age- and gender-specific linear trends in BMI, waist circumference, prevalence of alcohol users and smokers in the South African adult population (aged 15 years and over), between 2008 and 2014–15.
Estimates and 95% confidence intervals.
| Age category [years] | BMI [kg/m2 per year] |
Waist circ. [cm per year] |
Prevalence of alcohol users [% per year] |
Prevalence of smokers [% per year] |
|---|---|---|---|---|
| Females | ||||
| 15–24 | 0.00 (-0.05;0.06) | 0.47 (0.26;0.68) | 0.59 (0.12;1.07) | -0.01 (-0.31;0.29) |
| 24–34 | 0.15 (0.06;0.23) | 0.94 (0.69;1.20) | 1.87 (1.24;2.49) | -0.35 (-0.77;0.07) |
| 35–44 | 0.11 (-0.01;0.23) | 0.95 (0.64;1.26) | 0.66 (-0.15;1.47) | -0.39 (-1.00;0.23) |
| 45–54 | 0.12 (0.00;0.25) | 0.92 (0.55;1.29) | 0.44 (-0.2;1.07) | 0.39 (-0.43;1.21) |
| 55–64 | 0.17 (0.02;0.33) | 1.11 (0.65;1.58) | -0.34 (-1.17;0.48) | -0.11 (-0.70;0.49) |
| 65+ | -0.05 (-0.17;0.07) | 0.93 (0.56;1.31) | -0.23 (-0.99;0.53) | -0.60 (-1.16;-0.05) |
| 15+ | 0.10 (0.06;0.14) | 0.88 (0.7;1.06) | 0.73 (0.39;1.08) | -0.16 (-0.38;0.06) |
| Males | ||||
| 15–24 | -0.07 (-0.12;-0.01) | 0.35 (0.17;0.52) | 1.06 (0.49;1.63) | -0.10 (-0.66;0.47) |
| 24–34 | -0.02 (-0.11;0.06) | 0.64 (0.24;1.05) | 2.02 (1.15;2.88) | 0.20 (-0.6;0.99) |
| 35–44 | -0.05 (-0.16;0.06) | 0.47 (0.16;0.79) | 0.22 (-0.72;1.16) | -0.96 (-1.84;-0.08) |
| 45–54 | -0.03 (-0.15;0.09) | 0.72 (0.36;1.08) | 1.24 (0.16;2.31) | -0.42 (-1.54;0.69) |
| 55–64 | 0.00 (-0.19;0.20) | 1.14 (0.57;1.70) | -0.46 (-1.68;0.76) | 0.14 (-1.08;1.36) |
| 65+ | 0.12 (-0.06;0.30) | 1.22 (0.71;1.73) | -0.59 (-2.16;0.98) | -0.22 (-1.46;1.02) |
| 15+ | -0.01 (-0.06;0.03) | 0.67 (0.48;0.86) | 1.06 (0.67;1.45) | -0.11 (-0.45;0.24) |
Confidence intervals in brackets.