- The generalized estimating equations models, the parameters estimation, p-values and relative risks used in the study.
| Variables | b±SE | P-values | Relative risks |
|---|---|---|---|
| Y=counts of FBDOs, model 1 | |||
| Intercept | 2.858±0.258 | <0.0001† | 17.427 |
| Ref=public | - | - | - |
| Source=home | -0.29±0.23 | 0.207 | 0.749 |
| Ref=2017 | - | - | - |
| Year=2018 | -0.061±0.085 | 0.473 | 0.941 |
| Year=2019 | -0.33±0.1 | 0.0009† | 0.719 |
| Year=2020 | -1.083±0.137 | <0.0001† | 0.339 |
| Year=2021 | -0.776±0.202 | 0.0001† | 0.461 |
| Year=2022 | -0.836±0.112 | <0.0001† | 0.434 |
| Year=2023 | -0.315±0.249 | 0.206 | 0.73 |
| Y=counts of FBDOs cases, model 2 | |||
| Intercept | 5.181±0.294 | <0.0001† | 177.772 |
| Ref=public | - | - | - |
| Source=home | -0.901±0.172 | <0.0001† | 0.407 |
| Ref=2017 | - | - | - |
| Year=2018 | -0.236±0.142 | 0.0966* | 0.791 |
| Year=2019 | -0.46±0.18 | 0.0104** | 0.632 |
| Year=2020 | -1.034±0.278 | 0.0002† | 0.356 |
| Year=2021 | -1.036±0.276 | 0.0002† | 0.356 |
| Year=2022 | -1.095±0.22 | <0.0001† | 0.335 |
| Year=2023 | -0.592±0.228 | 0.0093† | 0.554 |
| Y=Counts of FBDOs cases based on gender, model 3 | |||
| Intercept | 4.832±0.303 | <0.0001† | 125.349 |
| Ref=male | - | - | - |
| Gender=female | -0.07±0.05 | 0.1615 | 0.933 |
| Ref=2017 | - | - | - |
| Year=2018 | -0.364±0.175 | 0.0374** | 0.696 |
| Year=2019 | -0.5±0.253 | 0.0482** | 0.607 |
| Year=2020 | -0.913±0.367 | 0.0128** | 0.402 |
| Year=2021 | -1.019±0.367 | 0.0055** | 0.362 |
| Year=2022 | -0.976±0.273 | 0.0003† | 0.377 |
| Year=2023 | -0.513±0.261 | 0.0491** | 0.6 |
| Y=counts of FBDOs cases based on nationality, model 4 | |||
| Intercept | 4.124±0.539 | <0.0001† | 61.788 |
| Ref=non-SA | - | - | - |
| Nationality=SA | 1.214±0.315 | 0.0001† | 3.366 |
| Ref=2017 | - | - | - |
| Year=2018 | -0.429±0.182 | 0.0181** | 0.652 |
| Year=2019 | -0.6±0.252 | 0.0172** | 0.549 |
| Year=2020 | -1.146±0.425 | 0.0069** | 0.318 |
| Year=2021 | -1.24±0.448 | 0.0056** | 0.29 |
| Year=2022 | -1.037±0.272 | 0.0001† | 0.355 |
| Year=2023 | -0.545±0.186 | 0.0033† | 0.58 |
| Y=counts of FBDOs cases based on age (years), model 5 | |||
| Intercept | 0.065±0.238 | 0.7871 | 1DF.067 |
| Ref= age <1 | - | - | - |
| Age=1-4 | 3.014±0.113 | <0.0001† | 20.369 |
| Age=5-19 | 4.591±0.115 | <0.0001† | 98.515 |
| Age=20-49 | 4.68±0.157 | <0.0001† | 107.749 |
| Age=50+ | 2.598±0.437 | <0.0001† | 13.433 |
| Ref=2017 | - | - | - |
| Year=2018 | -0.202±0.155 | 0.1929 | 0.818 |
| Year=2019 | -0.649±0.28 | 0.0204** | 0.523 |
| Year=2020 | -1.089±0.339 | 0.0013† | 0.337 |
| Year=2021 | -0.98±0.36 | 0.0065† | 0.376 |
| Year=2022 | -1.022±0.214 | <0.0001† | 0.36 |
| Year=2023 | -0.544±0.228 | 0.0169** | 0.581 |