Table 3. Segments, joinpoints, and trends in C-section rates in Robson groups with the lowest expected values for C-sections in Brazil and its regions, 2014-2022.
| Robson groups | Brazil | |||||||
|---|---|---|---|---|---|---|---|---|
| Segment 1 | Segment 2 | |||||||
| Period | APC | 95%CI | Trend | Period | APC | 95%CI | Trend | |
| R1 | 2014-2016 | -4.08 * | -5.11; -2.37 | Decreasing | 2016-2022 | -0.17 | -0.53; 0.40 | Stationary |
| R2 | 2014-2016 | -0.01 | -0.83; 1.11 | Stationary | 2016-2022 | 1.21 * | 0.57; 2.16 | Increasing |
| R3 | 2014-2016 | -6.89 * | -8.80; -3.08 | Decreasing | 2016-2022 | 0.65 | -0.12; 2.27 | Stationary |
| R4 | 2014-2017 | 1.43 | -0.08; 2.84 | Stationary | 2017-2022 | 2.51 * | 1.07; 4.06 | Increasing |
| North | ||||||||
| Segment 1 | Segment 2 | |||||||
| Period | APC | 95%CI | Trend | Period | APC | 95%CI | Trend | |
| R1 | 2014-2016 | -4.86 * | -6.51; -1.64 | Decreasing | 2016-2022 | 1.57 * | 0.94; 2.85 | Increasing |
| R2 | 2014-2020 | 0.03 | -0.54; 0.33 | Stationary | 2020-2022 | 3.09 * | 1.45; 4.48 | Increasing |
| R3 | 2014-2016 | -8.01 * | -9.91; -5.26 | Decreasing | 2016-2022 | 3.97 * | 3.21; 4.82 | Increasing |
| R4 | 2014-2020 | 0.26 | -3.67; 1.74 | Stationary | 2020-2022 | 5.83 * | 1.10; 10.54 | Increasing |
| Northeast | ||||||||
| Segment 1 | Segment 2 | |||||||
| Period | APC | 95%CI | Trend | Period | APC | 95%CI | Trend | |
| R1 | 2014-2016 | -3.52 * | -5.00; -0.85 | Decreasing | 2016-2022 | 0.47 | -0.11; 2.14 | Stationary |
| R2 | No segment formed | |||||||
| R3 | 2014-2016 | -5.24 * | -6.95; -2.32 | Decreasing | 2016-2022 | 1.55 * | 0.93; 2.51 | Increasing |
| R4 | No segment formed | |||||||
| Southeast | ||||||||
| Segment 1 | Segment 2 | |||||||
| Period | APC | 95%CI | Trend | Period | APC | 95%CI | Trend | |
| R1 | 2014-2018 | -3.60 * | -5.45; -2.69 | Decreasing | 2018-2022 | -1.01 | -1.93; 0.93 | Stationary |
| R2 | No segment formed | |||||||
| R3 | 2014-2018 | -6.19 * | -11.30; -3.73 | Decreasing | 2018-2022 | -0.29 | -2.85; 5.55 | Stationary |
| R4 | 2014-2016 | 0.51 | -1.43; 3.41 | Stationary | 2016-2022 | 2.27 | -0.34; 4.62 | Stationary |
| South | ||||||||
| Segment 1 | Segment 2 | |||||||
| Period | APC | 95%CI | Trend | Period | APC | 95%CI | Trend | |
| R1 | 2014-2016 | -3.39 | -5.99; 0.15 | Stationary | 2016-2022 | 0.68 | -0.78; 3.50 | Stationary |
| R2 | 2014-2016 | -0.81 | -1.85; 0.66 | Stationary | 2016-2022 | 0.70 | -0.36; 2.02 | Stationary |
| R3 | 2014-2016 | -7.46 * | -12.10; -0.16 | Decreasing | 2016-2022 | 0.67 | -2.04; 7.38 | Stationary |
| R4 | 2014-2018 | -0.27 | -3.28; 2.53 | Stationary | 2018-2022 | 1.84 | -0.93; 5.06 | Stationary |
| Central-West | ||||||||
| Segment 1 | Segment 2 | |||||||
| Period | APC | 95%CI | Trend | Period | APC | 95%CI | Trend | |
| R1 | No segment formed | |||||||
| R2 | 2014-2020 | 2.13 * | 1.80; 2.91 | Increasing | 2020-2022 | -0.94 | -2.59; 0.81 | Stationary |
| R3 | 2014-2016 | -3.37 | -6.25; 0.83 | Stationary | 2016-2022 | -0.27 | -4.00; 3.43 | Stationary |
| R4 | 2014-2020 | 4.46 * | 3.73; 6.10 | Increasing | 2020-2022 | -1.82 | -4.54; 1.80 | Stationary |
95%CI: 95% confidence interval; APC: annual percentage change.
Source: prepared by the authors.
* Significant trend.