Table 3.
Trends of maternal age groups in pregnant women using joinpoint regression analysis from 2011 to 2019
| Variables and segments | Year | APC (95% CI) |
|---|---|---|
| < 30 years | ||
| Trend1 | 2011–2014 | 0.2 (−36.2, 57.5) |
| Trend2 | 2014–2017 | −8.2 (− 62.8, 126.4) |
| Trend3 | 2017–2019 | −6.6 (− 62.1, 130.3) |
| AAPC (95% CI) | 2011–2019 | −4.7 (−11.0, 2.0) |
| 30–34 years | ||
| Trend1 | 2011–2014 | −1.0 (−22.2, 25.9) |
| Trend2 | 2014–2017 | 5.3 (−34.9, 70.3) |
| Trend3 | 2017–2019 | 7.4 (−33.6, 73.7) |
| AAPC (95% CI) | 2011–2019 | 3.4 (−0.3, 7.2) |
| ≥35 years (AMA) | ||
| Trend1 | 2011–2014 | 0.4 (− 69.9, 34.5) |
| Trend2 | 2014–2017 | 21.4 (− 89.1, 248.5) |
| Trend3 | 2017–2019 | −0.8 (−91.1102.0) |
| AAPC (95% CI) | 2011–2019 | 7.5 (−10.3, 28.9) |
APC Annual percentage change, AAPC Average annual percent change, CI Confidence interval