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Table 2 Joinpoint analysis of trend of preeclampsia incidence in Taiwan between 2001 and 2014

From: Population-based trends and risk factors of early- and late-onset preeclampsia in Taiwan 2001–2014

  Standardised IR, per 1000 births AAPC Trend 1 Trend 2
2001 2014 Year AAPC (95%CI) Year AAPC (95%CI)
Trend of entire cohort 11.1 (10.5–11.6) 16.9 (16.4–17.5) 3.01 (1.50 to 4.54)* 2001–2012 1.25 (0.36 to 2.14)* 2012–2014 13.3 (2.55 to 25.1) *
by onset weeks
  < 34 weeks 4.68 (4.31–5.05) 8.34 (7.95–8.73) 3.67 (1.67 to 5.72)* 2001–2012 0.58 (− 0.63 to 1.80) 2012–2014 22.5 (7.50 to 39.6) *
  ≥ 34 weeks 6.56 (6.13–6.98) 8.86 (8.45–9.27) 2.21 (1.51 to 2.91)*       
  1. AAPC average annual percent change
  2. *P < 0.05