Studies published during the years 2000–2010 and 2011–2019 had a clear trend of poor prognoses, which was less apparent in those published before 2000.
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The sentences
The nonlinear spline showed a decreasing trend.
Studies published during the years 2000–2010 and 2011–2019 had a clear trend of poor prognoses, which was less apparent in those published before 2000.
The nonlinear spline showed a decreasing trend.