<div dir="ltr"><div style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><font color="#444444" face="Arial, Helvetica, sans-serif">I have some questions regarding the meta-regression analysis. I have the database on the proportion (Below bubble plot). My advisor asked me to do the polynomial regression. I have two questions:</font></div><div style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><font color="#444444" face="Arial, Helvetica, sans-serif"><br></font></div><div style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><font color="#444444" face="Arial, Helvetica, sans-serif"><div style="color:rgb(34,34,34);font-family:arial,sans-serif;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><font color="#444444" face="Arial, Helvetica, sans-serif">1- Is it any polynomial regression pattern in this data?</font></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><font color="#444444" face="Arial, Helvetica, sans-serif">2- I wrote below code but I couldn't get the line, Could you help me?</font></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><font color="#444444" face="Arial, Helvetica, sans-serif">----------------</font></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><font color="#444444" face="Arial, Helvetica, sans-serif"><span style="color:rgb(34,34,34);font-family:arial,sans-serif;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">res<-rma(yi=y, vi=s2, data=data, method="DL",mods = ~ poly(year, degree=2))</span><div style="color:rgb(34,34,34);font-family:arial,sans-serif;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial">years <- 1989:2016</div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial">preds <- predict(res, transf = transf.ilogit, newmods =cbind(years,years^2))</div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial">wi <- 0.5/sqrt(data$s2)</div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial">wi <- 0.5 + 3.0 * (wi - min(wi))/(max(wi) - min(wi))</div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial">plot(data$year, transf.ilogit(y), cex=wi,xlab="Year",ylab="<wbr>Patient Expectation (%)")</div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial">lines(years, preds$pred)</div><div class="gmail-yj6qo gmail-ajU" style="outline:none;padding:10px 0px;width:22px;margin:2px 0px 0px;color:rgb(34,34,34);font-family:arial,sans-serif;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><div id="gmail-:1zc" class="gmail-ajR" tabindex="0" style="background-color:rgb(241,241,241);border:1px solid rgb(221,221,221);clear:both;line-height:6px;outline:none;width:20px"><img class="gmail-ajT" src="https://ssl.gstatic.com/ui/v1/icons/mail/images/cleardot.gif" style="background: url("//ssl.gstatic.com/ui/v1/icons/mail/ellipsis.png") no-repeat; height: 8px; opacity: 0.3; width: 20px;"></div></div><br></font></div><br></font></div><div style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><font color="#444444" face="Arial, Helvetica, sans-serif"><br></font></div><div style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><font color="#444444" face="Arial, Helvetica, sans-serif"><div><img src="cid:ii_jjh984qx0_16489de4e5e9c0ba" width="399" height="429" class="gmail-CToWUd gmail-a6T" tabindex="0" style="cursor: pointer; outline: 0px;"></div></font></div><br></div>