英语翻译The p values for the temporal trends of in-hospital outcomes and complications were obtained by modeling time as an ordinal independent variable using the logistic generalized estimating equations method with an exchangeable working correlation matrix to account for within-hospital clustering because patients at the same hospital are more likely to have similar responses relative to patients at other hospitals (i.e.,within-center correlation for r

英语翻译
The p values for the temporal trends of in-hospital outcomes and complications were obtained by modeling time as an ordinal independent variable using the logistic generalized estimating equations method with an exchangeable working correlation matrix to account for within-hospital clustering because patients at the same hospital are more likely to have similar responses relative to patients at other hospitals (i.e.,within-center correlation for responses)