RESUMEN
ObjectiveTo investigate the level of serum antibodies in COVID-19 patients six months after discharge， and to provide data to evaluate the duration of IgM， IgG and neutralizing antibody titers in the patients. MethodsEnzyme-linked immunosorbent assay （ELISA） was used to determine the antibody levels of IgM and IgG， and the new coronavirus live virus neutralization test was used to detect the neutralizing antibodies in the plasma of 181 recovered patients. ResultsThe IgG positive rate was 92.27% （167/181） in COVID-19 patients six months after discharge， while the lgM positive rate was 28.18% （51/181）. Six months after hospital discharge， 117 recovered patients （64.64%） were positive for IgG antibodies and negative for IgM antibodies， indicating that they had produced stable antibodies. This result suggested that they had been infected with the new coronavirus （SARS-CoV-2） and were in the recovery stage. The positive detection rate of neutralizing antibodies was as high as 91.71%. ConclusionSix months after infection with SARS-CoV-2， IgG antibodies produced in the patients continue to exist， and the neutralizing antibodies maintain a high and stable level. Results of this study have important guiding significance for future research on the durability of new coronavirus antibodies.
RESUMEN
ObjectiveTo investigate the level of serum antibodies in COVID-19 patients six months after discharge， and to provide data to evaluate the duration of IgM， IgG and neutralizing antibody titers in the patients. MethodsEnzyme-linked immunosorbent assay （ELISA） was used to determine the antibody levels of IgM and IgG， and the new coronavirus live virus neutralization test was used to detect the neutralizing antibodies in the plasma of 181 recovered patients. ResultsThe IgG positive rate was 92.27% （167/181） in COVID-19 patients six months after discharge， while the lgM positive rate was 28.18% （51/181）. Six months after hospital discharge， 117 recovered patients （64.64%） were positive for IgG antibodies and negative for IgM antibodies， indicating that they had produced stable antibodies. This result suggested that they had been infected with the new coronavirus （SARS-CoV-2） and were in the recovery stage. The positive detection rate of neutralizing antibodies was as high as 91.71%. ConclusionSix months after infection with SARS-CoV-2， IgG antibodies produced in the patients continue to exist， and the neutralizing antibodies maintain a high and stable level. Results of this study have important guiding significance for future research on the durability of new coronavirus antibodies.
RESUMEN
OBJECTIVE:To evaluate the content validity and interrater reliability of the modified medication discrepancy tool (MDT). METHODS:According to the structure of MDT(English edition),the terms of MDT were modified,and 5 invited ex-perts used content validity indicator to test the content validity of MDT. The interrater reliability method was adopted to test the reli-ability of MDT. The interrater reliability was performed by 2 evaluators to same 20 research objects with modified MDT. RE-SULTS:Average item-level content validity index was over 0.800,and scale-level content validity index was 0.970. The item-level interrater reliability was between 0.667 and 1.000(P<0.01). The scale-level interrater reliability was 0.840(P<0.01). CONCLU-SIONS:The modified MDT has good content validity and interrater reliability,and can be used to evaluate discharged medication discrepancies in China.