survival predictors in paraquat intoxification and role of immunosuppression
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ID: 160655
2014
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Abstract
Paraquat poisoning resulted in multiorgan failure and is associated with high mortality. We audited 83 historical cases of paraquat poisoning in past 2 years treated with conventional decontamination and supportive treatment, followed by enrolling 85 patients over a 2 year period into additional immunosuppression with intravenous (i.v.) methylprednisolone and i.v. cyclophosphamide.
Our results showed that age, poor renal function and leucocytosis are the main predictors of fatal outcome. Immunosuppression regime rendered higher survival (6 out of 17 patients (35.3%)) versus historical control (1 out of 18 patients (5.6%)) (p = 0.041) in the cohort with admission eGFR < 50 ml/min/1.73 m2 and WBC count > 11,000/μL.
In contrast, there was no difference in survival with immunosuppression regime (38 out of 64 patients (59.4%)) compared to historical control (30 out of 52 patients (57.7%)) (p = 0.885) in those with eGFR > 50 ml/min/1.73 m2 or WBC < 11,000/μL at presentation.
Multivariable logistic regression showed survival probability = exp(logit)/(1 + exp(logit)), in which logit = 13.962 − (0.233 × ln(age (year))) − (1.344 × ln(creatinine (μmol/L))) − (1.602 × ln(rise in creatinine (μmol/day))) – (0.614 × ln(WBC (,000/μL))) + (2.021 × immunosuppression) and immunosuppression = 1 if given and 0 if not. Immunosuppression therapy yielded odds ratio of 0.132 (95% confidential interval: 0.029–0.603, p = 0.009).
In conclusion, immunosuppression therapy with intravenous methylprednisolone and cyclophosphamide may counteract immune mediated inflammation after paraquat poisoning and improve survival of patients with admission eGFR < 50 ml/min/1.73 m2 and WBC count > 11,000/μL.
| Reference Key |
koh2014toxicologysurvival
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| Authors | ;Keng-Hee Koh;Clare Hui-Hong Tan;Lawrence Wei-Soon Hii;Jun Lee;Laura Lui-Sian Ngu;Alvin Jung-Mau Chai;Chek-Loong Loh;Swee-Win Lam;Lily Mushahar;Tem-Lom Fam;Wan Shaariah Md Yusuf |
| Journal | international journal of systematic and evolutionary microbiology |
| Year | 2014 |
| DOI |
10.1016/j.toxrep.2014.06.010
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