A Propensity-Matched Analysis of COVID-19 in Kidney Transplant Recipients Compared With Non-Kidney Transplant Patients: A Single-Center Report From India.

Abstract

Comparisons of COVID-19 incidence between kidney transplant recipients and patients who did not receive kidney transplant are underexplored in various geographic regions. This Indian, single-center, retrospective study analyzed COVID-19 data of patients hospitalized between May 12, 2020, and January 11, 2021. A propensity matching score was used to compare outcomes between the 2 groups. We also used multivariable Cox proportional hazard analyses to assess association of kidney transplantation with mortality. Of the 1627 COVID-19 cases, 179 were kidney transplant recipients and 1448 were not kidney transplant patients (control group). Ofthe 436 reported in-hospital deaths, 20 (11.1%) were in the kidney transplant group and 416 (28.7%) were in the control group. Propensity matching identified 98 kidney transplantrecipients and167 controlpatients. InKaplanMeier survival plots for these patients, there was no statistical difference in mortality (log-rank, Mantel Cox test; P = .07) or severity (log-rank, Mantel Cox test; P = .07) with regard to COVID-19. In Cox analysis, age groups from 61 to 70 years (hazard ratio = 1.5; 95% CI, 1.0-2.2; P = .04), 71 to 80 years (hazard ratio = 1.64; 95% CI, 1.0-2.5; P = .02), and >80 years (hazard ratio = 1.91; 95% CI, 1.1-3.1; P = .01)were associatedwith statistically significant greater mortality.Having a kidney transplant (hazard ratio = 0.43; 95% CI, 0.3-0.7; P = 0.001) was not associated with mortality. In our analysis, age was the most important predictor of mortality. Kidney transplant status was not found to have an independent association with mortality and severity.