Publications by authors named "Mohammad Hasan Dehghani Firouzabadi"

2 Publications

  • Page 1 of 1

Short-term and long-term survival of kidney allograft: cure model analysis.

Iran J Kidney Dis 2014 May;8(3):225-30

Departments of Nephrology, Urology and Renal Transplantation, Kerman University of Medical Sciences, Kerman, Iran.

Introduction: Kidney allograft failure is a major concern in kidney transplant recipients. We separately assessed risk factors for long-term and short-term survival of death-censored kidney allograft.

Materials And Methods: This study included 397 kidney recipients who underwent surgery in Afzalipour Hospital, Kerman, Iran, from 2004 to 2010. The Cox mixture cure model was used to fit independent variables for prediction of graft survival in short-term and long-term.

Results: Allograft failure occurred in 43 kidney transplant recipients (10.8%). Among the long-term survivors, hypertension (odds ratio, 3.35; 95% confidence interval [CI], 1.6 to 6.7), a serum creatinine level greater than 1.6 at hospital discharge (odds ratio, 15.1; 95% CI, 7.2 to 31.9), and donor age (odds ratio, 1.14; 95% CI, 1.09 to 1.18) were significant predictors of allograft failure. Overweight, obesity, and male donor were associated with better survival. In short-term survivors, a high body mass index (hazard ratio, 3.59; 95% CI, 1.2 to 10.7) and longer duration of pretransplant dialysis (hazard ratio, 2.4; 95% CI, 1.07 to 5.7) were associated with graft failure, while the risk of allograft failure decreased in recipients who received kidney transplants from living donors versus deceased donors (hazard ratio, 0.3; 95% CI: 0.11 to 0.78) and with each 1-year increase in donor age (hazard ratio, 0.91; 95% CI, 0.86 to 0.96).

Conclusions: Many efforts have been made to improve short-term survival of kidney allograft. The cure analysis extends the knowledge by showing that control of which variables can improve both long-term and short-term survival rates.
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May 2014

Multi-state survival analysis in renal transplantation recipients.

Iran J Public Health 2014 Mar;43(3):316-22

1. Dept. of Epidemiology and Biostatistics, Tehran University of Medical Sciences , Tehran, Iran.

Background: Renal transplantation is a therapy for end-stage renal disease. During the study of recipients' survival after renal transplantation, there are some events as intermediate events that not only affect the recipients' survival but also events which are affected by various factors. The aim of this study was to handle these intermediate events in order to identify factors that affect recipients' survival by using multi-state models.

Methods: This retrospective cohort study included 405 renal transplant patients from Afzalipour Hospital, Kerman, Iran, from 2004 to 2010. The survival time of these recipients was determined after transplantation and the effect of various factors on the death hazard with and without renal allograft failure and hazard of renal allograft failure was studied by using multi-state models.

Results: During 4.06 years (median) of follow-up; 28 (6.9%) recipients died and allograft failure occurred in 51 (12.6%) recipients. Based on the results of multi-state model, receiving a living kidney transplantation decreased the hazard of renal allograft failure (HR=0.38; 95% CI: 0.17- 0.87), pre-transplant hypertension (HR=2.94; 95% CI: 1.54- 5.63) and serum creatinine levels >1.6 upon discharge from the hospital (HR=7.38; 95% CI: 3.87- 7.08) increased the hazard of renal allograft failure. Receiving living kidney transplantation decreased the hazard of death directly (HR=0.18; 95% CI: 0.04- 0.93).

Conclusion: It was concluded that the effect of donor type, pre-transplant hypertension and having serum creatinine >1.6 upon discharge from the hospital was significant on hazard of renal allograft failure. The only variable that had a direct significant effect on hazard of death was donor type.
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March 2014