A nationwide Dutch cohort study shows relatively good pregnancy outcomes after kidney transplantation and finds risk factors for adverse outcomes

Although numbers of pregnancy after kidney transplantation (KT) are rising, high risks of adverse pregnancy outcomes (APO) remain. Though important for pre-conception counselling and pregnancy monitoring, analyses of pregnancy outcomes after KT per pre-pregnancy estimated glomerular filtration rate-chronic kidney disease (eGFR-CKD)-categories have not been performed on a large scale before. To do this, we conducted a Dutch nationwide cohort study of consecutive singleton pregnancies over 20 weeks of gestation after KT. Outcomes were analyzed per pre-pregnancy eGFR-CKD category and a composite APO (cAPO) was established including birth weight under 2500 gram, preterm birth under 37 weeks, third trimester severe hypertension (systolic blood pressure over 160 and/or diastolic blood pressure over 110 mm Hg) and/or over 15% increase in serum creatinine during pregnancy. Risk factors for cAPO were analyzed in a multilevel model after multiple imputation of missing predictor values. In total, 288 pregnancies in 192 women were included. Total live birth was 93%, mean gestational age 35.6 weeks and mean birth weight 2383 gram. Independent risk factors for cAPO were pre-pregnancy eGFR, midterm percentage serum creatinine dip and midterm mean arterial pressure dip; odds ratio 0.98 (95% confidence interval 0.96–0.99), 0.95 (0.93-0.98) and 0.94 (0.90-0.98), respectively. The cAPO was a risk indicator for graft loss (hazard ratio 2.55, 1.09-5.96) but no significant risk factor on its own when considering pre-pregnancy eGFR (2.18, 0.92-5.13). This was the largest and most comprehensive study of pregnancy outcomes after KT, including pregnancies in women with poor kidney function, to facilitate individualized pre-pregnancy counselling based on pre-pregnancy graft function. Overall obstetric outcomes are good. The risk of adverse outcomes is mainly dependent on pre-pregnancy graft function and hemodynamic adaptation to pregnancy

Effect of Pregnancy on eGFR after Kidney Transplantation:A National Cohort Study

BACKGROUND: The effect of pregnancy on the course of estimated glomerular filtration rate (eGFR) is unknown in kidney transplant recipients (KTRs). METHODS: We conducted a nationwide multicenter cohort study in KTRs with pregnancy (>20 weeks) after kidney transplantation (KT). Annual eGFR's after KT until death or graft loss and additional eGFR's before each pregnancy were collected according to protocol. Changes in eGFR slope before and after each pregnancy were analyzed by generalized estimating equations (GEE) multilevel analysis adjusted for transplant vintage. RESULTS: We included 3194 eGFR measurements before and after pregnancy in 109 (55%) KTRs with 1, 78 (40%) with 2 and 10 (5%) with 3 pregnancies after KT. Median follow-up after first delivery post-KT was 14 years (IQR 18 years). Adjusted mean eGFR pre-pregnancy was 59 ml/min/1.73m2 (SEM 1.72; 95% CI 56-63), after first pregnancy 56 ml/min/1.73m2 (SEM 1.70; 95% CI 53-60), after second pregnancy 56 ml/min/1.73m2 (SEM 2.19; 95% CI 51-60) and after third pregnancy 55 ml/min/1.73m2 (SEM 8.63; 95% CI 38-72). Overall eGFR slope after first, second and third pregnancy was not significantly worse than pre-pregnancy (p = 0.28). However, adjusted mean eGFR after first pregnancy was 2.8 ml/min/1.73m (p = 0.08) lower than pre-pregnancy. CONCLUSIONS: First pregnancy has a small, but no significant, effect on eGFR slope in KTR. Midterm hyperfiltration, a marker for renal reserve capacity, was associated with better eGFR and death-censored graft survival. In this KTR cohort with long-term follow-up, no significant effect of pregnancy on kidney function was detected

Counselling on Conceiving: Attitudes and Factors Influencing Advice of Professionals in Transplantation

Pregnancy after kidney transplantation (KT) conveys risks of adverse pregnancy outcomes (APO). Little is known about performance of pre-pregnancy counselling after KT. This study investigated perceptions of risk, attitudes towards pregnancy and factors influencing advice given at pre-pregnancy counselling after KT. A web-based vignette survey was conducted among nephrologists and gynaecologists between March 2020 and March 2021, consisting of five vignettes containing known risk factors for APO and general questions on pre-pregnancy counselling after KT. Per vignette, attitudes towards pregnancy and estimation of outcomes were examined. In total 52 nephrologists and 25 gynaecologists participated, 56% from university hospitals. One third had no experience with pregnancy after KT. All gave positive pregnancy advice in the vignette with ideal circumstances (V1), versus 83% in V2 (proteinuria), 81% in V3 (hypertension), 71% in V4 (eGFR 40 ml/min/1.73 m2). Only 2% was positive in V5 (worst-case scenario). Chance of preeclampsia was underestimated by 89% in V1. 63% and 98% overestimated risk for graft loss in V4 and V5. Professionals often incorrectly estimated risk of APO after KT. As experience with pregnancy after KT was limited among professionals, patients should be referred to specialised centres for multidisciplinary pre-pregnancy counselling to build experience and increase consistency in given advice

EXPloring attitudes and factors influencing reproductive Choices in kidney Transplant patients (The EXPECT-study)

Pregnancy can have risks after kidney transplantation (KT). This mixed-methods study aimed to identify the percentage of women getting pregnant after KT and explore motives for and against pregnancy together with psychosocial and medical factors involved in decision making. Furthermore, experiences of pregnancy and child-raising were explored. Women who got pregnant after KT were matched with women who had not been pregnant after KT. Semi-structured interviews were conducted, transcribed verbatim and analyzed using directed content analysis. After KT, only 12% of women got pregnant. Eight women with pregnancies after KT were included (P-group) and matched with 12 women who had not been pregnant after KT (NP-group). Women after KT experienced a high threshold to discuss their pregnancy wish with their nephrologist. The nephrologists’ advice played an important role in decision-making, but differed between the groups. In the P-group, a desire for autonomy and positive role models were decisive factors in proceeding with their pregnancy wish. In the NP-group, disease burden and risk perception were decisive factors in not proceeding with their pregnancy. Nephrologists need to be proactive in broaching this subject and aware of factors influencing the decision and outcomes. Standardized preconception guidelines on pregnancy counseling are recommended

Exploring health literacy and self-management after kidney transplantation: A prospective cohort study

Objective: Investigate the influence of health literacy and self-management on complications, kidney function and graft failure after kidney transplantation. Methods: We included patients who received a kidney transplant between May 2012 and May 2013 and monitored outcomes until December 2018. Health literacy was measured using the Newest Vital Sign and self-management using the Partner in Health scale (before discharge, and after 6 and 12 months). Subscales are aftercare & knowledge, coping, recognition and management of symptoms, healthy lifestyle. Complications were categorized as rejection, viral infections, and bacterial infections. Kidney function was measured using eGFR and graft survival using days until failure. Results: We included 154 patients. Higher health literacy at baseline and at 12 months was related to more viral infections (p = 0.02; p < 0.01). Lower ‘coping’ at baseline was related to more bacterial infections (p = 0.02). Higher ‘after-care and knowledge’ at 6 months (p < 0.01), and ‘recognition and management of symptoms’ at 6 months were associated with lower graft failure (p < 0.01). Conclusion: Health literacy did not influence kidney transplant related outcomes. Higher knowledge and management of symptoms were related to lower graft failure. Practice implications: Self-management support is a key focus for health care providers in the multidisciplinary team

Evaluating the feasibility of a nurse-led self-management support intervention for kidney transplant recipients: a pilot study

Abstract Background To support effective self-management after kidney transplantation, a holistic nurse-led self-management support intervention was developed using the Intervention Mapping approach. The primary aim was to evaluate the feasibility, acceptability and fidelity of the intervention for kidney transplant recipients and professionals. The secondary aim was to explore preliminary effects on outcomes. Methods A pilot study was conducted in 2015–2017 to evaluate the intervention. Nurse Practitioners (NP) guided recipients in assessing 14 life areas using the Self-Management Web. Participants were supported in developing self-regulation skills which can be applied to self-management of the illness. Strategies included goal setting, action planning, and promotion of motivation and self-efficacy. Adult recipients from an outpatient clinic of a Dutch University Hospital who underwent their transplant at least 1 month ago, were invited to participate. NPs, nephrologists and recipients were interviewed to assess feasibility, fidelity and implementation experience. Consultations were videoed and analysed to assess fidelity. To assess the preliminary effects, the intervention group completed baseline (T0) and follow-up (T1) questionnaires on self-management behavior, self-efficacy, quality of life and quality of care. A historical control group of kidney transplant recipients completed the same questionnaires at T1. Results Twenty-seven recipients agreed to participate in the intervention group, of which 24 completed the intervention and 16 completed baseline and follow-up surveys. The control group consisted of 33 recipients. Professionals and recipients appraised the open, holistic focus of the intervention as a welcome addition to standard care and felt that this helped to build a relationship of trust. Recipients also felt they became more competent in problem-solving skills. The within-group analysis showed no significant increase in patients’ self-management skills. The between-groups analysis showed significantly higher medication adherence among the intervention group (P = 0.03; G = 0.81). The within-groups analysis showed a significantly higher perceived quality of care (P = 0.02) in the intervention group. Conclusion This holistic nurse-led self-management support intervention was found to be feasible and acceptable by professionals and recipients alike. This pilot had a small sample therefore further research is needed into the potential effects on self-management behavior and well-being of transplant recipients. ISRCTN Trial Registry: ISRCTN15057632 (registered retrospectively on 20-07-2018)

COVID-19-related mortality in kidney transplant and dialysis patients: Results of the ERACODA collaboration

Background. Patients on kidney replacement therapy comprise a vulnerable population and may be at increased risk of death from coronavirus disease 2019 (COVID-19). Currently, only limited data are available on outcomes in this patient population. Methods. We set up the ERACODA (European Renal Association COVID-19 Database) database, which is specifically designed to prospectively collect detailed data on kidney transplant and dialysis patients with COVID-19. For this analysis, patients were included who presented between 1 February and 1 May 2020 and had complete information available on the primary outcome parameter, 28-day mortality. Results. Of the 1073 patients enrolled, 305 (28%) were kidney transplant and 768 (72%) dialysis patients with a mean age of 60 6 13 and 67 6 14 years, respectively. The 28-day probability of death was 21.3% [95% confidence interval (95% CI) 14.3\u201330.2%] in kidney transplant and 25.0% (95% CI 20.2\u201330.0%) in dialysis patients. Mortality was primarily associated with advanced age in kidney transplant patients, and with age and frailty in dialysis patients. After adjusting for sex, age and frailty, in-hospital mortality did not significantly differ between transplant and dialysis patients [hazard ratio (HR) 0.81, 95% CI 0.59\u20131.10, P \ubc 0.18]. In the subset of dialysis patients who were a candidate for transplantation (n \ubc 148), 8 patients died within 28 days, as compared with 7 deaths in 23 patients who underwent a kidney transplantation &lt;1 year before presentation (HR adjusted for sex, age and frailty 0.20, 95% CI 0.07\u20130.56, P &lt; 0.01). Conclusions. The 28-day case-fatality rate is high in patients on kidney replacement therapy with COVID-19 and is primarily driven by the risk factors age and frailty. Furthermore, in the first year after kidney transplantation, patients may be at increased risk of COVID-19-related mortality as compared with dialysis patients on the waiting list for transplantation. This information is important in guiding clinical decision-making, and for informing the public and healthcare authorities on the COVID-19-related mortality risk in kidney transplant and dialysis patients

Sex differences in COVID-19 mortality risk in patients on kidney function replacement therapy

In the general population with COVID-19, the male sex is an established risk factor for mortality, in part due to a more robust immune response to COVID-19 in women. Because patients on kidney function replacement therapy (KFRT) have an impaired immune response, especially kidney transplant recipients due to their use of immunosuppressants, we examined whether the male sex is still a risk factor for mortality among patients on KFRT with COVID-19. From the European Renal Association COVID-19 Database (ERACODA), we examined patients on KFRT with COVID-19 who presented between February 1st, 2020, and April 30th, 2021. 1204 kidney transplant recipients (male 62.0%, mean age 56.4 years) and 3206 dialysis patients (male 61.8%, mean age 67.7 years) were examined. Three-month mortality in kidney transplant recipients was 16.9% in males and 18.6% in females (p = 0.31) and in dialysis patients 27.1% in males and 21.9% in females (p = 0.001). The adjusted HR for the risk of 3-month mortality in males (vs females) was 0.89 (95% CI 65, 1.23, p = 0.49) in kidney transplant recipients and 1.33 (95% CI 1.13, 1.56, p = 0.001) in dialysis patients (pinteraction = 0.02). In a fully adjusted model, the aHR for the risk of 3-month mortality in kidney transplant recipients (vs. dialysis patients) was 1.39 (95% CI 1.02, 1.89, p = 0.04) in males and 2.04 (95% CI 1.40, 2.97, p < 0.001) in females (pinteraction = 0.02). In patients on KFRT with COVID-19, the male sex is not a risk factor for mortality among kidney transplant recipients but remains a risk factor among dialysis patients. The use of immunosuppressants in kidney transplant recipients, among other factors, may have narrowed the difference in the immune response to COVID-19 between men and women, and therefore reduced the sex difference in COVID-19 mortality risk