We aimed to determine whether chronic kidney disease (CKD) is associated with adverse in-hospital outcomes after acute ischaemic stroke (AIS) and whether this association is dependent on thrombolysis administration.
885,537 records representative of 4,283,086 AIS admissions were extracted from the US National Inpatient Sample (2005–2015) and categorized into 3 mutually exclusive groups: no CKD, CKD without end-stage renal disease (ESRD) and ESRD. Outcomes (mortality, prolonged hospitalisation >4 days and disability on discharge—derived using discharge destination as a proxy) were compared between groups using multivariable logistic regressions. Separate models containing interaction terms with thrombolysis were also computed.
The median age (interquartile range) of the cohort was 73 (61–83) years and 47.32% were men. Compared with the no CKD group, both CKD/no ESRD group (odds ratio (99% confidence interval) = 1.04 (1.0003–1.09), p = 0.009) and the ESRD groups (2.06 (1.90–2.25), p < 0.001) had significantly increased odds of in-hospital mortality. Patients with CKD/No ESRD (1.03 (1.02–1.06), p < 0.001) and ESRD (1.44 (1.37–1.51), p < 0.001) were at higher odds of prolonged hospitalisation. Patients with CKD/No ESRD (1.13 (1.10–1.15), p < 0.001) and ESRD (1.34 (1.26–1.41), p < 0.001) were also at higher odds of moderate-to-severe disability on discharge. Interaction terms between thrombolysis and the CKD/ESRD groups were not statistically significant (p > 0.01) for any outcome.
Renal dysfunction was independently associated with worse in-hospital outcomes in the acute phase of AIS. These associations were not influenced by the use of thrombolysis as an emergency treatment for AIS. CKD/ESRD should not represent sole contraindications to thrombolysis for AIS.