Risk Factor, Pattern, Etiology and Outcome in Ischemic Stroke Patients with Cancer: A Nested Case-Control Study

A matched nested case–control study of 33 paired cases and controls was conducted, based on a study cohort in Long An county, Guangxi, China, to determine whether infection with hepatitis B virus (HBV) with pre-S deletions is independently associated with the development of hepatocellular carcinoma (HCC), without the confounding effects of basal core promoter (BCP) double mutations. The prevalence of pre-S deletions was significantly higher in HCC (45.5 %, 15 of 33) than the controls (18.2 %, 6 of 33) (P<0.01), under the control of the influence of BCP double mutations. Most of the pre-S deletions occurred in, or involved, the 5′ half of the pre-S2 region and the difference between HCC (93.3 %, 14 of 15) and controls (66.7 %, four of six) was significant for this region (P=0.015). There was no significant difference in pre-S deletions between the BCP mutant group and BCP wild-type group (P>0.05), nor was the prevalence of pre-S deletions significantly different between genotypes B and C (P>0.1). These results suggest that pre-S deletions constitute an independent risk factor for HCC and their emergence and effect are independent of BCP mutations. The 5′ terminus of pre-S2 is the favoured site for the deletion mutations, especially in HCC cases. Further prospective studies are required to confirm the role of these mutations in the development of HCC.

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Abstract NS2: Effect of Volume-Viscosity Swallow Test (V-VST) in Acute Ischemic Stroke Patients With Dysphagia: A Hospital-Based Case-Control Study

Stroke ◽

10.1161/str.51.suppl_1.ns2 ◽

2020 ◽

Vol 51 (Suppl_1) ◽

Author(s):

Ting Ye ◽

Yi Dong ◽

Shengyan Huang

Keyword(s):

Ischemic Stroke ◽

Acute Ischemic Stroke ◽

Case Control Study ◽

Tube Feeding ◽

Case Control ◽

Stroke Patients ◽

Post Intervention ◽

Post Stroke ◽

Volume Viscosity ◽

Control Study

Background: The dysphagia screening in acute ischemic stroke plays an important role in patients with risk of dysphagia. The aim of this hospital-based case-control study is to explore if V-VST, as a new nurse-driven dysphagia screening tool for AIS patients, might help to reduce the rate of post-stroke pneumonia and early withdraw of feeding tube. Methods: 1598 acute ischemic stroke patients were enrolled in this study. The standard protocol in AIS patients were assessed by WST (before intervention and plus with V-VST after intervention). The V-VST assessment were be trained in two senior nurses and all AIS patients were assessed by V-VST during July 1and Dec 30 th , 2017. Among 299 AIS patients with suspected, all clinical data were analyzed. The comparison of their rate of pneumonia in hospital and withdraw rate of tubefeeding before discharge were performed between patients post-intervention (January 1, 2018-June 30, 2019)and those admitted before the intervention (January 1, 2016-June 30, 2017). Results: The baseline characteristics of the pre- and post- intervention AIS groups were similar in age, gender, NIHSS. The implementation of V-VST have a statistically significant reducing the risk of pneumonia with an adjusted HR (0.60, 95% CI 0.43-0.84, P=0.003). Additionally, follow-up V-VST were likely to be associated the withdraw rate of tube-feeding at discharge (29/168 vs 38/131 P=0.016).There is also a trend of length of tube-feeding decreasing (8.32±12.27 vs 6.84±8.61 P=0.241). Conclusion: In our study, the V-VST is a feasible bedside tool. The implemental might be associated with the reduction of post-stroke pneumonia. Therefore, it meets the requirements of a clinical screening test for dysphagia in acute stroke patients at bedside. Large prospective interventional study is needed to confirm our findings. V-VST: Volume-viscosity Swallow Test WST: Water Swallow Test AIS: Acute Ischemic Stroke HR: hazard ratio

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