Outcomes of Chronic Subdural Hematoma in Patients with Liver Cirrhosis
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CLINICAL ARTICLE J Neurosurg 130:302–311, 2019 Outcomes of chronic subdural hematoma in patients with liver cirrhosis *Ching-Chang Chen, MD,1 Shao-Wei Chen, MD,2 Po-Hsun Tu, MD,1 Yin-Cheng Huang, MD, PhD,1 Zhuo-Hao Liu, MD,1 Alvin Yi-Chou Wang, MD,1 Shih-Tseng Lee, MD,1 Tien-Hsing Chen, MD,3 Chi-Tung Cheng, MD,4 Shang-Yu Wang, MD,4 and An-Hsun Chou, MD5 Departments of 1Neurosurgery and 5Anesthesiology and Divisions of 2Thoracic and Cardiovascular Surgery and 4Trauma and Emergency Surgery, Department of Surgery, Chang Gung Memorial Hospital, Linkou Medical Center, Chang Gung University; and 3Department of Cardiology, Chang Gung Memorial Hospital, Keelung Branch and Linkou Medical Center, Taoyuan City, Taiwan OBJECTIVE Burr hole craniostomy is an effective and simple procedure for treating chronic subdural hematoma (CSDH). However, the surgical outcomes and recurrence of CSDH in patients with liver cirrhosis (LC) remain unknown. METHODS A nationwide population-based cohort study was retrospectively conducted using data from the Taiwan Na- tional Health Insurance Research Database. The study included 29,163 patients who underwent first-time craniostomy for CSDH removal between January 1, 2001, and December 31, 2013. In total, 1223 patients with LC and 2446 matched non-LC control patients were eligible for analysis. All-cause mortality, surgical complications, repeat craniostomy, ex- tended craniotomy, and long-term medical costs were analyzed. RESULTS The in-hospital mortality rate (8.7% vs 3.1% for patients with LC and non-LC patients, respectively), frequen- cy of hospital admission, length of ICU stay, number of blood transfusions, and medical expenditures of patients with LC who underwent craniostomy for CSDH were considerably higher than those of non-LC control patients. Patients with LC tended to require an extended craniotomy to remove subdural hematomas in the hospital or during long-term follow-up. The surgical outcome worsened with an increase in the severity of LC. CONCLUSIONS Even for simple procedures following minor head trauma, LC remains a serious comorbidity with a poor prognosis. https://thejns.org/doi/abs/10.3171/2017.8.JNS171103 KEY WORDS chronic subdural hematoma; liver cirrhosis; burr hole; craniostomy; vascular disorders HRONIC subdural hematoma (CSDH) is a common patients present with LC because the incidence of chronic condition and tends to occur in elderly patients af- hepatitis and LC is higher in Taiwan and East Asia than in ter minor head trauma.6 Burr hole craniostomy is other regions.9,24 LC and its associated complications have Cthe simplest and most common treatment for the initial been identified as significant risk factors for increased stages of CSDH. Despite recurrence, CSDH has a favor- morbidity and mortality in trauma patients,7,12,13,17 and they able outcome and prognosis.6,32,33,38 However, in our pre- have a considerable effect on poor outcomes of major sur- viously published data, the mortality and complication gery. 8,9,13,16,23,35 To our knowledge, there is no published rates associated with CSDH in patients with liver cirrhosis report on the surgical risk of CSDH in patients with LC. (LC) were as high as 33.3% (5 of 15 patients).7 Because Conclusions regarding the effects of LC on minor head the number of cases in our previous study was small, our trauma and the outcomes of a simple surgical procedure, results were inconclusive. In our clinical practice, many such as CSDH, are tentative. Therefore, to understand the ABBREVIATIONS CCI = Charlson Comorbidity Index; CIC = catastrophic illness certificate; CSDH = chronic SDH; CTP = Child-Turcotte-Pugh; ICD-9-CM = International Classification of Diseases, 9th Revision, Clinical Modification; LC = liver cirrhosis; NHI = National Health Insurance; NHIRD = NHI Research Database; SDH = subdural hematoma; TBI = traumatic brain injury. SUBMITTED May 3, 2017. ACCEPTED August 1, 2017. INCLUDE WHEN CITING Published online February 2, 2018; DOI: 10.3171/2017.8.JNS171103. * C.C.C. and S.W.C. contributed equally to this work. 302 J Neurosurg Volume 130 • January 2019 ©AANS 2019, except where prohibited by US copyright law Unauthenticated | Downloaded 10/07/21 03:13 AM UTC C. C. Chen et al. FIG. 1. Enrollment of the study population. actual risks and outcomes of CSDH in patients with LC, national Classification of Diseases, 9th Revision, Clinical we used patient data from a large national database, the Modification (ICD-9-CM). This study was completely ex- Taiwan National Health Insurance Research Database empt from ethics review by the ethics institutional review (NHIRD). In this longitudinal cohort study, NHIRD was board of Chang Gung Memorial Hospital. used to analyze the outcomes of using craniostomy to treat CSDH in patients with LC. Study Population In this study, we included all hospitalization records of Methods patients who were admitted for CSDH and had undergone a craniostomy for CSDH treatment. Index hospitalization Data Source was defined as the date when the patient was admitted for We conducted this nationwide cohort study using data first-time craniostomy to remove CSDH between January from NHIRD. NHIRD is an administrative database of 1, 2001, and December 31, 2013. Patients were identified Taiwan’s National Health Insurance (NHI) program, using the diagnostic ICD-9-CM codes for subdural hem- which is a compulsory, universal health insurance pro- orrhage (432.1, 852.2, and 852.3) and the presence of NHI gram that covers nearly 100% of the 23.7 million resi- reimbursement procedure code 83038C, which is unique dents of Taiwan.19 The database contains comprehensive for craniostomy to “remove chronic subdural hematoma” health-related information, such as diagnostic codes, performed by neurosurgeons. Because acute subdural medical procedures, and prescription details. As of 2015, hematoma (SDH) should typically be treated with crani- more than 3000 research articles based on NHIRD data otomy (NHI code 83037C), our study population included had been published. NHIRD uses information protection only nonacute patients. Otherwise, patients younger than measures, including an extremely strict data access pro- 20 years were excluded from our study, as shown in Fig. cedure and encryption of all personal information with 1. The study population was divided into LC and non-LC anonymous 32-digit identification numbers. In NHIRD groups according to the diagnosis of cirrhosis (ICD-9-CM data, disease diagnoses are coded according to the Inter- codes 571.2, 571.5, and 571.6). J Neurosurg Volume 130 • January 2019 303 Unauthenticated | Downloaded 10/07/21 03:13 AM UTC C. C. Chen et al. TABLE 1. Baseline characteristics of the study population Before Matching After Matching Variable LC Patients Non-LC Patients p Value LC Patients Non-LC Patients p Value No. of patients 1225 27,938 1223 2446 Age, mean ± SD, yrs 63.7 ± 15.3 70.5 ± 13.9 <0.001 63.7 ± 15.3 63.6 ± 15.9 0.949 Age in yrs 20–39 85 (6.9) 1092 (3.9) <0.001 85 (7.0) 177 (7.2) 0.946 40–59 412 (33.6) 4412 (15.8) 410 (33.5) 809 (33.1) 60–79 535 (43.7) 15,154 (54.2) 535 (43.7) 1059 (43.3) ≥80 193 (15.8) 7280 (26.1) 193 (15.8) 401 (16.4) Sex 0.009 0.840 Male 968 (79.1) 21,181 (75.8) 967 (79.1) 1941 (79.4) Female 256 (20.9) 6750 (24.2) 256 (20.9) 505 (20.6) Comorbid conditions Diabetes mellitus 470 (38.4) 6982 (25.0) <0.001 469 (38.3) 922 (37.7) 0.700 Hypertension 566 (46.2) 14,039 (50.3) 0.006 566 (46.3) 1150 (47.0) 0.674 Hyperlipidemia 126 (10.3) 2231 (8.0) 0.004 125 (10.2) 255 (10.4) 0.848 Heart failure 119 (9.7) 1632 (5.8) <0.001 119 (9.7) 249 (10.2) 0.669 Coronary artery disease 226 (18.4) 4344 (15.5) 0.006 226 (18.5) 439 (17.9) 0.694 History of myocardial infarction 29 (2.4) 749 (2.7) 0.505 29 (2.4) 52 (2.1) 0.634 Peripheral arterial disease 24 (2.0) 424 (1.5) 0.219 24 (2.0) 59 (2.4) 0.388 Prior ischemic stroke 202 (16.5) 4240 (15.2) 0.211 202 (16.5) 394 (16.1) 0.752 Prior hemorrhagic stroke 113 (9.2) 1822 (6.5) <0.001 113 (9.2) 220 (9.0) 0.807 Prior seizure 126 (10.3) 876 (3.1) <0.001 126 (10.3) 230 (9.4) 0.386 Dialysis 51 (4.2) 543 (1.9) <0.001 51 (4.2) 96 (3.9) 0.721 Chronic obstructive pulmonary disease 180 (14.7) 2596 (9.3) <0.001 179 (14.6) 360 (14.7) 0.947 Malignancy 186 (15.2) 1944 (7.0) <0.001 185 (15.1) 391 (16.0) 0.500 CCI, mean ± SD 5.1 ± 2.8 1.9 ± 2.2 <0.001 5.1 ± 2.8 2.6 ± 2.8 <0.001 CCI score 1 99 (8.1) 15,546 (55.6) <0.001 98 (8.0) 1121 (45.8) <0.001 2–3 295 (24.1) 7472 (26.7) 295 (24.1) 650 (26.6) 4–5 329 (26.9) 2897 (10.4) 329 (26.9) 322 (13.2) ≥6 502 (41.0) 2023 (7.2) 501 (41.0) 353 (14.4) Hospital level <0.001 0.793 Regional/district hospital 736 (60.1) 14,121 (50.5) 735 (60.1) 1481 (60.5) Tertiary teaching hospital 489 (39.9) 13,817 (49.5) 488 (39.9) 965 (39.5) Length of follow-up, yrs 2.8 ± 3.0 4.5 ± 3.7 <0.001 2.8 ± 3.0 4.2 ± 3.6 <0.001 Data are shown as the number of patients (%) unless indicated otherwise.