Characterization of hospital airborne SARS-CoV-2.

BACKGROUND: The mechanism for spread of SARS-CoV-2 has been attributed to large particles produced by coughing and sneezing. There is controversy whether smaller airborne particles may transport SARS-CoV-2. Smaller particles, particularly fine particulate matter (≤ 2.5 µm in diameter), can remain airborne for longer periods than larger particles and after inhalation will penetrate deeply into the lungs. Little is known about the size distribution and location of airborne SARS-CoV-2 RNA. METHODS: As a measure of hospital-related exposure, air samples of three particle sizes (> 10.0 µm, 10.0-2.5 µm, and ≤ 2.5 µm) were collected in a Boston, Massachusetts (USA) hospital from April to May 2020 (N = 90 size-fractionated samples). Locations included outside negative-pressure COVID-19 wards, a hospital ward not directly involved in COVID-19 patient care, and the emergency department. RESULTS: SARS-CoV-2 RNA was present in 9% of samples and in all size fractions at concentrations of 5 to 51 copies m-3. Locations outside COVID-19 wards had the fewest positive samples. A non-COVID-19 ward had the highest number of positive samples, likely reflecting staff congregation. The probability of a positive sample was positively associated (r = 0.95, p < 0.01) with the number of COVID-19 patients in the hospital. The number of COVID-19 patients in the hospital was positively associated (r = 0.99, p < 0.01) with the number of new daily cases in Massachusetts. CONCLUSIONS: More frequent detection of positive samples in non-COVID-19 than COVID-19 hospital areas indicates effectiveness of COVID-ward hospital controls in controlling air concentrations and suggests the potential for disease spread in areas without the strictest precautions. The positive associations regarding the probability of a positive sample, COVID-19 cases in the hospital, and cases in Massachusetts suggests that hospital air sample positivity was related to community burden. SARS-CoV-2 RNA with fine particulate matter supports the possibility of airborne transmission over distances greater than six feet. The findings support guidelines that limit exposure to airborne particles including fine particles capable of longer distance transport and greater lung penetration.

Outcome of prolonged video-EEG monitoring in a new VA monitoring unit.

BACKGROUND AND OBJECTIVE: For patients with refractory seizures or seizure-like activity, prolonged inpatient video-electroencephalography (EEG) (v-EEG) is standard of care to guide diagnosis and management. The purpose of this study was to describe the outcome of v-EEG in a new Veterans' Administration (VA) hospital epilepsy monitoring unit (EMU). METHODS: We reviewed all prolonged (>24 h) inpatient v-EEGs performed in our EMU (2 beds) at the James A Haley VA in Tampa, FL over a five-and-a-half-year period (11/2013-07/2019). A total of 216 prolonged v-EEGs were performed. The patient population consisted of adult veterans (185 males, 31 females) ranging from 21 years to 89 years old (mean 52.5). The duration of monitoring ranged from 24 h to 9 days (mean 3.6 days). RESULTS: Of the 216 studies, 39 (18%) exclusively had epileptic seizures (ES). Of these, 37 (95%) had focal seizures, and 2 (5%) had generalized seizures. Of the 37 cases with focal seizures, all but 2 had clear ictal changes on EEG. Eighteen (8.5%) EEG studies revealed interictal epileptiform abnormalities without a clinical event. Sixty-eight (31.5%) of the v-EEGs had exclusively nonepileptic events (NEE). Of these, 27 (12.5%) were psychogenic nonepileptic seizures (PNES), and 41 (19%) were other NEE. Ninety-one (42%) of the studies were inconclusive, either because of lack of events captured (63) or because the events recorded were not the patient's typical episodes (27). SIGNIFICANCE: Compared to non-VA series, we found a lower proportion of PNES, and a higher proportion of inconclusive studies.

Ketamine Administration During Hospitalization Is Not Associated With Posttraumatic Stress Disorder Outcomes in Military Combat Casualties: A Matched Cohort Study.

BACKGROUND: Ketamine is routinely used within the context of combat casualty care. Despite early concerns that ketamine administration may be associated with elevated risk of posttraumatic stress disorder (PTSD), more recent evidence suggests no relationship. Because PTSD occurs with regular frequency in Operation Iraqi Freedom/Operation Enduring Freedom (OIF/OEF) Service Members (SMs) and combat-related injuries are associated with higher likelihood of PTSD, it is important to investigate the relationship between ketamine exposure during inpatient medical and surgical care and PTSD symptoms in OIF/OEF SMs. METHODS: Medical record data from OIF/OEF SMs medically evacuated from combat (N = 1158) included demographic characteristics, injury severity, body areas injured, and PTSD Checklist (PCL) scores. The primary analysis assessed the association between ketamine versus nonketamine exposure on positive PTSD screen (logistic regression) and PCL scores (linear regression) after using 1:1 propensity score matching to adjust for available potential confounding variables. Because there were 2 primary outcomes, the binary positive PTSD screen (yes/no) and continuous PCL score, the significance level was set at P ≤ .025. In sensitivity analyses, propensity scores were used to match ketamine to nonketamine records in a 1:4 ratio, as well as to conduct inverse probability treatment weighting (IPTW). Regressions examining the relationship between ketamine exposure and outcomes were repeated for unconditional, 1:4 matching, and IPTW models. RESULTS: In the sample, 107 received ketamine and 1051 did not. In the logistic regression, the probability of a positive PTSD screen was not significantly different between ketamine versus nonketamine patients (odds ratio [OR] = 1.28; 95% confidence interval [CI], 0.48-3.47; P = .62). In the linear regression, PCL scores were not significantly different between ketamine versus nonketamine patients (mean difference = 1.98 [95% CI, -0.99 to 4.96]; P = .19). The results were consistent in the unconditional, 1:4 matching, and IPTW models. CONCLUSIONS: No differences in PTSD screening risk or symptom levels between ketamine exposed and nonexposed were found. Given the small sample size, wide CIs of the effects, and additional confounds inherent to retrospective studies, future studies are needed to examine the complex relationships between ketamine and psychological symptoms.

Risk Trajectories for Readmission and Death After Cirrhosis-Related Hospitalization.

INTRODUCTION: Patients hospitalized for cirrhosis are at high risk for readmission and death for the first 30 days following discharge. However, there is no information on how these risks dynamically change over a full year after discharge. Our aim was to determine the absolute risks of first readmission and death and characterize these changes in the first year following hospital discharge. METHODS: We conducted a retrospective cohort study of patients who were hospitalized with cirrhosis at all Veterans Affairs hospitals and discharged home between 01/01/2010 and 12/31/2013. We used separate survival models to determine risk of first readmission and death after hospital discharge. We also examined the absolute daily risks for first readmission and death by day and identified the time required for risks of readmission and death to decline 50% and 75% from maximum values. RESULTS: Of the 38,955 patients who survived index hospitalization for cirrhosis, 23,318 patients (59.9%) had at least one readmission and 11,567 patients (29.7%) died within the first year. Daily risk of readmission was the highest on day 1 (1.23%) and declined 50% by day 71 and 75% by day 260. After 1 year, daily risk of readmission did not plateau. Daily risk of death was the highest on day 1 (0.78%) and declined 50% by day 31 and 75% by day 64. CONCLUSION: The risk of readmission and death after cirrhosis-related hospitalization remains elevated for prolonged periods. Patients and providers should remain vigilant for clinical health deterioration beyond the first 30 days following hospitalization.

Off-Pump Versus On-Pump: Long-Term Outcomes After Coronary Artery Bypass in a Veteran Population.

OBJECTIVES: The authors sought to investigate long-term outcomes after revascularization with and without use of cardiopulmonary bypass and hypothesized that off-pump would be comparable with on-pump. The primary outcome of interest was survival, and secondary outcomes were need for reintervention for revascularization or new diagnosis of myocardial infarction occurring any time after surgery during the 8- to 12-year follow-up period. DESIGN: Retrospective cohort analysis. SETTING: Veterans Affairs Medical Center. PARTICIPANTS: All patients undergoing primary isolated coronary bypass between January 1, 2004, and December 31, 2008 (n = 555). INTERVENTIONS: Coronary artery bypass on-pump (n = 238) or off-pump (n = 317). MEASUREMENTS AND MAIN RESULTS: Demographic and clinical variables were documented, including information on mortality, new myocardial infarction, and need for reintervention in the 8- to 12-year period after surgery. The on-pump and off-pump groups were similar regarding all demographic and clinical variables (p > 0.05), except for higher incidence of prior percutaneous coronary intervention in the off-pump group. There were more perioperative complications in the on-pump group (p = 0.007) and a greater number of grafts used (p = 0.000). Kaplan-Meier survival analysis demonstrated no significant difference (p > 0.05) in overall survival, reintervention-free survival, or postoperative myocardial infarction-free survival between patients who underwent bypass grafting on-pump or off-pump over extended follow-up averaging 10years. CONCLUSIONS: The present study's data did not show differences in key long-term outcomes between patients who underwent revascularization with or without cardiopulmonary bypass, supporting the idea that both methods achieve similar late results regarding overall survival, need for reintervention, and postoperative myocardial infarction.

Identifying Latent Subgroups of High-Risk Patients Using Risk Score Trajectories.

OBJECTIVE: Many healthcare systems employ population-based risk scores to prospectively identify patients at high risk of poor outcomes, but it is unclear whether single point-in-time scores adequately represent future risk. We sought to identify and characterize latent subgroups of high-risk patients based on risk score trajectories. STUDY DESIGN: Observational study of 7289 patients discharged from Veterans Health Administration (VA) hospitals during a 1-week period in November 2012 and categorized in the top 5th percentile of risk for hospitalization. METHODS: Using VA administrative data, we calculated weekly risk scores using the validated Care Assessment Needs model, reflecting the predicted probability of hospitalization. We applied the non-parametric k-means algorithm to identify latent subgroups of patients based on the trajectory of patients' hospitalization probability over a 2-year period. We then compared baseline sociodemographic characteristics, comorbidities, health service use, and social instability markers between identified latent subgroups. RESULTS: The best-fitting model identified two subgroups: moderately high and persistently high risk. The moderately high subgroup included 65% of patients and was characterized by moderate subgroup-level hospitalization probability decreasing from 0.22 to 0.10 between weeks 1 and 66, then remaining constant through the study end. The persistently high subgroup, comprising the remaining 35% of patients, had a subgroup-level probability increasing from 0.38 to 0.41 between weeks 1 and 52, and declining to 0.30 at study end. Persistently high-risk patients were older, had higher prevalence of social instability and comorbidities, and used more health services. CONCLUSIONS: On average, one third of patients initially identified as high risk stayed at very high risk over a 2-year follow-up period, while risk for the other two thirds decreased to a moderately high level. This suggests that multiple approaches may be needed to address high-risk patient needs longitudinally or intermittently.

Women's Healthcare Utilization Following Routine Screening for Past-Year Intimate Partner Violence in the Veterans Health Administration.

BACKGROUND: Experience of intimate partner violence (IPV) can have adverse health impacts and has been associated with elevated rates of healthcare service utilization. Healthcare encounters present opportunities to identify IPV-related concerns and connect patients with services. The Veterans Health Administration (VHA) conducts IPV screening within an integrated healthcare system. OBJECTIVE: The objectives of this study were to compare service utilization in the 6 months following IPV screening between those screening positive and negative for past-year IPV (IPV+, IPV-) and to examine the timing and types of healthcare services accessed among women screening IPV+. DESIGN: A retrospective chart review was conducted for 8888 female VHA patients across 13 VHA facilities who were screened for past-year IPV between April 2014 and April 2016. MAIN MEASURES: Demographic characteristics (age, race, ethnicity, marital status, veteran status), IPV screening response, and healthcare encounters (based on visit identification codes). KEY RESULTS: In the 6 months following routine screening for past-year IPV, patients screening IPV+ were more likely to utilize outpatient care (aOR = 1.85 [CI 1.26, 2.70]), including primary care or psychosocial care, and to have an inpatient stay (aOR = 2.09 [CI 1.23, 3.57]), compared with patients screening IPV-. Among those with any utilization, frequency of outpatient encounters within the 6-month period following screening was higher among those screening IPV+ compared with those screening IPV-. The majority of patients screening positive for past-year IPV returned for an outpatient visit within a brief time frame following the screening visit (> 70% within 14 days, >95% within 6 months). More than one in four patients screening IPV+ had an emergency department visit within the 6 months following screening. CONCLUSIONS: Women who screen positive for past-year IPV have high rates of return to outpatient visits following screening, presenting opportunities for follow-up support. Higher rates of emergency department utilization and inpatient stays among women screening IPV+ may indicate adverse health outcomes related to IPV experience.

Predictors of Participation in a Nonpharmacological Intervention for Chronic Back Pain.

Objective: Cognitive behavioral therapy for chronic pain (CBT-CP) has been identified as an evidence-based adjunct or alternative to opioid pain care. However, little is known about which patients participate in CBT-CP. This study examined predictors of enrollment in a noninferiority trial of in-person vs technology-based CBT-CP for patients with chronic back pain. Setting: A single Veterans Health Affairs (VHA) medical center. Subjects: Veterans with chronic back pain. Design and Methods: For eligible participants (N = 290), individual factors (demographics, distance from a VHA medical center, pain intensity, receipt of opioid prescription, and recruitment method) collected at trial screening were examined to identify predictors of enrollment (i.e., signed consent form). Of those who enrolled, duration of participation in the treatment portion of the study was examined. Results: Among eligible patients, 54% declined enrollment due to lack of interest. Regression analyses revealed that patients not in receipt of an opioid were more likely to enroll. The probability of being in the trial long enough to receive a "dose" of treatment (3 visits or more) was 0.76 (0.04). Conclusions: Overall, enrollment rates were low. However, most patients who enrolled in the study (102 of 134 signed consent) were retained and received a treatment dose. Patients not receiving opioids were more likely to enroll, suggesting that patients who are prescribed opioids, an important group for treatment outreach, are likely underengaged. Identifying predictors of enrollment in CBT-CP may help increase recruitment efficiency and assist in targeting patients who may benefit but are not currently interested in treatment.

Anesthesia Adverse Events Voluntarily Reported in the Veterans Health Administration and Lessons Learned.

BACKGROUND: Anesthesia providers have long been pioneers in patient safety. Despite remarkable efforts, anesthesia errors still occur, resulting in complications, injuries, and even death. The Veterans Health Administration (VHA) National Center of Patient Safety uses root cause analysis (RCA) to examine why system-related adverse events occur and how to prevent future similar events. This study describes the types of anesthesia adverse events reported in VHA hospitals and their root causes and preventative actions. METHODS: RCA reports from VHA hospitals from May 30, 2012, to May 1, 2015, were reviewed for root causes, severity of patient outcomes, and actions. These elements were coded by consensus and analyzed using descriptive statistics. RESULTS: During the study period, 3228 RCAs were submitted, of which 292 involved an anesthesia provider. Thirty-six of these were specific to anesthesia care. We reviewed these 36 RCA reports of adverse events specific to anesthesia care. Types of event included medication errors (28%, 10), regional blocks (14%, 5), airway management (14%, 5), skin integrity or position (11%, 4), other (11%, 4), consent issues (8%, 3), equipment (8%, 3), and intravenous access and anesthesia awareness (3%, 1 each). Of the 36 anesthesia events reported, 5 (14%) were identified as being catastrophic, 10 (28%) major, 12 (34%) moderate, and 9 (26%) minor. The majority of root causes identified a need for improved standardization of processes. CONCLUSIONS: This analysis points to the need for systemwide implementation of human factors engineering-based approaches to work toward further eliminating anesthesia-related adverse events. Such actions include standardization of processes, forcing functions, separating storage of look-alike sound-alike medications, limiting stock of high-risk medication strengths, bar coding medications, use of cognitive aids such as checklists, and high-fidelity simulation.

Implementation of Perioperative Music Using the Consolidated Framework for Implementation Research.

BACKGROUND: Complementary integrative health therapies have a perioperative role in the reduction of pain, analgesic use, and anxiety, and increasing patient satisfaction. However, long implementation lags have been quantified. The Consolidated Framework for Implementation Research (CFIR) can help mitigate this translational problem. METHODS: We reviewed evidence for several nonpharmacological treatments (CFIR domain: characteristics of interventions) and studied external context and organizational readiness for change by surveying providers at 11 Veterans Affairs (VA) hospitals (domains: outer and inner settings). We asked patients about their willingness to receive music and studied the association between this and known risk factors for opioid use (domain: characteristics of individuals). We implemented a protocol for the perioperative use of digital music players loaded with veteran-preferred playlists and evaluated its penetration in a subgroup of patients undergoing joint replacements over a 6-month period (domain: process of implementation). We then extracted data on postoperative recovery time and other outcomes, comparing them with historic and contemporary cohorts. RESULTS: Evidence varied from strong and direct for perioperative music and acupuncture, to modest or weak and indirect for mindfulness, yoga, and tai chi, respectively. Readiness for change surveys completed by 97 perioperative providers showed overall positive scores (mean >0 on a scale from -2 to +2, equivalent to >2.5 on the 5-point Likert scale). Readiness was higher at Durham (+0.47) versus most other VA hospitals (range +0.05 to +0.63). Of 3307 veterans asked about willingness to receive music, approximately 68% (n = 2252) answered "yes." In multivariable analyses, a positive response (acceptability) was independently predicted by younger age and higher mean preoperative pain scores (>4 out of 10 over 90 days before admission), factors associated with opioid overuse. Penetration was modest in the targeted subset (39 received music out of a possible 81 recipients), potentially reduced by device nonavailability due to diffusion into nontargeted populations. Postoperative recovery time was not changed, suggesting smooth integration into workflow. CONCLUSIONS: CFIR-guided implementation of perioperative music was feasible at a tertiary VA hospital, with moderate penetration in a high-risk subset of patients. Use of digital music players with preferred playlists was supported by strong evidence, tension for change, modest readiness among providers, good acceptability among patients (especially those at risk for opioid overuse), and a protocolized approach. Further study is needed to identify similar frameworks for effective knowledge-translation activities.

Risk factors of opioid-induced adverse reactions in elderly male outpatients of Korea Veterans Hospital.

BACKGROUND: Risk factors associated with opioid-induced adverse reactions (OIARs) in the elderly population have not been well defined. The objective of this study was to determine effects of various risk factors on incidence of OIARs in male elderly patients. METHODS: A retrospective cohort study in Korea Veterans Hospital was performed. Data were analyzed in male patients aged 65 years and older who received morphine, oxycodone, or codeine. Binomial variables describing patient-related and drug-related characteristics were constructed. Associations between these variables and frequency of OIARs were determined. Odds ratio (OR) and adjusted odds ratio (AOR) were calculated from univariate and multivariable analyses, respectively. Attributable risk was obtained by (1-1/OR)*100%. RESULTS: Of 316 patients, 28% experienced at least one adverse event. The most common adverse events were gastrointestinal problems (n = 59) and central nerve system adverse effects (n = 20). The odds of OIARs in patients with opioid use ≥12 weeks was increased by 80% compared to those with opioid use < 12 weeks. Attributable risk of GABA analogues was 64~78% in constructed Models. Compared to codeine users, patients using morphine and oxycodone had 653 and 473% increased odds for OIARs, respectively. MME ≥ 60 mg/day had a 317% increased odds for OIARs (95% CI: 1.92-9.04) compared to MME < 60 mg/day. Opioid combination therapy had a 139% increased odds for OIARs compared to monotherapy. CONCLUSIONS: These findings have significant implications for clinical use of opioid in elderly patients. Our study suggests that low dose short-term use will pose less risk of OIARs for the elderly, whereas concomitant use of GABA analogues, strong opioids and dual-opioid therapy may increase the risk of OIARs. Therefore, clinician should carefully monitor patients when starting opioid therapy in older population.

Patient discourse on chronic kidney disease monitoring: a qualitative study at a Veterans Affairs Renal Clinic.

BACKGROUND: Knowing how chronic kidney disease (CKD) patients talk about their encounters with providers (i.e., their discourse) can inform the important clinical goal of engaging patients in their chronic disease self-management. The aim of this study was to analyze patient discourse on ongoing CKD monitoring encounters for health communication strategies that motivate patient engagement. METHODS: Passages regarding CKD monitoring from 6 focus group transcripts on self-management with a total of 30 participants age ≥ 70 years from the Atlanta Veterans Affairs Renal Clinic across three different CKD trajectories (stable, linear decline, and non-linear) were extracted. These passages were examined using three-stage critical discourse analysis (description, interpretation, explanation) for recurring patterns across groups. RESULTS: Focus group participants were an average age of 75.1, 96.7% male, and 60% Black. Passages relating to CKD monitoring (n = 55) yielded predominantly negative communication themes. Perceived negative communication was characterized through a patient discourse of unequal exchange, whereby engaged patients would provide bodily fluids and time for appointments and continued to wait for meaningful, contextualized monitoring information from providers and/or disengaged providers who withheld that information. However, some encounters were depicted as helpful. Perceived positive communication was characterized by a patient discourse of kidney protection, whereby patients and providers collaborate in the mutual goal of preserving kidney function. CONCLUSIONS: Patient perceived an unequal exchange in CKD monitoring encounters. This perception appears rooted in a lack of easily understandable information. By accessing the positive discourse of protecting the kidneys (e.g., through eGFR level) vs. the discourse of damage (e.g., serum creatinine level), healthcare professionals can clarify the purpose of monitoring and in ways that motivate patient engagement in self-management. Patients being monitored for CKD progression may best be supported through messaging that conceptualizes monitoring as kidney protection and provides concrete contextualized information at each monitoring encounter.

Quality of relationship between veterans with traumatic brain injury and their family members.

OBJECTIVES: The quality of the relationship between patients with many illnesses and their family members has been shown to affect the well-being of both. Yet, relationship quality has not been studied in traumatic brain injury (TBI), and giving and receiving aspects have not been distinguished. The present study of veterans with TBI examined associations between relationship quality and caregiver burden, satisfaction with caregiving, and veterans' competence in interpersonal functioning, rated by veterans and family members. METHOD: In this cross-sectional study, 83 veterans and their family members were interviewed at home. Measures of quality of relationship, veterans' interpersonal competence and sociodemographics were collected for both, caregiver burden and satisfaction for family members only. RESULTS: As predicted, veteran-rated Qrel/Giving was associated with family-rated Qrel/Receiving, and veteran-rated Qrel/Receiving with family-rated Qrel/Giving. Lower caregiver burden and higher caregiving satisfaction were associated with higher Qrel/Receiving scores but not with Qrel/Giving scores. Veterans' interpersonal competence was associated with total Qrel as rated by either veterans or family members. CONCLUSIONS: Relationship quality should be included in family research in TBI, and giving and receiving aspects should be differentiated. Findings suggest that lower caregiver burden and greater satisfaction should be more achievable by increasing caregivers' sense of benefits received from the relationship.

Trends in the Use and Characteristics of Chiropractic Services in the Department of Veterans Affairs.

OBJECTIVES: The purpose of this study was to analyze national trends and key features of the Department of Veterans Affairs' (VA's) chiropractic service delivery and chiropractic provider workforce since their initial inception. METHODS: This was a serial cross-sectional analysis of the VA administrative data sampled from the first record of chiropractic services in VA through September 30, 2015. Data were obtained from VA's Corporate Data Warehouse and analyzed with descriptive statistics. RESULTS: From October 1, 2004, through September 30, 2015, the annual number of patients seen in VA chiropractic clinics increased from 4052 to 37349 (821.7%), and the annual number of chiropractic visits increased from 20072 to 159366 (693.9%). The typical VA chiropractic patient is male, is between the ages of 45 and 64, is seen for low back and/or neck conditions, and receives chiropractic spinal manipulation and evaluation and management services. The total number of VA chiropractic clinics grew from 27 to 65 (9.4% annually), and the number of chiropractor employees grew from 13 to 86 (21.3% annually). The typical VA chiropractor employee is a 45.9-year-old man, has worked in VA for 4.5 years, and receives annual compensation of $97860. VA also purchased care from private sector chiropractors starting in 2000, growing to 159533 chiropractic visits for 19435 patients at a cost of $11155654 annually. CONCLUSIONS: Use of chiropractic services and the chiropractic workforce in VA have grown substantially over more than a decade since their introduction.

Trends in prevalent and incident opioid receipt: an observational study in Veterans Health Administration 2004-2012.

BACKGROUND: Improved understanding of temporal and regional trends may support safe and effective prescribing of opioids. OBJECTIVE: We describe national, regional, and facility-level trends and variations in opioid receipt between fiscal years (FY) 2004 and 2012. DESIGN: Observational cohort study using Veterans Health Administration (VHA) administrative databases. PARTICIPANTS: All patients receiving primary care within 137 VHA healthcare systems during a given study year and receiving medications from VHA one year before and during a given study year. MAIN MEASURES: Prevalent and incident opioid receipt during each year of the study period. KEY RESULTS: The overall prevalence of opioid receipt increased from 18.9% of all veteran outpatients in FY2004 to 33.4% in FY2012, a 76.7% relative increase. In FY2012, women had higher rates of prevalent opioid receipt than men (42.4% vs. 32.9%), and the youngest veterans (18-34 years) had higher prevalent opioid receipt compared to the oldest veterans (≥ 80 years) (47.6% vs. 17.9%). All regions in the United States saw increased rates of prevalent opioid receipt during this time period. Prevalence rates varied widely by facility: in FY2012, the lowest-prescribing facility had a rate of 13.5%, and the highest of 50.8%. Annual incident opioid receipt increased from 8.8% in FY2004 to 10.2% in FY2011, with a decline to 9.8% in FY2012. Incident prescribing increased at some facilities and decreased at others. Facilities with high prevalent prescribing tended to have flat or decreasing incident prescribing rates during the study time frame. CONCLUSIONS: Rates of opioid receipt increased throughout the study time frame, with wide variation in prevalent and incident rates across geographical region, sex, and age groups. Prevalence and incidence rates reflect distinct prescribing practices. Areas with the highest prevalence tended to have lower increases in incident opioid receipt over the study period. This likely reflects facility-level variations in prescribing practices as well as baseline rates of prevalent use. Future work assessing opioid prescribing should employ methodologies to account for and interpret both prevalent and incident opioid receipt.

Association between Withholding Angiotensin Receptor Blockers in the Early Postoperative Period and 30-day Mortality: A Cohort Study of the Veterans Affairs Healthcare System.

BACKGROUND: Despite widespread use, there is limited information to guide perioperative management of angiotensin receptor blockers (ARBs). METHODS: In this retrospective cohort study, the authors evaluated the patterns of postoperative ARB use in veterans regularly prescribed ARBs admitted for noncardiac surgery at the Veterans Affairs Healthcare system between 1999 and 2011. Multivariable and propensity score-matched Cox proportional hazards models were used to determine the independent effect of failure to resume ARB by postoperative day 2 on the primary outcome of all-cause 30-day mortality. RESULTS: Out of 1,167,482 surgical admissions, 30,173 inpatient surgical admissions met inclusion criteria. Approximately 10,205 patients (33.8%) in the cohort did not resume ARB by day 2. Those that resumed ARB had a 30-day mortality rate of 1.3% (260 of 19,968), whereas 3.2% (323 of 10,205) died in the group that withheld ARB. The unadjusted hazard ratio (HR) for 30-day mortality was 2.45 (95% CI, 2.08 to 2.89; P < 0.001) for those that withheld ARB compared with those that resumed, whereas the multivariable adjusted HR was 1.74 (95% CI, 1.47 to 2.06; P < 0.001). When restricted to a propensity score-matched subset of 19,490, the HR was similar (1.47; 95% CI, 1.22 to 1.78; P < 0.001). Withholding ARB in younger patients increased mortality risk (HR = 2.52; 95% CI, 1.69 to 3.76; P < 0.001 for age <60 yr) compared with older patients (HR = 1.42; 95% CI, 1.09 to 1.85; P = 0.01 for age >75 yr). CONCLUSIONS: Postoperative delay in resuming ARB is common, particularly in patients who are frail after surgery. Withholding ARB is strongly associated with increased 30-day mortality, especially in younger patients, although residual confounding may be present.

Association between Intraoperative Hypotension and Hypertension and 30-day Postoperative Mortality in Noncardiac Surgery.

BACKGROUND: Although deviations in intraoperative blood pressure are assumed to be associated with postoperative mortality, critical blood pressure thresholds remain undefined. Therefore, the authors estimated the intraoperative thresholds of systolic blood pressure (SBP), mean blood pressure (MAP), and diastolic blood pressure (DBP) associated with increased risk-adjusted 30-day mortality. METHODS: This retrospective cohort study combined intraoperative blood pressure data from six Veterans Affairs medical centers with 30-day outcomes to determine the risk-adjusted associations between intraoperative blood pressure and 30-day mortality. Deviations in blood pressure were assessed using three methods: (1) population thresholds (individual patient sum of area under threshold [AUT] or area over threshold 2 SDs from the mean of the population intraoperative blood pressure values), (2). absolute thresholds, and (3) percent change from baseline blood pressure. RESULTS: Thirty-day mortality was associated with (1) population threshold: systolic AUT (odds ratio, 3.3; 95% CI, 2.2 to 4.8), mean AUT (2.8; 1.9 to 4.3), and diastolic AUT (2.4; 1.6 to 3.8). Approximate conversions of AUT into its separate components of pressure and time were SBP < 67 mmHg for more than 8.2 min, MAP < 49 mmHg for more than 3.9 min, DBP < 33 mmHg for more than 4.4 min. (2) Absolute threshold: SBP < 70 mmHg for more than or equal to 5 min (odds ratio, 2.9; 95% CI, 1.7 to 4.9), MAP < 49 mmHg for more than or equal to 5 min (2.4; 1.3 to 4.6), and DBP < 30 mmHg for more than or equal to 5 min (3.2; 1.8 to 5.5). (3) Percent change: MAP decreases to more than 50% from baseline for more than or equal to 5 min (2.7; 1.5 to 5.0). Intraoperative hypertension was not associated with 30-day mortality with any of these techniques. CONCLUSION: Intraoperative hypotension, but not hypertension, is associated with increased 30-day operative mortality.