Comparison of prospective risk estimates for postoperative complications: human vs computer model

BACKGROUND

Surgical quality improvement tools such as NSQIP are limited in their ability to prospectively affect individual patient care by the retrospective audit and feedback nature of their design. We hypothesized that statistical models using patient preoperative characteristics could prospectively provide risk estimates of postoperative adverse events comparable to risk estimates provided by experienced surgeons, and could be useful for stratifying preoperative assessment of patient risk.

STUDY DESIGN

This was a prospective observational cohort. Using previously developed models for 30-day postoperative mortality, overall morbidity, cardiac, thromboembolic, pulmonary, renal, and surgical site infection (SSI) complications, model and surgeon estimates of risk were compared with each other and with actual 30-day outcomes.

RESULTS

The study cohort included 1,791 general surgery patients operated on between June 2010 and January 2012. Observed outcomes were mortality (0.2%), overall morbidity (8.2%), and pulmonary (1.3%), cardiac (0.3%), thromboembolism (0.2%), renal (0.4%), and SSI (3.8%) complications. Model and surgeon risk estimates showed significant correlation (p < 0.0001) for each outcome category. When surgeons perceived patient risk for overall morbidity to be low, the model-predicted risk and observed morbidity rates were 2.8% and 4.1%, respectively, compared with 10% and 18% in perceived high risk patients. Patients in the highest quartile of model-predicted risk accounted for 75% of observed mortality and 52% of morbidity.

CONCLUSIONS

Across a broad range of general surgical operations, we confirmed that the model risk estimates are in fairly good agreement with risk estimates of experienced surgeons. Using these models prospectively can identify patients at high risk for morbidity and mortality, who could then be targeted for intervention to reduce postoperative complications.

Prevalence and predictors of injection drug use and risky sexual behaviors among adolescents in substance treatment

BACKGROUND AND OBJECTIVES

The longitudinal risk for human immunodeficiency virus (HIV) infection following adolescent substance treatment is not known. Therefore, it is not known if adolescent substance treatment should include HIV prevention interventions. To address this important research gap, this study evaluates the longitudinal prevalence and predictors of injection drug use (IDU) and sex risk behaviors among adolescents in substance treatment.

METHODS

Participants were 260 adolescents (13-18 years) in substance treatment and 201 community control adolescents (11-19 years). Participants were assessed at baseline and follow-up (mean time between assessments = 6.9 years for the clinical sample and 5.6 years for the community control sample). Outcomes included self-report lifetime history of IDU, number of lifetime sex partners and frequency of unprotected sexual intercourse.

RESULTS

At baseline, 7.5% of the clinical sample, compared to 1.0% of the community control sample had a lifetime history of IDU (χ12=10.53, p = .001). At follow-up, 17.4% of the clinical sample compared to 0% of the community control sample had a lifetime history of IDU (χ12=26.61, p = .0005). The number of baseline substance use disorders and onset age of marijuana use significantly predicted the presence of lifetime IDU at follow-up, after adjusting for baseline age, race, and sex. The clinical sample reported more lifetime sex partners and more frequent unprotected sex than the community control sample at baseline and follow-up.

CONCLUSIONS

Many adolescents in substance treatment develop IDU and report persistent risky sex. Effective risk reduction interventions for adolescents in substance treatment are needed that address both IDU and risky sex.

Conduct disorder and initiation of substance use: a prospective longitudinal study

OBJECTIVE

To examine the influence of conduct disorder (CD) on substance use initiation.

METHOD

Community adolescents without CD (n = 1,165, mean baseline age = 14.6 years), with CD (n = 194, mean baseline age = 15.3 years), and youth with CD recruited from treatment (n = 268, mean baseline age = 15.7 years) were prospectively followed and re-interviewed during young adulthood (mean ages at follow-up respectively: 20, 20.8, and 24). Young adult retrospective reports of age of substance initiation for 10 substance classes were analyzed using Cox regression analyses. Hazard ratios of initiation for the CD cohorts (community without CD as the reference) at ages 15, 18, and 21 were calculated, adjusting for baseline age, gender, and race/ethnicity.

RESULTS

Among community subjects, CD was associated with elevated adjusted hazards for initiation of all substances, with comparatively greater hazard ratios of initiating illicit substances at age 15 years. By age 18, the adjusted hazard ratios remained significant except for alcohol. At age 21, the adjusted hazard ratios were significant only for cocaine, amphetamines, inhalants, and club drugs. A substantial portion of community subjects without CD never initiated illicit substance use. Clinical youth with CD demonstrated similar patterns, with comparatively larger adjusted hazard ratios.

CONCLUSIONS

CD confers increased risk for substance use initiation across all substance classes at age 15 years, with greater relative risk for illicit substances compared to licit substances. This effect continues until age 18 years, with the weakest effect for alcohol. It further diminishes for other substances by age 21, However, the likelihood of initiating cocaine, amphetamines, inhalants and club drug use among those who have not initiated yet continues to be highly elevated by age 21.

Where do you want to spend your last days of life? Low concordance between preferred and actual site of death among hospitalized adults

BACKGROUND

Death in the U.S. frequently occurs in institutions despite the overwhelming majority of persons who state that they prefer to die at home. Little research to date has examined how well individual preferences compare to actual site of death.

OBJECTIVES

Determine the concordance between preferred and actual place of death and examine independent predictors for concordance.

DESIGN

Observational cohort study.

SETTING

Three area hospitals including a safety net hospital, veterans' hospital, and academic tertiary referral center.

PATIENTS

458 adult patients admitted to the general medical service from 2003-2005.

MEASUREMENTS

Patients were asked where they preferred to spend their last days of life. Data on date and actual site of death from 2005-2009 was collected from hospital records and death certificates.

RESULTS

The majority of patients preferred to die at home (75% n = 343). Low income and being married were significantly associated with a preference to die at home compared to nursing home or inpatient hospice (OR 2.71 95% CI 1.30-5.67 and OR 2.44 95% CI 1.14-5.21 respectively). Of the 123 patients who died during the follow up period, most (66% n = 80) died in an institutional setting. Overall concordance between preferred and actual site of death was only 37% (n = 41). Female gender was significantly associated with concordance between preferred and actual site of death (OR 3.30 95% CI 1.25-8.72).

CONCLUSIONS

Concordance between preferred and actual site of death is low and female gender was the sole patient level variable associated with concordance.

Morphological features of coronary arteries and lesions in hearts from five species of sharks collected from the northwestern Atlantic Ocean

Morphological features of coronary arteries and incidental lesions are reported from hearts in five species of sharks, the shortfin mako shark, Isurus oxyrhinchus Rafinesque, thresher shark Alopias vulpinus (Bonaterre), blue shark, Prionace glauca L., the smooth dogfish, Mustelus canis (Mitchill), and spiny dogfish, Squalus acanthias L. Sharks were collected from the northwestern Atlantic between June and August from 1996 to 2010. They were necropsied dockside and the hearts were preserved in buffered formalin. Routine sections including ventricle/conus arteriosus and the atrio-ventricular junctions were embedded in paraffin, stained with common histological and immunohistochemical methods and examined by brightfield microscopy. Myointimal hyperplasia, medial myo-myxomatous hyperplasia and bifurcation pads were observed commonly, and medial muscle reorientation and epicardial myeloid tissues were rare. All the above features differed in severity, prevalence and distribution depending on anatomical site and shark species/size. Morphometric analysis indicated that myomyxomatous hyperplasia is associated with luminal narrowing of blood vessels. As suggested previously, the described morphological features are most likely physiological responses to blood flow characteristics. Vascular and cardiac lesions were uncommon and included, granulomatous proliferative epicarditis with fibroepitheliomas, myxomatous epicardial expansions, medial arterial vacuolation, myocardial fibrosis, acute ventricular emboli and parasitic granulomas. The lesions of embolism, proliferative and granulomatous epicarditis and myocardial fibrosis were in all sharks associated with capture events including retained fishing hooks. The significance and aetiopathogenesis of medial vacuolation and epicardial myxomatous expansions remains unclear.

Toward prospective identification of high-risk surgical patients

The purpose of this study was to explore the feasibility of prospectively identifying patients at high risk for surgical complications using automatable methods focused on patient characteristics. We used data from the Michigan Surgical Quality Collaborative (60,411 elective surgeries) performed between 2003 and 2008. Regression models for postoperative mortality, overall morbidity, cardiac, thromboembolic, pulmonary, renal, and surgical site infection complications were developed using preoperative patient and planned procedure data. Risk was categorized by quartiles of predicted probability: "low" risk corresponding to the bottom quartile, "average" to the middle two quartiles, and "high" to the top quartile. C-indices were calculated to measure discrimination; model validity was assessed by cross-validation. Models were repeated using only patient characteristics. Risk category was closely related to event rates; 80 to 90 per cent of mortality and cardiac, renal, and pulmonary complications occurred among the 25 per cent of "high-risk" patients. Although thromboembolisms and surgical site infections were less predictable, 60 to 70 per cent of events occurred among high-risk patients. Cross-validation results were consistent and only slightly attenuated when predictors were restricted to patient characteristics alone. Adverse postoperative events are concentrated among patients identifiable preoperatively as high risk. Preoperative risk assessment could allow for efficient interventions targeted to high-risk patients.

Toward Prospective Identification of High-Risk Surgical Patients

The purpose of this study was to explore the feasibility of prospectively identifying patients at high risk for surgical complications using automatable methods focused on patient characteristics. We used data from the Michigan Surgical Quality Collaborative (60,411 elective surgeries) performed between 2003 and 2008. Regression models for postoperative mortality, overall morbidity, cardiac, thromboembolic, pulmonary, renal, and surgical site infection complications were developed using preoperative patient and planned procedure data. Risk was categorized by quartiles of predicted probability: “low” risk corresponding to the bottom quartile, “average” to the middle two quartiles, and “high” to the top quartile. C-indices were calculated to measure discrimination; model validity was assessed by cross-validation. Models were repeated using only patient characteristics. Risk category was closely related to event rates; 80 to 90 per cent of mortality and cardiac, renal, and pulmonary complications occurred among the 25 per cent of “high-risk” patients. Although thromboembolisms and surgical site infections were less predictable, 60 to 70 per cent of events occurred among high-risk patients. Cross-validation results were consistent and only slightly attenuated when predictors were restricted to patient characteristics alone. Adverse postoperative events are concentrated among patients identifiable preoperatively as high risk. Preoperative risk assessment could allow for efficient interventions targeted to high-risk patients.

Advance directive discussions: lost in translation or lost opportunities?

BACKGROUND

Previous studies have shown that minority populations have low rates of documented advance directives and express preferences for more life-prolonging interventions at the end of life. We sought to determine the impact of Latino ethnicity on patients' self-report of having an advance directive discussion and having a completed advance directive in the medical record at an index hospitalization for serious medical illness.

METHODS

This was a prospective observational cohort study of 458 adults admitted to the general medical services of a safety net hospital, an academic medical center, and a Veterans' Affairs (VA) hospital. Patients were asked if they had discussed advance directives, and we reviewed medical records for documented advance directives.

RESULTS

Overall, 45% of patients reported having had a discussion about advance directives (29% of Latinos compared with 54% of Caucasians, p=0.0002) and 24% of patients had a completed advance directive in their medical record (25% Latinos and 26% of Caucasians, p=not significant [ns]). Using logistic regression modeling and adjusting for socioeconomic status (SES), education level, and language spoken, Latinos (odds ratio [OR] 0.42, confidence interval [CI] 0.24-0.75) were less likely to report having advance directive discussions compared with Caucasians (referent). However, modeling of a completed advance directive in the medical record showed no significant difference between Latinos (OR 1.44, CI 0.73-2.85) and Caucasians (referent).

CONCLUSIONS

The unexpected discrepancy we found highlights the need for more effective communication in advance care planning that includes education that is culturally sensitive and accessible to persons with low health literacy.

The Feasibility of Interventions to Reduce HIV Risk and Drug Use among Heterosexual Methamphetamine Users

This paper reports on a feasibility study that examined contingency management among out-of-treatment, heterosexual methamphetamine users and the reduction of drug use and HIV risk. Fifty-eight meth users were recruited through street outreach in Denver from November 2006 through March 2007. The low sample size reflects that this was a pilot study to see if CM is feasible in an out-of-treatment, street-recruited population of meth users. Secondary aims were to examine if reductions and drug use and risk behavior could be found. Subjects were randomly assigned to contingency management (CM) or CM plus strengths-based case management (CM/SBCM), with follow-up at 4 and 8 months. Participants were primarily White (90%), 52% male and averaged 38 years old. Eighty-three percent attended at least one CM session, with 29% attending at least fifteen. All participants reduced meth use significantly at follow-up. Those who attended more sessions submitted more stimulant-free urines than those who attended fewer sessions. Participants assigned to CM/SBCM attended more sessions and earned more vouchers than clients in CM. Similarly, participants reported reduced needle-sharing and sex risk. Findings demonstrate that CM and SBCM may help meth users reduce drug use and HIV risk.

"They're going to unplug grandma": advance directive discussions and documentation do not decrease survival in patients at baseline lower risk of death

OBJECTIVE

To determine the effect of having advance directive (AD) discussions or having an AD in the medical record on patient survival.

DESIGN

Prospective observational cohort study.

SETTING

Three Colorado area hospitals: a large academic tertiary referral center, a Veteran's Affairs medical center, and an urban safety net hospital.

PARTICIPANTS

Four hundred fifty-eight adults admitted to the general internal medicine service interviewed about AD discussions. A concurrent chart review documented the presence of an AD in the medical record. Participants were stratified into low, medium, and high risk of death within 1 year based on validated prognostic criteria.

MEASURES

Kaplan-Meier survival plots were estimated for those at low and medium risk of death.

RESULTS

No significant differences in survival for participants at low and medium risk of death who reported having had an AD discussion and those who had not (Wilcoxon low risk, P = 0.97; medium risk, P = 0.28; and log-rank low risk, P = 0.82; medium risk, P = 0.45), and for those who had an AD in the medical record vs those who did not (Wilcoxon low risk, P = 0.84; medium risk, P = 0.78; and log-rank low risk, P = 0.86; medium risk, P = 0.69).

CONCLUSIONS

There is no evidence that AD discussions or documentation result in increased mortality. In regards to the current national debate about the merits of advance care planning, this study suggests that honoring patients' wishes to engage in AD discussions and documentation does not lead to harm.

Major depression and treatment response in adolescents with ADHD and substance use disorder

BACKGROUND

Major depressive disorder (MDD) frequently co-occurs in adolescents with substance use disorders (SUDs) and attention deficit hyperactivity disorder (ADHD), but the impact of MDD on substance treatment and ADHD outcomes and implications for clinical practice are unclear.

METHODS

Adolescents (n=303; ages 13-18) meeting DSM-IV criteria for ADHD and SUD were randomized to osmotic release methylphenidate (OROS-MPH) or placebo and 16 weeks of cognitive behavioral therapy (CBT). Adolescents with (n=38) and without (n=265) MDD were compared on baseline demographic and clinical characteristics as well as non-nicotine substance use and ADHD treatment outcomes.

RESULTS

Adolescents with MDD reported more non-nicotine substance use days at baseline and continued using more throughout treatment compared to those without MDD (p<0.0001 based on timeline followback; p<0.001 based on urine drug screens). There was no difference between adolescents with and without MDD in retention or CBT sessions attended. ADHD symptom severity (based on DSM-IV ADHD rating scale) followed a slightly different course of improvement although with no difference between groups in baseline or 16-week symptom severity or 16-week symptom reduction. There was no difference in days of substance use or ADHD symptom outcomes over time in adolescents with MDD or those without MDD treated with OROS-MPH or placebo. Depressed adolescents were more often female, older, and not court ordered.

CONCLUSIONS

These preliminary findings suggest that compared to non-depressed adolescents with ADHD and SUD, those with co-occurring MDD have more severe substance use at baseline and throughout treatment. Such youth may require interventions targeting depression.

Using telehealth to provide diabetes care to patients in rural Montana: findings from the promoting realistic individual self-management program

OBJECTIVE

The objectives of this study were to demonstrate the feasibility of telehealth technology to provide a team approach to diabetes care for rural patients and determine its effect on patient outcomes when compared with face-to-face diabetes visits.

MATERIALS AND METHODS

An evaluation of a patient-centered interdisciplinary team approach to diabetes management compared telehealth with face-to-face visits on receipt of recommended preventive guidelines, vascular risk factor control, patient satisfaction, and diabetes self-management at baseline and 1, 2, and 3 years postintervention.

RESULTS

One-year postintervention the receipt of recommended dilated eye exams increased 31% and 43% among telehealth and face-to-face patients, respectively (p=0.28). Control of two or more risk factors increased 37% and 69% (p=0.21). Patient diabetes care satisfaction rates increased 191% and 131% among telehealth and face-to-face patients, respectively (p=0.51). A comparison of telehealth with face-to-face patients resulted in increased self-reported blood glucose monitoring as instructed (97% vs. 89%; p=0.63) and increased dietary adherence (244% vs. 159%; p=0.86), respectively. Receipt of a monofilament foot test showed a significantly greater improvement among face-to-face patients (17% vs. 35%; p=0.01) at 1 year postintervention, but this difference disappeared in years 2 and 3.

CONCLUSIONS

Telehealth proved to be an effective mode for the provision of diabetes care to rural patients. Few differences were detected in the delivery of a team approach to diabetes management via telehealth compared with face-to-face visits on receipt of preventive care services, vascular risk factor control, patient satisfaction, and patient self-management. A team approach using telehealth may be a viable strategy for addressing the unique challenges faced by patients living in rural communities.

Cigarette and cannabis use trajectories among adolescents in treatment for attention-deficit/hyperactivity disorder and substance use disorders

BACKGROUND

Cigarette smoking is common in adolescents with attention-deficit/hyperactivity disorder (ADHD) and substance use disorders (SUD). However, little is known about the relationship between cigarette and cannabis use trajectories in the context of treatment for both ADHD and SUD. To address this research gap, we report collateral analyses from a 16-week randomized, controlled trial (n=303) of osmotic-release methylphenidate (OROS-MPH) in adolescents with ADHD concurrently receiving cognitive behavioral therapy (CBT) targeting non-nicotine SUD.

METHODS

Participants completed cigarette and cannabis use self-report at baseline and throughout treatment. Analyses were performed to explore the relationships between cigarette smoking, cannabis use, and other factors, such as medication treatment assignment (OROS-MPH versus placebo).

RESULTS

Baseline (pre-treatment) cigarette smoking was positively correlated with cannabis use. Negligible decline in cigarette smoking during treatment for non-nicotine SUD was observed in both medication groups. Regular cigarette and cannabis users at baseline who reduced their cannabis use by >50% also reduced cigarette smoking (from 10.8±1.1 to 6.2±1.1 cigarettes per day).

CONCLUSIONS

Findings highlight the challenging nature of concurrent cannabis and cigarette use in adolescents with ADHD, but demonstrate that changes in use of these substances during treatment may occur in parallel.

Telemedicine and the mini-mental state examination: assessment from a distance

The objective of this study was to determine the reliability of the Mini-Mental State Examination (MMSE) administration via telehealth with a focus on the auditory and visual test components. Reliability was assessed through use of an in-person collaborator and by assessment of faxed test copies. The MMSE was administered via telehealth with the assistance of a face-to-face collaborator. Patient responses were recorded by both the remote and in-person nurse and compared item by item; total scores for each subject were also compared. Visual items were assessed through a blinded separate scoring of a faxed copy. Percent agreement per item and total score were calculated and correlations between scores were determined by Pearson correlation coefficients. Mean score differences and associated 95% confidence intervals were calculated. Eighty percent of individual items demonstrated remote to in-person agreement of >95% and all items were >85.5% in agreement. Pearson correlation coefficients demonstrated high correlations (>0.86) between 80% of the items examined. Mean differences in scored test items were not significantly different from zero. This study demonstrates the utility of using telehealth for cognitive assessment by MMSE. It supports the use of telehealth to improve healthcare access among patients for whom distance, cost, and mobility are potential barriers to attending face-to-face clinical visits. Continued validation and reliability testing is warranted to ensure that all healthcare provided via telehealth maintains an equal quality level to that of in-person care.

An outreach intervention increases bone densitometry testing in older women

OBJECTIVES

To evaluate the performance of a patient recall intervention that relies on an outreach coordinator with a bachelor's degree to prompt women by mail and telephone about their eligibility for bone densitometry (dual-energy X-ray absorptiometry (DXA)) screening and allow them to schedule an examination without a medical provider visit ahead of time.

DESIGN

Observational.

SETTING

Academic general internal medicine practice.

INTERVENTION

Mail- and telephone-based patient recall for DXA.

PARTICIPANTS

Five hundred sixty-four women aged 65 to 79 at average risk for osteoporosis without a history of DXA.

MEASUREMENTS

Rates of DXA completion and the change in proportion of screened women during a 7-month intervention period, case finding for clinically significant bone loss, frequency of appropriate clinical follow-up, DXA no-show rates compared with usual care, and clinician satisfaction.

RESULTS

Through patient recall, rates of DXA screening rose significantly (P<.001), and the proportion of the eligible clinic population screened increased 13%. Thirty percent of patients had clinically significant bone loss, with almost all of these receiving follow-up. DXA no-show rates were comparable with usual care, and provider acceptance was high.

CONCLUSION

A patient recall intervention substantially increased DXA screening, allowing pharmacological therapy to be started much earlier in some women with significant bone loss. It imposed minimal burden on providers and enhanced patient convenience. This type of program may have utility for additional preventive services.

Progression of tremor and ataxia in male carriers of the FMR1 premutation

Premutation alleles of the fragile X mental retardation 1 (FMR1) gene give rise to a late-onset movement disorder, fragile X-associated tremor/ataxia syndrome (FXTAS), characterized by progressive intention tremor and gait ataxia, with associated dementia and global brain atrophy. The natural history of FXTAS is largely unknown. To address this issue, a family-based, retrospective, longitudinal study was conducted with a cohort of 55 male premutation carriers. Analysis of the progression of the major motor signs of FXTAS, tremor and ataxia, shows that tremor usually occurs first, with median onset at approximately 60 years of age. From the onset of the initial motor sign, median delay of onset of ataxia was 2 years; onset of falls, 6 years; dependence on a walking aid, 15 years; and death, 21 years. Preliminary data on life expectancy are variable, with a range from 5 to 25 years.

The care transitions intervention: results of a randomized controlled trial

BACKGROUND

Patients with complex care needs who require care across different health care settings are vulnerable to experiencing serious quality problems. A care transitions intervention designed to encourage patients and their caregivers to assert a more active role during care transitions may reduce rehospitalization rates.

METHODS

Randomized controlled trial. Between September 1, 2002, and August 31, 2003, patients were identified at the time of hospitalization and were randomized to receive the intervention or usual care. The setting was a large integrated delivery system located in Colorado. Subjects (N = 750) included community-dwelling adults 65 years or older admitted to the study hospital with 1 of 11 selected conditions. Intervention patients received (1) tools to promote cross-site communication, (2) encouragement to take a more active role in their care and to assert their preferences, and (3) continuity across settings and guidance from a "transition coach." Rates of rehospitalization were measured at 30, 90, and 180 days.

RESULTS

Intervention patients had lower rehospitalization rates at 30 days (8.3 vs 11.9, P = .048) and at 90 days (16.7 vs 22.5, P = .04) than control subjects. Intervention patients had lower rehospitalization rates for the same condition that precipitated the index hospitalization at 90 days (5.3 vs 9.8, P = .04) and at 180 days (8.6 vs 13.9, P = .046) than controls. The mean hospital costs were lower for intervention patients ($2058) vs controls ($2546) at 180 days (log-transformed P = .049).

CONCLUSION

Coaching chronically ill older patients and their caregivers to ensure that their needs are met during care transitions may reduce the rates of subsequent rehospitalization.

A practical tool to identify patients who may benefit from a palliative approach: the CARING criteria

Palliative care is often offered only late in the course of disease after curative measures have been exhausted. To provide timelier symptom management, advance care planning, and spiritual support, we propose a simple set of prognostic criteria that identifies persons near the end of life. In this retrospective cohort study of five prognostic indicators, the CARING criteria (Cancer, Admissions > or = 2, Residence in a nursing home, Intensive care unit admit with multiorgan failure, > or = 2 Noncancer hospice Guidelines), logistic regression modeling demonstrated high sensitivity and specificity for mortality at 1 year (c statistic > 0.8). A simple set of clinically relevant criteria applied at the time of hospital admission can identify seriously ill persons who have a high likelihood of death in 1 year and, therefore, may benefit the most from incorporating palliative measures into the plan of care.

Gender mix in twins and fetal growth, length of gestation and adult cancer risk

This study evaluated the effect of gender mix (the gender combinations of twin pairs) on fetal growth and length of gestation, and reviewed the literature on the long-term effects of this altered fetal milieu on cancer risk. In singletons, it is well established that females weigh less than males at all gestations, averaging 125-135 g less at full term. This gender difference is generally believed to be the result of the effect of androgens on fetal growth. The gender difference in fetal growth is greater before the third trimester and less towards term, with males growing not only more, but also earlier than females. Plurality is a known risk factor for reduced fetal growth and birthweight. Compared with singletons, the mean birthweight percentiles of twins fall substantially (by 10% or more) below the singleton 10th percentile by 28 weeks, below the singleton 50th percentile by 30 weeks, and below the singleton 90th percentile by 34 weeks. In unlike-gender twin pairs, it has been reported that the female prolongs gestation for her brother, resulting in a higher birthweight for the male twin than that of like-gender male twins. Other researchers have demonstrated that females in unlike-gender pairs had higher birthweights than females in like-gender pairs. Analyses from our consortium on 2491 twin pregnancies with known chorionicity showed longer gestations and faster rates of fetal growth in both males and females in unlike-gender pairs compared with like-gender male or female pairs, although these differences were not statistically significant. The post-natal effects for females growing in an androgenic-anabolic environment include increased sensation-seeking behaviour and aggression, lowered visual acuity, more masculine attitudes and masculinising effects of the auditory system and craniofacial growth. In contrast, there is no evidence to suggest that there might be a similar feminising effect on males from unlike-gender pairs. This hormonal exposure in utero may influence adult body size and susceptability to breast cancer.

A new tool for identifying discrepancies in postacute medications for community-dwelling older adults

BACKGROUND

Despite a national focus on the problem of medication safety, few studies have examined the frequency, causes, and factors contributing to discrepancies between the medications prescribed in acute care settings and what elderly patients (age>or=65 years) actually take after their discharge.

OBJECTIVE

The aims of this study were to develop a new instrument, the Medication Discrepancy Tool (MDT), for use by multiple practitioners across the continuum of care and to assess the MDT's reliability among nurses, pharmacists, and physicians, all of whom play a part in the formulation and administration of medication regimens for patients in transition.

METHODS

The study was conducted in a vertically integrated health care system and at a geriatric clinic in an academic health center. We applied the MDT to a series of 20 clinical vignettes based on actual cases involving older patients discharged from a community hospital to home. The interrater reliability of the MDT was assessed by asking clinicians (2 home health care nurses, 2 doctoral-trained geriatric pharmacists, and 2 physicians) to use this tool to rate the clinical vignettes. Reliability comparisons were then made within and across clinical disciplines. Intrarater reliability was also determined.

RESULTS

Across all 3 clinical disciplines, the mean interrater reliability (kappa) for the 20 vignettes was 0.56 (15% low agreement, 80% good agreement, and 5% excellent agreement). Within disciplines, the kappa statistic was as follows: nurses, 0.68; pharmacists, 0.50; and physicians, 0.64. Intrarater reliability ranged from 0.58 to 0.69.

CONCLUSIONS

By capturing transition-related medication discrepancies, the MDT fills an important gap in national efforts to promote patient safety. MDT items are actionable at both the patient and system level, suggesting that this tool could be used to foster continuous quality improvement efforts.

Preparing patients and caregivers to participate in care delivered across settings: the Care Transitions Intervention

OBJECTIVES

To test whether an intervention designed to encourage older patients and their caregivers to assert a more active role during care transitions can reduce rehospitalization rates.

DESIGN

Quasi-experimental design whereby subjects receiving the intervention (n=158) were compared with control subjects derived from administrative data (n=1,235).

SETTING

A large integrated delivery system in Colorado.

PARTICIPANTS

Community-dwelling adults aged 65 and older admitted to the study hospital with one of nine selected conditions.

INTERVENTION

Intervention subjects received tools to promote cross-site communication, encouragement to take a more active role in their care and assert their preferences, and continuity across settings and guidance from a transition coach.

MEASUREMENTS

Rates of postdischarge hospital use at 30, 60, and 90 days. Intervention subjects' care experience was assessed using the care transitions measure.

RESULTS

The adjusted odds ratio comparing rehospitalization of intervention subjects with that of controls was 0.52 (95% confidence interval (CI)=0.28-0.96) at 30 days, 0.43 (95% CI=0.25-0.72) at 90 days, and 0.57 (95% CI=0.36-0.92) at 180 days. Intervention patients reported high levels of confidence in obtaining essential information for managing their condition, communicating with members of the healthcare team, and understanding their medication regimen.

CONCLUSION

Supporting patients and caregivers to take a more active role during care transitions appears promising for reducing rates of subsequent hospitalization. Further testing may include more diverse populations and patients at risk for transitions who are not acutely ill.