The phenotypical implications of immune dysregulation in fragile X syndrome.

BACKGROUND AND PURPOSE: Immune system dysfunction and inflammatory dysregulation have been shown in several animal models of fragile X syndrome (FXS). However, the phenotypical implications of this dysregulation have not been systematically evaluated in a large patient cohort. METHODS: Five thousand seven hundred thirty-six FXS patients from a nationwide health insurance database were identified and compared to 573 600 age- and sex-matched controls. The phenome-wide association studies codes of FXS patients and those without FXS were compared and the false discovery rate was controlled at 0.05 using the Benjamini-Hochberg procedure. RESULTS: In addition to the commonly reported comorbidities of FXS, an over-representation of infectious diseases, including otitis media, cellulitis and abscess of fingers or toes, viral enteritis, candidiasis and pneumonia, was discovered. In addition, there was an under-representation of autoimmune disorders in FXS patients. CONCLUSIONS: Our systematic comorbidity analyses identified immunologically-based phenotypes associated with FXS. Our findings align with previous observations of compromised immunity and phagocytic defects in animal models of FXS. These results suggest the importance of immune-related pathways in FXS patients and their relevance to the FMR1 gene.

Digitizing clinical trials.

Clinical trials are a fundamental tool used to evaluate the efficacy and safety of new drugs and medical devices and other health system interventions. The traditional clinical trials system acts as a quality funnel for the development and implementation of new drugs, devices and health system interventions. The concept of a "digital clinical trial" involves leveraging digital technology to improve participant access, engagement, trial-related measurements, and/or interventions, enable concealed randomized intervention allocation, and has the potential to transform clinical trials and to lower their cost. In April 2019, the US National Institutes of Health (NIH) and the National Science Foundation (NSF) held a workshop bringing together experts in clinical trials, digital technology, and digital analytics to discuss strategies to implement the use of digital technologies in clinical trials while considering potential challenges. This position paper builds on this workshop to describe the current state of the art for digital clinical trials including (1) defining and outlining the composition and elements of digital trials; (2) describing recruitment and retention using digital technology; (3) outlining data collection elements including mobile health, wearable technologies, application programming interfaces (APIs), digital transmission of data, and consideration of regulatory oversight and guidance for data security, privacy, and remotely provided informed consent; (4) elucidating digital analytics and data science approaches leveraging artificial intelligence and machine learning algorithms; and (5) setting future priorities and strategies that should be addressed to successfully harness digital methods and the myriad benefits of such technologies for clinical research.

Effect of environmental factors on the spatio-temporal patterns of influenza spread.

Although spatio-temporal patterns of influenza spread often suggest that environmental factors play a role, their effect on the geographical variation in the timing of annual epidemics has not been assessed. We examined the effect of solar radiation, dew point, temperature and geographical position on the city-specific timing of epidemics in the USA. Using paediatric in-patient data from hospitals in 35 cities for each influenza season in the study period 2000-2005, we determined 'epidemic timing' by identifying the week of peak influenza activity. For each city we calculated averages of daily climate measurements for 1 October to 31 December. Bayesian hierarchical models were used to assess the strength of association between each variable and epidemic timing. Of the climate variables only solar radiation was significantly related to epidemic timing (95% CI -0.027 to -0.0032). Future studies may elucidate biological mechanisms intrinsically linked to solar radiation that contribute to epidemic timing in temperate regions.

Effect of computed tomography on patient management and costs in children with suspected appendicitis.

OBJECTIVE: Children evaluated in the emergency department for possible appendicitis are often admitted for observation, despite the widespread availability of accurate diagnostic studies, particularly computed tomography (CT). We sought to establish effective and efficient strategies for using CT to diagnose and manage children with possible appendicitis. DESIGN: Retrospective chart review and decision analysis. Setting. Emergency department of a large, urban tertiary care pediatric teaching hospital. PATIENTS: All patients admitted from January 1996 to August 1997 for suspected appendicitis. METHOD OF ANALYSIS: Three modeled strategies were empirically applied to the retrospective cohort of patients admitted for observation. Outcomes and costs under the modeled strategies were compared with those under current practice. The three strategies were: 1) to obtain CT scans on all patients and discharge those with normal findings; 2) to obtain CT scans and admit all patients; 3) to selectively obtain CT scans on those patients with a peripheral white blood cell count >10 000/mm(3) (10 x 10(9)/L) and admit all. The sensitivity and specificity of CT for diagnosing appendicitis were determined empirically from the data. A sensitivity analysis was performed. MAIN OUTCOME MEASURES: The number of preoperative inpatient observation days, total hospital costs, and the rates of both missed appendicitis and negative laparotomies. RESULTS: Of 609 patients hospitalized for possible appendicitis, 287 went directly to the operating room and 14 patients had known perforation and abscess. Three hundred eight children were observed and comprised the study cohort. Of the cohort, 112 (36.4%) underwent appendectomy and 26 (23.2%) of these had a normal appendix at pathology. Three patients were discharged from the hospital after observation and were subsequently readmitted with appendicitis (missed appendicitis). Among the 75 patients who had CT performed, the sensitivity and specificity of CT were both 97%. Under the current practice strategy, the cohort collectively accumulated 487 inpatient observation days and incurred a per patient cost of $5831. All three CT strategies would have reduced the total number of inpatient observation days, operations, negative laparotomies, as well as the per patient cost. The strategy of obtaining CT scans on all patients and then admitting them had the lowest rate of missed appendicitis. The additional cost of preventing each case of missed appendicitis under this strategy compared with the strategy of obtaining CT scans and sending home those with negative findings was $150,304. Even at the lowest reported sensitivity and specificity of CT in the literature, the ordering of the three strategies remained constant and continued to reduce total cost per patient. CONCLUSION: Compared with current practice, diagnostic strategies using CT could reduce costs and improve diagnosis, management, and outcomes for children with appendicitis.

Growth and determinants of access in patient e-mail and Internet use.

OBJECTIVES: To measure the rate of access to and use of the Internet and e-mail, to determine sociodemographic predictors of access, and to measure the change in Internet and e-mail access over a 1-year interval. DESIGN: Survey study. Comparison of data with those from a similar survey from 1998. SETTING: Emergency department of a large urban pediatric teaching hospital. PARTICIPANTS: Primary caretakers of pediatric patients or the patients themselves if aged 16 years or older. MAIN OUTCOME MEASURES: Use of and access to the Internet or e-mail. RESULTS: We surveyed 214 individuals: 72.8% use or have access to the Internet, e-mail, or both, an increase from 52.2% in the 1998 survey (P<.001), and 48.5% regularly use the Internet or e-mail, compared with 43.1% in 1998 (P = .32). Outside the home, access is primarily at work (52.2%), schools (8.9%), public libraries (11.5%), and friends' and relatives' houses (16.7%). Internet use and access are linearly correlated with income (r = 0.43; P<.001). White patients are more likely to have access (odds ratio, 2.6; 95% confidence interval, 1.3-5.4; P<.001) than black or Asian patients, whereas those of Hispanic ethnicity are less likely to have access (odds ratio, 0.20; 95% confidence interval, 0.09-0.43; P<.001). However, after adjustment for race and Hispanic ethnicity, only income was a significant predictor of family access to the Internet and e-mail. CONCLUSIONS: During the past year, many patients have gained access to the Internet and e-mail, although rates of regular use have remained steady. This access is often from outside the home. Furthermore, access is directly related to income and is unevenly distributed across racial and ethnic groups.

The spontaneous passage of esophageal coins in children.

OBJECTIVES: To determine the likelihood of spontaneous passage of esophageal coins to the stomach in children and to determine the effect of initial coin location on spontaneous passage. DESIGN: Retrospective review of medical records and radiographs. SUBJECTS: Consecutive patients 18 years or younger presenting during a 24-month period (October 1995 to September 1997) whose evaluation revealed an esophageal coin. SETTING: The emergency department of a large, urban academic children's hospital. MAIN OUTCOME MEASURES: Independent measures were time between ingestion and radiographs, initial location of the coin, and categorization of case as "simple" (patients without a history of esophageal disease or surgery, with a single esophageal coin lodged less than 24 hours, and with no respiratory compromise on presentation) or "complex." Dependent measures were spontaneous passage of the coin to the stomach and the time to passage. RESULTS: A total of 116 cases were included in the analysis, of which 84 were simple and 32 complex. Among the 84 simple cases, the coin was initially located in the proximal third of the esophagus in 54 (64%), the middle third in 7 (8%), and the distal third in 22 (26%). For the 32 complex cases, the initial location of the coin was the proximal third of the esophagus in 27 (84%) and the middle third in 5 (16%). Subsequent radiographs were obtained in the emergency department in 58 (69%) of the simple cases. Among these cases, spontaneous passage of the coin to the stomach occurred in 16 (28% [95% confidence interval, 21%-41%]). By initial coin location, spontaneous passage in this group occurred in 22% (7/32) of proximal, 33% (2/6) of middle, and 37% (7/19) of distal esophageal coins (P >.05). Subsequent radiographs were obtained in 14 (44%) of the complex cases; no coin had passed spontaneously to the stomach in these patients (0% [95% confidence interval, 0%-20%]). CONCLUSIONS: Children with a single esophageal coin seen within 24 hours of ingestion, who have no history of esophageal disease and no respiratory compromise on presentation, have a 28% chance of spontaneous passage of the coin to the stomach. Coins in the upper as well as the lower esophagus pass spontaneously. Observing these children for 12 to 24 hours prior to invasive procedures will reduce complications and costs.

Maternal and infant health: effects of moderate reductions in postpartum length of stay.

BACKGROUND: The Newborns' and Mothers' Health Protection Act of 1996 prohibits payers from restricting "benefits for any hospital length of stay in connection with childbirth for the mother or newborn child, following a normal vaginal delivery, to less than 48 hours." The law recognizes the basic right of women and physicians to make decisions about aptness of discharge timing. OBJECTIVE: To provide data as a basis for decisions about aptness of discharge timing by studying the effect of voluntary, moderate reductions in length of postpartum hospital stay on an array of maternal and infant health outcomes. DESIGN: A prospective cohort study. Patients were surveyed by telephone at 3 and 8 weeks postpartum. SETTING: A teaching hospital where 38% of the patients are in a managed care health plan with a noncompulsory reduced stay program offering enhanced prepartum and postpartum services, including home visits. PATIENTS: Consecutive mothers discharged after vaginal delivery during a 3-month period. MAIN OUTCOME MEASURES: The outcomes were health services use within 21 days, breast-feeding, depression, sense of competence, and satisfaction with care. Multivariate analyses adjusted for sociodemographic factors, payer status, services, and social support. RESULTS: Of 1364 eligible patients, 1200 (88%) were surveyed at 3 weeks; of these 1200, 1015 (85%) were resurveyed at 8 weeks. The mean length of stay was 41.9 hours (SD, 12.2 hours). Of patients going home in 30 hours or less, 60.8% belonged to a managed care health plan. The length of stay was not related to the outcomes, except that women hospitalized shorter than 48 hours had more emergency department visits than those staying 40 to 48 hours (adjusted odds ratio, 5.78; 95% confidence interval, 1.19-28.05). CONCLUSIONS: When adequate postpartum outpatient care is accessible, a moderately shorter length of postpartum stay after an uncomplicated vaginal delivery had no adverse effect on an array of outcomes. Researchers and policy makers should seek to better define the content of postpartum services necessary for achieving optimal outcomes for women and newborns; funding should be available to provide such services, regardless of the setting in which they are provided.

Infant health care use and maternal depression.

OBJECTIVE: To determine whether women who frequently bring their neonates for problem-oriented primary care visits or emergency department visits are at elevated risk of having depressive symptoms. DESIGN: Analysis of 2 prospective cohort studies of mothers and their infants: (1) a telephone interview study of mothers and infants after birth at an urban teaching hospital (the hospital cohort) and (2) the 1988 National Maternal and Infant Health Survey, a nationally representative sample of women who had live births in 1988. PARTICIPANTS: A total of 1015 women in the hospital cohort surveyed at 3 and 8 weeks post partum and 6779 women with data from the national survey. MAIN OUTCOME MEASURE: Depressive symptoms above the Center for Epidemiologic Studies Depression Scale cutoff score of 15. RESULTS: After controlling for sociodemographic variables and parity, women exhibited high levels of depressive symptoms if their infants had more than 1 problem-oriented primary care visit (hospital cohort: odds ratio, 2.0 [95% confidence interval, 1.1-4.3]; national survey cohort: odds ratio, 2.0 [95% confidence interval, 1.5-3.0]). Women were more likely to have high levels of depressive symptoms if their infants had even 1 emergency department visit (hospital cohort: odds ratio, 3.2 [95% confidence interval, 1.5-6.9]). Frequent well-child visits were not associated with maternal depressive symptoms. CONCLUSIONS: Neonatal health care use patterns predict women at risk for postpartum depression. Recognition of these signature patterns of service use by pediatric health care providers may facilitate early diagnosis and treatment of postpartum depression and improve outcomes for women and their families.

The personal internetworked notary and guardian.

In this paper, we propose a secure, distributed and scaleable infrastructure for a lifelong personal medical record system. We leverage on existing and widely available technologies, like the Web and public-key cryptography, to define an architecture that allows patients to exercise full control over their medical data. This is done without compromising patients' privacy and the ability of other interested parties (e.g. physicians, health-care institutions, public-health researchers) to access the data when appropriately authorized. The system organizes the information as a tree of encrypted plain-text XML files, in order to ensure platform independence and durability, and uses a role-based authorization scheme to assign access privileges. In addition to the basic architecture, we describe tools to populate the patient's record with data from hospital databases and the first testbed applications we are deploying.

The role and impact of research agendas on the comparative-effectiveness research among antihyperlipidemics.

Although it is well established that funding source influences the publication of clinical trials, relatively little is known about how funding influences trial design. We examined a public trial registry to determine how funding source shapes trial design among trials involving antihyperlipidemics. We used an automated process to identify and analyze 809 trials from a set of 72,564. Three networks representing industry-, collaboratively, and non-industry-funded trials were constructed. Each network comprised 18 drugs as nodes connected according to the number of comparisons made between them. The results indicated that industry-funded trials were more likely to compare across drugs and examine dyslipidemia as a condition, and less likely to register safety outcomes. The source of funding for clinical trials had a measurable effect on trial design, which helps quantify differences in research agendas. Improved monitoring of current clinical trials may be used to more closely align research agendas to clinical needs.

Four strategies for the management of esophageal coins in children.

OBJECTIVE: To compare clinical outcomes and costs under 4 strategies for the management of esophageal coins in children. METHODS: We developed a decision analysis model of 4 possible strategies for managing esophageal coins: 1) endoscopic removal under general anesthesia; 2) esophageal bougienage, 3) an outpatient 12- to 24-hour observation period to allow spontaneous coin passage; and 4) an inpatient observation period. Probabilities of success and complication rates for endoscopy and esophageal bougienage were obtained from published data. The probability of spontaneous coin passage was derived from chart review data at our institution. Costs were calculated from charges using a cost-to-charge ratio of.72. Hypothetical patients included in the model were those with a single esophageal coin presenting within 24 hours of ingestion, with no respiratory compromise on presentation and with no previous history of esophageal disease. Strategy-specific outcomes were overall complication rate and total cost in dollars per patient. Sensitivity analyses were performed to account for variations in the data. RESULTS: The esophageal bougienage strategy resulted in no complications and a total cost per patient of $382, which represents a marginal advantage of $2915 per patient compared with the endoscopic removal strategy. On sensitivity analysis over the range of success and complication rates of bougienage, this strategy maintained a considerable decrease in both overall complications and total cost per patient compared with all other strategies. Both outpatient and inpatient observation strategies had overall complication rates of 4.2% compared with the complication rate of 5.8% for the endoscopy strategy. The total cost per patient under these strategies was $2439 for the outpatient and $3141 for the inpatient strategy, representing a marginal advantage of $858 and $156 per patient, respectively, compared with the endoscopy strategy. Both observation strategies maintained a lower overall complication rate compared with endoscopy in the sensitivity analysis. The outpatient observation strategy maintained a marginal advantage of $645 to $1257 per patient compared with endoscopy; however, the inpatient observation strategy total cost per patient surpassed that of endoscopy at a spontaneous passage rate <23%. CONCLUSIONS: Given the high success and low complication rates reported for esophageal bougienage, substantial savings in overall complications and costs would be expected with the use of this procedure. With spontaneous passage rates >23%, either an outpatient or an inpatient observation strategy would reduce costs and complications, compared with endoscopic removal of all esophageal coins.

Data quality and the electronic medical record: a role for direct parental data entry.

INTRODUCTION: The paper and electronic medical record (EMR) have evolved with little scientific inquiry into what effect the informant (clinician or patient) has on the validity of the recorded information. We have previously reported on an electronic interview program that facilitated parents' direct reporting of past medical history data. We sought to define additional data elements that parents could report electronically and to compare parents' electronically entered data to that charted by physicians using the current EMR system. METHODS: A convenience sample of parents was recruited to enter data on history of present illness (HPI) and review of systems (ROS) elements using an electronic interview. Data from the electronic parental interview and information abstracted from the physician EMR were compared to data derived from a face-to-face criterion standard interview. Validity, sensitivity and specificity of each mode of data entry were calculated. RESULTS: 100 of 140 eligible parents (71.4%) participated. Validity of information from the electronic interview was comparable to that charted by emergency physicians for HPI regarding fever and ROS questions. Sensitivity of parents' electronic interview was superior to physicians' charting for ROS elements specific to hydration status. CONCLUSIONS: Improved sensitivity for detection of historical risk factors for illness can be achieved by augmenting the pediatric EMR with a section for direct parental direct data input. Direct parental data input to the EMR should be considered to improve the quality of documentation for medical histories.

Healthconnect: clinical grade patient-physician communication.

A critical mass of Internet users is leading to a wide diffusion of electronic communications within medical practice. Unless implemented with substantial forethought, these new technological linkages could disturb delicate balances in the doctor-patient relationship, threaten the privacy of medical information, widen social disparity in health outcomes, and even function as barriers to access. The American Medical Informatics Association (AMIA) recently published recommendations to guide computer-based communications between clinicians and patients. This paper describes the motivations for and the design of HealthConnect, a web-based patient-doctor communications tool currently in use at Children's Hospital, Boston. Structural and process-oriented features of HealthConnect, as they relate to promotion of adherence with the Guidelines, are discussed.

Incidence of bacteremia in infants and children with fever and petechiae.

OBJECTIVE: We determined the incidence of serious invasive bacteremia caused by Neisseria meningitidis and other organisms in febrile infants and children with a petechial rash. Further, we studied the diagnostic value of laboratory and clinical finding in these patients. STUDY DESIGN: We conducted this prospective cohort study in the emergency department of an urban pediatric teaching hospital, during an 18-month period, and enrolled consecutive patients with temperature of 38 degrees C or higher and petechiae. Our measures included (1) laboratory tests (leukocyte count, coagulation profile, blood culture, and cerebrospinal fluid bacterial culture); (2) a questionnaire requesting clinical data including general appearance, number and location of petechiae, and presence or absence of purpura; and (3) a follow-up telephone survey documenting health status. RESULTS: A total of 411 patients were enrolled, with 57.7% between 3 and 36 months of age. Eight patients (1.9%) had bacteremia or clinical sepsis. Six had serious invasive bacteremia: N. meningitidis (two patients), group A streptococcus (one), or sepsis with negative culture results (three). Two had occult bacteremia caused by Streptococcus pneumoniae and no evidence of sepsis. No patient had a positive cerebrospinal fluid culture result. None of the 357 well-appearing patients (95% confidence interval: 0.0%, 1.0%) had serious invasive bacteremia. Fifty-three patients appeared ill, including all six with serious invasive bacteremia. Ill appearance of the child had a sensitivity of 1.00 (95% confidence interval: 0.60, 1.00), and a leukocyte count of 15,000 or greater, or of less than 5000, had a sensitivity of 1.0 (95% confidence interval: 0.53, 1.00) for detecting serious invasive bacteremia. All children with meningococcemia had purpura. CONCLUSIONS: Invasive bacteremia occurred less frequently in our study than in previous series and was identified by clinical criteria. Our data support the treatment of selected well-appearing children with fever and petechiae as outpatients.

Social equity and access to the World Wide Web and E-mail: implications for design and implementation of medical applications.

INTRODUCTION: The distribution and types of Internet connectivity will determine the equity of access by patient populations to emerging health technologies. We sought to measure the rates, types, and predictors of access in a patient population targeted for Web-based medical services. METHODS: Design. Cross sectional in-person interview. Setting. Emergency department of a large urban pediatric teaching hospital. Subjects. Primary caretakers of patients or patients at least 16 years old. Procedure and measures. Subjects were asked about access to e-mail and the Internet as well as about willingness to use and concerns about Web-based services. Views of equity and access and sociodemographic data were also elicited. RESULTS: 132 subjects were enrolled in the study. Of respondents, 67.2% use a computer and 36.4% can access the Internet or e-mail from home. Including Internet connections and/or e-mail accounts at work, school and public libraries, 50.7% of the sample has access. Forty percent of families have e-mail accounts. The rate at which families have connectivity is primarily correlated with income (r = 0.6, p < 0.01). At all income levels, rates of access to the World Wide Web are higher than to e-mail. White patients are much more likely to have e-mail (OR 5.0, 95% CI 2.4-10.8) and Web access (OR 3.6, 95% CI 1.7-7.5). CONCLUSIONS: Connectivity is directly correlated with income and distributed unevenly across racial and ethnic groups. World Wide Web access is more prevalent than e-mail accounts, and both are often obtained outside the home. Design of health applications should account for these attributes of patient access.

Electronic patient-physician communication: problems and promise.

A critical mass of Internet users will soon enable wide diffusion of electronic communication within medical practice. E-mail between physicians and patients offers important opportunities for better communication. Linking patients and physicians through e-mail may increase the involvement of patients in supervising and documenting their own health care, processes that may activate patients and contribute to improved health. These new linkages may have profound implications for the patient-physician relationship. Although the federal government proposes regulation of telemedicine technologies and medical software, communications technologies are evolving under less scrutiny. Unless these technologies are implemented with substantial forethought, they may disturb delicate balances in the patient-physician relationship, widen social disparities in health outcomes, and create barriers to access to health care. This paper seeks to identify the promise and pitfalls of electronic patient-physician communication before such technology becomes widely distributed. A research agenda is proposed that would provide data that are useful for careful shaping of the communications infrastructure. The paper addresses the need to 1) define appropriate use of the various modes of patient-physician communication, 2) ensure the security and confidentiality of patient information, 3) create user interfaces that guide patients in effective use of the technology, 4) proactively assess medicolegal liability, and 5) ensure access to the technology by a multicultural, multilingual population with varying degrees of literacy.

Developmental regulation of expression of C-reactive protein and serum amyloid A in Syrian hamsters.

The fetal and maternal concentration of various plasma proteins alters during pregnancy. Cells in the livers of fetal hamsters accumulate serum amyloid A (SAA) and C-reactive protein (CRP) mRNA, major acute phase reactants, when lipopolysaccharide is administered to the fetal circulation. No fetal SAA or CRP mRNA response is seen when the mother is stimulated at a remote site by endotoxin or a nonspecific inflammatory agent. In addition, cells of the fetal hamster liver do not respond by accumulating SAA mRNA when exposed to the specific cytokines, tumor necrosis factor, IL-1, and IL-6. CRP mRNA levels increased in fetal livers after administration of tumor necrosis factor and IL-1. These data suggest that cells contained in the fetal liver can respond during an acute phase reaction but that the capacity of some acute phase reactant genes to respond to cytokines may be developmentally regulated. Studies of immature hamsters after birth show that the responses of CRP and SAA genes to lipopolysaccharide, tumor necrosis factor, IL-1, and IL-6 are reduced when compared with induction of mRNA accumulation for these acute phase reactants in adult animals.

Costs and effectiveness of ultrasonography and limited computed tomography for diagnosing appendicitis in children.

BACKGROUND: A protocol of ultrasonography (US) followed by computed tomography with rectal contrast (CTRC) has been shown to be 94% accurate in the diagnosis of acute appendicitis in children. OBJECTIVE: To evaluate the changes in patient management and costs of a protocol using US and CTRC in the evaluation of appendicitis in children. DESIGN, SETTING, AND SUBJECTS: Prospective cohort study of 139 children between 3 and 21 years of age who had equivocal clinical findings for acute appendicitis seen in the emergency department of a large, urban pediatric teaching hospital between July 1998 and December 1998. PROTOCOL: Children with equivocal clinical presentations for acute appendicitis were prospectively evaluated with US. Patients with positive findings for acute appendicitis went directly to the operating room. Patients with negative or equivocal findings on US underwent CTRC. Surgical management plans were recorded before imaging, after US, and after CTRC. MAIN OUTCOME MEASURES: Surgical management plans before and after the imaging protocol as well as total hospital direct and indirect costs incurred or saved by each change in management were determined. Costs were obtained through the hospital's cost database and by ratios of costs to charges. RESULTS: Of the 139 children, the protocol resulted in a beneficial change in management in 86 children (61.9%), no change in management in 50 children (36.0%) and an incorrect change in management in 3 children (2.1%). US alone resulted in a beneficial change in management decision in 12/31 children (38.7%), while US followed by CTRC resulted in a beneficial change in management in 74/108 children (68.5%). The protocol resulted in a total cost savings of $78 503.99 or $565/patient. CONCLUSION: A protocol of US followed by CTRC in children with negative or equivocal US examinations results in a high rate of beneficial change in management as well as in total cost savings in children with equivocal clinical presentations for suspected appendicitis.

Effect of a reduced postpartum length of stay program on primary care services use by mothers and infants.

OBJECTIVE: To determine the impact of reduced postpartum length of stay (LOS) on primary care services use. METHODS. DESIGN: Retrospective quasiexperimental study, comparing 3 periods before and 1 period after introducing an intervention and adjusting for time trends. SETTING: A managed care plan. INTERVENTION: A reduced obstetrical LOS program (ROLOS), offering enhanced education and services. PARTICIPANTS: mother-infant dyads, delivered during 4 time periods: February through May 1992, 1993, and 1994, before ROLOS, and 1995, while ROLOS was in effect. INDEPENDENT MEASURES: Pre-ROLOS or the post-ROLOS year. OUTCOME MEASURES: Telephone calls, visits, and urgent care events during the first 3 weeks postpartum summed as total utilization events. RESULTS: Before ROLOS, LOS decreased gradually (from 51.6 to 44.3 hours) and after, sharply to 36.5 hours. Although primary care use did not increase before ROLOS, utilization for dyads increased during ROLOS. Before ROLOS, there were between 2.37 and 2.72 utilization events per day; after, there were 4.60. Well-child visits increased slightly to.98 visits per dyad, but urgent visits did not. CONCLUSION: This program resulted in shortened stays and more primary care use. There was no increase in infant urgent primary care utilization. Early discharge programs that incorporate and reimburse for enhanced ambulatory services may be safe for infants; these findings should not be extrapolated to mandatory reduced LOS initiatives without enhancement of care.