Maximizing acceptability and usefulness of an automated telephone intervention: Lessons from a developmental mixed-methods approach

The objective was to describe the utility of mixed methods to inform the development of an automated telephone intervention to improve patients' compliance with asthma medication. As part of intervention development for a larger trial, we conducted 15 focus groups (n = 53) to design and develop calls, and to identify factors influencing intervention acceptability and usefulness. We piloted four call types and interviewed 64 participants to further improve call content and receptivity to the intervention. Feedback led to several changes to the intervention scripts and eventual calls, and an initial pilot led us to drop one of the calls. During the pilot, we reached 43 percent of target participants; 74 percent of those stayed on the call until it ended. This process provided key insights about automated calls, and may have broader applicability for the development of automated interventions designed to help patients manage a variety of chronic conditions.

[Cytokeratin 18 as marker for non-invasive diagnosis and prognosis of acute and chronic liver diseases]

INTRODUCTION

Currently liver biopsy represents the gold standard to assess severity and fibrosis grade in liver diseases. Since this laborious, costly, and invasive procedure is associated with possible complications, non-invasive methods and biomarkers, which allow for an easy, reliable, and repeatable assessment of liver disease are warranted. Cytokeratin (CK) 18 is an intermediary filament protein, expressed in hepatocytes, which is proteolytically cleaved during liver damage. The resultant CK-18 fragments are released by hepatocytes and can be detected in serum.

METHODS

A selective literature search in PubMed for original publications about the detection of CK-18 cell death markers in liver diseases was undertaken.

RESULTS

Assessment of CK-18 cell death biomarkers allows for the early detection of liver damage in acute and chronic liver diseases. This is even feasible when transaminases are in the normal ranges. Detection of CK-18 biomarkers can also hint at disease activity and severity. For example, patients with non-alcoholic steatohepatitis exhibit elevated serum cell-death markers compared to those with simple steatosis. Furthermore, in patients with relevant fibrosis higher CK-18 values are found as compared to those with low fibrosis. In acute liver failure, cell death biomarkers may assist decision finding for the necessity of liver transplantation.

DISCUSSION

Due to promising results of various studies, CK-18 cell death markers could be applied in clinical routine soon.

Clinician's use of automated reports of estimated glomerular filtration rate: a qualitative study

BACKGROUND

There is a growing awareness in primary care of the importance of identifying patients with chronic kidney disease (CKD) so that they can receive appropriate clinical care; one method that has been widely embraced is the use of automated reporting of estimated glomerular filtration rate (eGFR) by clinical laboratories. We undertook a qualitative study to examine how clinicians use eGFR in clinical decision making, patient communication issues, barriers to use of eGFR, and suggestions to improve the clinical usefulness of eGFR reports.

METHODS

Our study used qualitative methods with structured interviews among primary care clinicians including both physicians and allied health providers, recruited from Kaiser Permanente Northwest, a non-profit health maintenance organization.

RESULTS

We found that clinicians generally held favorable views toward eGFR reporting but did not use eGFR to replace serum creatinine in their clinical decision-making. Clinicians used eGFR as a tool to help identify CKD, educate patients about their kidney function and make treatment decisions. Barriers noted by several clinicians included a desire for greater education regarding care for patients with CKD and tools to facilitate discussion of eGFR findings with patients.

CONCLUSIONS

The manner in which clinicians use eGFRs appears to be more complex than previously understood, and our study illustrates some of the efforts that might be usefully undertaken (e.g. specific clinician education) when encouraging further promulgation of eGFR reporting and usage.

A primary care-based interdisciplinary team approach to the treatment of chronic pain utilizing a pragmatic clinical trials framework

Chronic pain affects at least 116 million adults in the USA and exacts a tremendous cost in suffering and lost productivity. While health systems offer specialized pain services, the primary care setting is where most patients seek and receive care for pain. Primary care-based treatment of chronic pain by interdisciplinary teams (including behavioral specialists, nurse case managers, physical therapists, and pharmacists) is one of the most effective approaches for improving outcomes and managing costs. To ensure robust integration of such services into sustainable health-care programs, evaluations must be conducted by researchers well versed in the methodologies of clinical trials, mixed methods and implementation research, bioinformatics, health services, and cost-effectiveness. Recent national health policy changes, in addition to the increasing recognition of the high prevalence and cost of chronic pain conditions, present a unique opportunity to shift the care paradigm for patients with chronic pain.

Comparison of pharmacy-based measures of medication adherence

Background

Pharmacy databases are commonly used to assess medication usage, and a number of measures have been developed to measure patients’ adherence to medication. An extensive literature now supports these measures, although few studies have systematically compared the properties of different adherence measures.

Methods

As part of an 18-month randomized clinical trial to assess the impact of automated telephone reminders on adherence to inhaled corticosteroids (ICS) among 6903 adult members of a managed care organization, we computed eight pharmacy-based measures of ICS adherence using outpatient pharmacy dispensing records obtained from the health plan’s electronic medical record. We used simple descriptive statistics to compare the relative performance characteristics of these measures.

Results

Comparative analysis found a relative upward bias in adherence estimates for those measures that require at least one dispensing event to be calculated. Measurement strategies that require a second dispensing event evidence even greater upward bias. These biases are greatest with shorter observation times. Furthermore, requiring a dispensing to be calculated meant that these measures could not be defined for large numbers of individuals (17-32 % of participants in this study). Measurement strategies that do not require a dispensing event to be calculated appear least vulnerable to these biases and can be calculated for everyone. However they do require additional assumptions and data (e.g., pre-intervention dispensing data) to support their validity.

Conclusions

Many adherence measures require one, or sometimes two, dispensings in order to be defined. Since such measures assume all dispensed medication is used as directed, they have a built in upward bias that is especially pronounced when they are calculated over relatively short timeframes (< 9 months). Less biased measurement strategies that do not require a dispensing event are available, but require additional data to support their validity.

Trial registration

The study was funded by grant R01HL83433 from the National Heart, Lung and Blood Institute (NHLBI) and is filed as study NCT00414817 in the clinicaltrials.gov database.

Use of health information technology to improve medication adherence

OBJECTIVES

To evaluate the effectiveness of an intervention based on health information technology (HIT) that used speech recognition software to promote adherence to inhaled corticosteroids (ICS) among individuals with asthma who were members of a large health maintenance organization.

STUDY DESIGN

Pragmatic randomized clinical trial.

METHODS

Adults with asthma enrolled in a large managed care organization (N = 8517) were randomized to receive either usual care or an interactive voice recognition (IVR) intervention designed to prompt medication refills and improve ICS adherence. The primary outcome was ICS adherence as measured by modified medication possession ratio calculated from the electronic medical record (EMR). Secondary measures included survey- and EMR-based measures of asthma morbidity.

RESULTS

Our primary analyses found that ICS adherence increased modestly but significantly for participants in the intervention group relative to those in the usual care group ( Δ= 0.02, 95% confidence interval 0.01-0.03), with a baseline adherence of 0.42 in both groups. No difference was observed in asthma morbidity measures. In post hoc analyses of participants receiving 2 or more direct IVR contacts or detailed messages, the intervention effect was more marked. The overall effect was triple that observed in the primary analyses (0.06 vs 0.02), and significant differences were observed between groups in asthma control.

CONCLUSIONS

An HIT-based adherence intervention shows potential for supporting medication adherence in patients with chronic diseases such as asthma. However, additional research is needed to determine how best to enhance the reach and effectiveness of such interventions.

An economic evaluation of a laboratory monitoring program for renin-angiotensin system agents

BACKGROUND

The efficiency of patient safety interventions is not well studied, especially laboratory monitoring for drug therapy. More than one-third of preventable adverse drug events are associated with inadequate monitoring. Current knowledge of decreasing adverse drug events through expanded monitoring programs is lacking.

DESIGN

The authors focused on a laboratory monitoring program (above usual practice) of renin-angiotensin system (RAS) agents to prevent adverse events of hyperkalemia and acute renal failure. They used a probabilistic decision model to estimate cost savings and cost effectiveness (at $30,000 and $10,000 per quality-adjusted life-year (QALY)). Costs included the monitoring program, and offsets from reduced care in 3 populations (overall, chronic kidney disease [CKD], and diabetes).

MAIN RESULTS

Adverse events were most common in those with CKD. Intervening on all new users or the subset with diabetes was almost never expected to be cost saving (probability <1%). But a monitoring program restricted to patients with CKD was expected to be cost saving (probability = 95%). A strategy that intervened on all patients, or those with diabetes, was never cost effective, (probability <1%). But intervening on patients with CKD was estimated to be cost effective (at either cost-effectiveness threshold) at least 95% of the time in the base case.

CONCLUSIONS

The authors' findings illustrate that for laboratory monitoring to be cost effective, the patient population must be at high enough risk of adverse events. Further inquiry into the willingness to pay for patient safety interventions is needed.

The Impact of Prescribing Safety Alerts for Elderly Persons in an Electronic Medical Record

BACKGROUND

Considerable effort and attention have focused on medication safety in elderly persons; one approach that has been understudied in the outpatient environment is the use of computerized provider order entry with clinical decision support. The objective of this study was to examine the effects of computerized provider order entry with clinical decision support in reducing the use of potentially contraindicated agents in elderly persons.

METHODS

With data from a 39-month period of a natural experiment, we evaluated changes in medication dispensing using interrupted time series analysis to estimate changes, controlling for prealert prescribing trends. The setting was a large health maintenance organization in the Pacific Northwest. All adult enrollees of the health plan participated. The intervention was computerized alerts cautioning against using certain medications in elderly persons. The main outcome measure was dispensing per 10,000 members per month.

RESULTS

Following the implementation of the drug-specific alerts, a large and persistent reduction (5.1 prescriptions per 10,000, P=.004), a 22% relative decrease from the month before alert implementation, in the exposure of elderly patients to nonpreferred medications was observed. We found no evidence of a decrease in use of nonpreferred agents for nonelderly patients. The reduction seen in use of nonpreferred agents for elderly persons was driven primarily by decreases in dispensing for tertiary tricyclic agents.

CONCLUSIONS

We found that alerts in an outpatient electronic medical record aimed at decreasing prescribing of medication use in elderly persons may be an effective method of reducing prescribing of contraindicated medications. The effect of the alerts on patient outcomes is less certain and deserves further investigation.

Monitoring of drugs with a narrow therapeutic range in ambulatory care

OBJECTIVES

To describe the proportion of patients receiving drugs with a narrow therapeutic range who lacked serum drug concentration monitoring during a 1-year period of therapy and to identify patient characteristics associated with lack of monitoring.

STUDY DESIGN

Retrospective cohort.

METHODS

Ambulatory patients (n = 17,748) at 10 health maintenance organizations who were receiving ongoing continuous drug therapy with digoxin, carbamazepine, divalproex sodium, lithium carbonate, lithium citrate, phenobarbital sodium, phenytoin, phenytoin sodium, primidone, quinidine gluconate, quinidine sulfate, procainamide hydrochloride, theophylline, theophylline sodium glycinate, tacrolimus, or cyclosporine for at least 12 months between January 1, 1999, and June 30, 2001, were identified. Serum drug concentration monitoring was assessed from administrative data and from medical record data.

RESULTS

Fifty percent or more of patients receiving digoxin, theophylline, procainamide, quinidine, or primidone were not monitored, and 25% to 50% of patients receiving divalproex, carbamazepine, phenobarbital, phenytoin, or tacrolimus were not monitored. Younger age was associated with lack of monitoring for patients prescribed digoxin (adjusted odds ratio, 1.86; 95% confidence interval, 1.39-2.48) and theophylline (adjusted odds ratio, 1.58; 95% confidence interval, 1.23-2.04), while older age was associated with lack of monitoring for patients prescribed carbamazepine (adjusted odds ratio, 0.59; 95% confidence interval, 0.44-0.80) and divalproex (adjusted odds ratio, 0.50; 95% confidence interval, 0.38-0.66). Patients with fewer outpatient visits were also less likely to be monitored (P < .001).

CONCLUSIONS

A substantial proportion of ambulatory patients receiving drugs with narrow intervals between doses resulting in beneficial and adverse effects did not have serum drug concentration monitoring during 1 year of use. Clinical implications of this finding need to be evaluated.

Electronic Medical Record Reminder Improves Osteoporosis Management After a Fracture: A Randomized, Controlled Trial

OBJECTIVES

Osteoporosis treatment rates after a fracture are low. This study evaluated methods to increase guideline-recommended osteoporosis care postfracture.

DESIGN

Participants were randomly assigned to usual care or one of two interventions. Analysis of primary outcomes used electronic data and linear regression.

SETTING

A Pacific Northwest nonprofit health maintenance organization.

PARTICIPANTS

Female patients aged 50 to 89 who suffered a fracture in 1999 and had not received bone mineral density (BMD) measurement or medication for osteoporosis (n=311) and their primary care providers (n=159).

INTERVENTION

Patient-specific clinical guideline advice to the primary care provider delivered by electronic medical record (EMR) message or electronic reminder to the provider plus an educational letter mailed to the patient.

MEASUREMENTS

BMD measurement and osteoporosis medication.

RESULTS

At 6 months, provider reminder resulted in 51.5% of patients receiving BMD measurement or osteoporosis medication, provider reminder plus patient education resulted in 43.1%, and usual care resulted in 5.9% (P<.001). The effect of provider advice combined with patient education was not significantly different from provider advice alone (P=.88). Patients aged 60 to 69 were 18% (95% confidence interval=3-34) more likely to receive BMD measurement or an osteoporosis medication than those aged 80 to 89.

CONCLUSION

Patient-specific postfracture advice to the provider through an EMR message significantly increased BMD measurement and osteoporosis medication. As EMRs become more widespread, this intervention could improve osteoporosis management for many postfracture patients. Future research should identify barriers to and facilitators of care for older, high-risk patients.

Laboratory monitoring of potassium and creatinine in ambulatory patients receiving angiotensin converting enzyme inhibitors and angiotensin receptor blockers

PURPOSE

Serum potassium and creatinine monitoring is recommended for patients prescribed angiotensin converting enzyme inhibitors (ACEi) and angiotensin receptor blockers (ARB). Much has been written about hyperkalemia associated with these drugs; little is known about laboratory monitoring patterns. The purpose of this retrospective cohort study was to assess creatinine and potassium monitoring and characteristics associated with monitoring among patients dispensed ACEi or ARB.

METHODS

This study was conducted in 10 United States health maintenance organizations. Study patients (n = 52 906) were aged 18 or older with dispensings of ACEi or ARB for at least 1 year. Serum potassium and creatinine monitoring were assessed from administrative data and medical records.

RESULTS

More than two-thirds (68.4%) of patients received laboratory monitoring. Likelihood of monitoring increased with age (adjusted odds ratio [OR] 2.10; 95% confidence interval [95%CI] 1.93, 2.28 [individuals >or= 80 compared to <50 years]), >9 outpatient visits (OR 1.46; 95%CI 1.39, 1.54), hospitalization (OR 1.15; 95%CI 1.06, 1.25), concomitant medications (potassium [OR 2.01; 95%CI 1.84, 2.20], diuretics [OR 1.54; 95%CI 1.47, 1.61], digoxin [OR 1.15; 95%CI 1.01, 1.30]), and comorbidities (diabetes [OR 1.68; 95%CI 1.61, 1.75], heart failure [OR 1.73; 95%CI 1.57, 1.90], chronic kidney disease [OR 2.95; 95%CI 2.48. 3.51]).

CONCLUSIONS

Nearly one-third of patients dispensed ACEi or ARB did not undergo laboratory monitoring at least yearly. Though patients at increased risk of hyperkalemia were more likely to be monitored, many remained unmonitored.

Laboratory monitoring of drugs at initiation of therapy in ambulatory care

BACKGROUND AND OBJECTIVES

Product labeling and published guidelines reflect the importance of monitoring laboratory parameters for drugs with a risk of organ system toxicity or electrolyte imbalance. Limited information exists about adherence to laboratory monitoring recommendations. The objective of this study was to describe laboratory monitoring among ambulatory patients dispensed medications for which laboratory testing is recommended at therapy initiation.

DESIGN AND SUBJECTS

We conducted a retrospective cross-sectional analysis of patients in 10 geographically distributed health maintenance organizations who were newly prescribed medications with recommended laboratory test monitoring. The main outcome measure was the proportion of initial drug dispensing without recommended baseline laboratory monitoring for 35 newly initiated drugs or drug classes.

RESULTS

One hundred seven thousand, seven hundred sixty-three of 279,354 (39%) initial drug dispensings occurred without recommended laboratory monitoring. Patients without monitoring were younger than patients who had monitoring (median 57 vs 61 years, P<.001). Thirty-two percent of dispensings where a serum creatinine was indicated did not have it evaluated (range across drugs, 12% to 61%); 39% did not have liver function testing (range 10% to 75%); 32% did not have hematologic monitoring (range 9% to 51%); and 34% did not have electrolyte monitoring (range 20% to 62%) (P<.001).

CONCLUSIONS

Substantial opportunity exists to improve laboratory monitoring of drugs for which such monitoring is recommended. This study emphasizes the need for research to identify the clinical implications of not conducting recommended laboratory monitoring, existing barriers to monitoring, and methods to improve practice.

Baseline Laboratory Monitoring of Cardiovascular Medications in Elderly Health Maintenance Organization Enrollees

OBJECTIVES

To identify correlates of laboratory monitoring errors in elderly health maintenance organization (HMO) members at the initiation of therapy with cardiovascular medications.

DESIGN

Cross-sectional study in 10 HMOs.

SETTING

United States.

PARTICIPANTS

From a 2 million-member sample, individuals aged 65 and older who received one of seven cardiovascular medications (angiotensin-converting enzyme (ACE) inhibitors, angiotensin receptor blockers (ARBs), amiodarone, digoxin, diuretics, potassium supplements, and statins) and did not have recommended baseline monitoring performed during the 180 days before or 14 days after the index dispensing.

MEASUREMENTS

The proportion of members receiving each drug for whom recommended laboratory monitoring was not performed. Laboratory monitoring error rates stratified by sex, age group, chronic disease score, and HMO site were examined, and logistic regression was used to identify predictors of laboratory monitoring errors.

RESULTS

Error rates varied by medication class, ranging from 23% of patients receiving potassium supplementation without serum potassium and serum creatinine monitoring to 58% of patients receiving amiodarone who did not have recommended monitoring for thyroid and liver function. Highest error rates occurred in the youngest elderly for ACE inhibitors, ARBs, digoxin, diuretics, and potassium supplements, although in patients receiving amiodarone and statins, errors were most frequent in the oldest elderly. Errors occurred more frequently in patients with less comorbidity.

CONCLUSION

Laboratory monitoring errors occurred frequently in elderly HMO members at the initiation of therapy with cardiovascular medications. Further study must examine the association between these errors and adverse outcomes.

Effect of lifestyle modifications on blood pressure by race, sex, hypertension status, and age

Recommendations for control of high blood pressure (BP) emphasize lifestyle modification, including weight loss, reduced sodium intake, increased physical activity, and limited alcohol consumption. The Dietary Approaches to Stop Hypertension (DASH) dietary pattern also lowers BP. The PREMIER randomized trial tested multicomponent lifestyle interventions on BP in demographic and clinical subgroups. Participants with above-optimal BP through stage 1 hypertension were randomized to an Advice Only group or one of two behavioural interventions that implement established recommendations (Est) or established recommendations plus DASH diet (Est plus DASH). The primary outcome was change in systolic BP at 6 months. The study population was 810 individuals with an average age of 50 years, 62% women, 34% African American (AA), 95% overweight/obese, and 38% hypertensive. Participants in all the three groups made lifestyle changes. Mean net reductions in systolic (S) BP in the Est intervention were 1.2 mmHg in AA women, 6.0 in AA men, 4.5 in non-AA women, and 4.2 in non-AA men. The mean effects of the Est Plus DASH intervention were 2.1, 4.6, 4.2, and 5.7 mmHg in the four race-sex subgroups, respectively. BP changes were consistently greater in hypertensives than in nonhypertensives, although interaction tests were nonsignificant. The Est intervention caused statistically significant BP reductions in individuals over and under age 50. The Est Plus DASH intervention lowered BP in both age groups, and significantly more so in older individuals. In conclusion, diverse groups of people can adopt multiple lifestyle changes that can lead to improved BP control and reduced CVD risk.

How to Design Computerized Alerts to Ensure Safe Prescribing Practices

BACKGROUND

Medication errors and preventable adverse drug events are common, and about half of medication errors occur during medication ordering. This study was designed to develop and evaluate medication safety alerts and processes for educating prescribers about the alerts.

METHODS

At Kaiser Permanente Northwest, a group-model health maintenance organization where prescribers have used computerized order entry since 1996, qualitative interviews were conducted with 20 primary care prescribers.

RESULTS

Prescribers considered alerts helpful for providing prescribing and preventive health information. More than half the interviewees stated that it would be unwise to let clinicians control or avoid safety alerts. Common frustrations were (1) being delayed by the alert, (2) having difficulty interpreting the alert, and (3) receiving the same alert repeatedly. Most prescribers preferred small-group educational sessions tied to existing meetings and having local physicians conduct education sessions.

DISCUSSION

The findings were used to design a strategy for introducing and promoting the interventions, modifying the alert text and tools, and focusing the education on how clinicians could use the alerts effectively.

Randomized trial of effect of alendronate continuation versus discontinuation in women with low BMD: results from the Fracture Intervention Trial long-term extension

To determine the effects of continuation versus discontinuation of alendronate on BMD and markers of bone turnover, we conducted an extension trial in which 1099 older women who received alendronate in the FIT were re-randomized to alendronate or placebo. Compared with women who stopped alendronate, those continuing alendronate for 3 years maintained a higher BMD and greater reduction of bone turnover, showing benefit of continued treatment. However, among women who discontinued alendronate and took placebo in the extension, BMD remained higher, and reduction in bone turnover was greater than values at FIT baseline, showing persistence of alendronate's effects on bone.

INTRODUCTION

Prior trials including the Fracture Intervention Trial (FIT) have found that therapy with alendronate increases BMD and decreases fracture risk for up to 4 years in postmenopausal women with low BMD. However, it is uncertain whether further therapy with alendronate results in preservation or further gains in BMD and if skeletal effects of alendronate continue after treatment is stopped.

MATERIALS AND METHODS

We conducted a follow-up placebo-controlled extension trial to FIT (FIT long-term extension [FLEX]) in which 1099 women 60-86 years of age who were assigned to alendronate in FIT with an average duration of use of 5 years were re-randomized for an additional 5 years to alendronate or placebo. The results of a preplanned interim analysis at 3 years are reported herein. Participants were re-randomized to alendronate 10 mg/day (30%), alendronate 5 mg/day (30%), or placebo (40%). All participants were encouraged to take a calcium (500 mg/day) and vitamin D (250 IU/day) supplement. The primary outcome was change in total hip BMD. Secondary endpoints included change in lumbar spine BMD and change in markers of bone turnover (bone-specific alkaline phosphatase and urinary type I collagen cross-linked N-telopeptide).

RESULTS

Among the women who had prior alendronate therapy in FIT, further therapy with alendronate (5 and 10 mg groups combined) for 3 years compared with placebo maintained BMD at the hip (2.0% difference; 95% CI, 1.6-2.5%) and further increased BMD at the spine (2.5% difference; 95% CI, 1.9-3. 1%). Markers of bone turnover increased among women discontinuing alendronate, whereas they remained stable in women continuing alendronate. Cumulative increases in BMD at the hip and spine and reductions in bone turnover from 8.6 years earlier at FIT baseline were greater for women continuing alendronate compared with those discontinuing alendronate. However, among women discontinuing alendronate and taking placebo in the extension, BMD remained higher and reduction in bone turnover was greater than values at FIT baseline.

CONCLUSIONS

Compared with women who stopped alendronate after an average of 5 years, those continuing alendronate maintained a higher BMD and greater reduction of bone turnover, showing benefit of continued alendronate treatment on BMD and bone turnover. On discontinuation of alendronate therapy, rates of change in BMD at the hip and spine resumed at the background rate, but discontinuation did not result in either accelerated bone loss or a marked increase in bone turnover, showing persistence of alendronate's effects on bone. Data on the effect of continuation versus discontinuation on fracture risk are needed before making definitive recommendations regarding the optimal length of alendronate treatment.

Bone Mineral Density Measurement and Treatment for Osteoporosis in Older Individuals With Fractures

BACKGROUND

Osteoporosis evaluation and treatment guidelines state that, because of the high risk for future fractures, a fracture in an older individual warrants initiation of pharmacological treatment or bone mineral density (BMD) measurement followed by treatment according to BMD. We compared current practice with these guidelines.

METHODS

We used the electronic data systems of a health maintenance organization to collect fracture, BMD measurement, and pharmacy data for women aged 50 to 89 years and men aged 65 to 89 years who sustained a study-defined fracture during 1998 or 1999. We determined those who had BMD measurement or pharmacological treatment for osteoporosis (bisphosphonate or estrogen) during the 2 years. We compared the evaluation and treatment data with evidence-based clinical guidelines (for women) or expert consensus (for men).

RESULTS

Of 70 513 members in the eligible age groups, 2804 persons sustained study-defined fractures. Overall, only 4.6% of those with fractures had treatment initiated after the fracture. Women sustained 80.7% of the study-defined fractures; 8.4% had BMD measurement and 42.4% received any treatment during the 2 years. Bone mineral density measurement and treatment frequency decrease significantly with age in women. In men, 1.5% had BMD measurement and 2.8% received any treatment. Approximately 51% (51.2%) of women and 95.5% of men in our study population were not evaluated or treated in accord with guideline or expert recommendations.

CONCLUSIONS

Evaluation and treatment rates for osteoporosis in older individuals with fractures fall far below national recommendations, especially for men. Intervention strategies should be developed and evaluated to prevent refracture in older individuals with fractures.

In vivo renal vascular and tubular function in experimental hypercholesterolemia

Hypercholesterolemia (HC) is often associated with impaired peripheral and coronary vascular responses to endothelium-dependent vasodilators, which are probably due to low bioavailability of nitric oxide. To examine the effect of HC on renal vascular and tubular function, 22 domestic pigs were studied after being fed a 12-week normal (n=11) or HC (n=11) diet. Renal regional perfusion and intratubular contrast media concentration in each nephron segment (representing fluid reabsorption) were quantified in vivo with electron-beam computed tomography before and after a suprarenal infusion of either acetylcholine (6 pigs of each diet) or sodium nitroprusside (SNP; 5 pigs of each diet). An increase in cortical perfusion, observed in normal pigs with acetylcholine (+35+/-6%, P=0. 002) and SNP (+12+/-4%, P=0.005), was blunted in the HC group (+8. 8+/-4.0, P=0.01, and -4.6+/-4.0%, P=0.1, respectively, P=0.003 and P=0.005 compared with normal) as was an increase in medullary perfusion (+58+/-21 in normal versus +24+/-11% in HC, P=0.04). A decrease in the intratubular contrast media concentration in the distal tubule and collecting duct of normal pigs was observed in all tubular segments (and was significantly enhanced in the proximal tubule and Henle's loop) in the HC group, which was associated with increased sodium excretion. The tubular and renal excretory responses to SNP were similar between the groups. In conclusion, early experimental HC in the pig attenuates renal perfusion response to both endothelium-dependent and -independent vasodilators possibly because of decreased bioavailability or decreased vascular responsiveness to nitric oxide. This vascular impairment may play a role in maladjusted renovascular responses and contribute to renal damage in later stages of atherosclerosis.

Low back pain: predictors of absenteeism, residual symptoms, functional impairment, and medical costs in Oregon workers' compensation recipients

BACKGROUND

Wide variations in disability duration and magnitude have been noted among recipients of workers' compensation for low back pain. Findings from recent studies have indicated that inclusion of a broad array of variables (i.e., physical, occupation, social, economic) is needed to understand differences in workers' responses to occupational low back pain.

METHODS

Workers' compensation and questionnaire data from 340 Oregon workers with low back claims were merged to develop multivariate models predicting: (1) absenteeism days, (2) residual symptoms, (3) functional impairment, and (4) medical costs.

RESULTS

Forty-two percent of the variation in low back symptoms was explained by: discontinuing physical fitness activities post-injury (beta = -.419), self-reported low energy/high fatigue (beta = -.227), poorer general health (beta = .137), and attorney involvement in claim (beta = .117), (adjusted R2 = .418, p < 0.001). Survival curves revealed significantly longer claim durations among workers who discontinued physical fitness activities post-injury, compared with workers who did not; these differences remained significant even after controlling for severity of the initial injury.

CONCLUSION

Continuation of physical fitness activities during the recovery process was found to be a significant predictor in three of four regression models, providing evidence on behalf of a relationship between fitness and positive health outcomes. However, it was not possible to clearly differentiate pre-morbid from post-injury fitness, nor to determine if this relationship was due to a therapeutic effect on the back, the general restorative benefits of remaining active, or represents a proxy variable for workers' self-care efforts during recovery.

Prevention of work-related disability

The authors, reporting from Kaiser Permanente, describe a new program that may be helpful to other managed care providers in preventing workplace injury and minimizing disability after injury.

Prevention of work-related disability

INTRODUCTION

The cost of work-related injury is large and is rising in many states. Managed care providers are being asked to assist with solutions, particularly in the area of facilitating return to work. Kaiser Permanente of the Northwest responded by developing the Kaiser on-the-job program, which includes processes to facilitate the primary, secondary, and tertiary prevention of work-related disability.

METHODS

This paper describes the role that managed care can play in the prevention of work-related disability through consultation, training, immunization programs, and targeted screening and case management interventions. A quality and case management system is described, which gives physicians feedback on modified work and time-off authorization by diagnosis.

RESULTS

The results demonstrate statistically significant decreasing physician-authorized average time loss for low back cases from 1991 through 1995 (17.8 disability days per case in 1991 and 15 per case in 1995, P = .01). According to Oregon State Accident Insurance Fund (SAIF Corporation) data, the Kaiser on-the-job average total claims cost was reduced 33% for disabling cases as compared to two other health care organizations (P = .002).

CONCLUSION

The methods utilized here to prevent work-related disability appear effective. They are relevant to many managed care program models and their efforts to improve workplace health and productivity.

Managed occupational health care in an HMO

This paper describes the efforts of an HMO to improve its delivery of occupational health services. Customer needs identification, occupational health structure, data systems, case management, clinical guidelines, and quality management are outlined. Our experience suggests that high-quality occupational health services can be integrated into managed care systems thereby offering cost-effective care to large numbers of workers. Comparing 1991 to 1995, physician authorization of total disability days was reduced 17.9% per disability case (p < .0001). Based on July 1994 to June 1995 Oregon State Accident Insurance Fund (SAIF Corporation) data, HMO average total claim cost was $916/claim representing respectively, a 21% and a 20% reduced cost compared to two PPO model programs (MCO 00 and MCO 01). Patient satisfaction data indicated that 90% of patients were satisfied or very satisfied with the physician they saw. The savings appear to be due to cost-effective treatment and rapid return to work.

The success of the Washington Department of Labor and Industries Managed Care Pilot Project: the occupational medicine-based delivery model

The Washington State Managed Care Pilot Project (MCP) tested the effects of experience-rated capitation on medical and disability costs, quality of care, worker satisfaction with medical care, and employer satisfaction in MCP-covered workers, compared with matched fee-for-service controls. In the MCP, medical costs were reduced by approximately 27%, functional outcomes remained the same, workers were less satisfied with their treatment and access to care initially, and employers were-much more satisfied with the quality and speed of the information received from the providers. The authors believe that it was the occupational medicine-based delivery model, working in conjunction with the method of reimbursement and the cultural context of managed care, that was the most significant innovation leading to the MCP successes. This article describes the occupational medicine-based delivery model implemented for the MCP.

Occupational injuries among urban recyclers

In this article, we describe the emergence of urban recycling as a new trade and discuss the new pattern of injuries among its practitioners. We conducted a retrospective chart review and convenience survey at an urban homeless health center. We found a high prevalence of severe, costly injuries, many of which are amenable to prevention. Lacerations, infections, needle sticks, and blunt trauma are all common in this group. Some cases are extremely expensive or even lethal. We conclude that a new trade and a new pattern of injuries associated with it have emerged around recycling.

The Back Injury Prevention Project pilot study. Assessing the effectiveness of back attack, an injury prevention program among nurses, aides, and orderlies

The Back Injury Prevention Project was a pilot study of "Back Attack," an educational program designed to prevent back injuries among nurses, nurses' aides, and orderlies. The pilot tested program feasibility, developed and tested instruments, and generated preliminary data measuring program effectiveness. Fifty-five nurses, aides, and orderlies on two medical/surgical units at two Kaiser Permanente medical centers in Portland, Oregon participated in the study. Intervention group scores on the composite back pain and composite fatigue scales decreased relative to the control group, but this did not reach statistical significance. A 19% improvement in scores for quality of patient transfer was observed for the intervention group (P < .0003), while the control group did not show any significant improvement during the same time period. Results of the pilot suggest that the Back Attack program changes behavior at least in the short term. Further study will be necessary to determine if the behavior change persists and back pain and injury rates are subsequently reduced.

Evaluating the patient-handling tasks of nurses

Nurses, nurses' aides, and orderlies are among the occupational groups at highest risk for back injury. The Kaiser Permanente Northwest Region developed a Back Injury Prevention Project (BIPP) to try to reduce the back injury rate among these groups. To obtain early data on program effectiveness, we developed an instrument, the BIPP Transfer Evaluation, to evaluate patient-handling tasks. Use of the BIPP Transfer Evaluation during the BIPP pilot study revealed a 19% +/- 5% SE (P = .0003) improvement in the quality of patient transfer in the intervention group. The BIPP Transfer Evaluation is an inexpensive way to get early, objective information about the quality of an intervention to reduce back injuries among nurses, nurses' aides, and orderlies.

Handedness and smoking

This article reports the observation that proportionately more left-handed persons smoke than dextrals, and a greater proportion of left-handers than right-handers smoke 10 or more cigarettes daily, regardless of sex, race, stress of residence (or social class), and prior history of smoking. This association is especially strong among males and persons residing in residence areas of high stress (low income, low education), and weak among black females and persons who smoke 30 or more cigarettes daily. The sample was drawn from four census areas in Detroit differing by race, socioeconomic levels, and crime rates. Respondents and their spouses were 25 to 60 yr. old, married, and had relatives in the metropolitan area (N = 1496).

5-Hydroxytryptamine metabolism in rat brain and liver homogenates

1. The metabolism of 5-hydroxyindoleacetaldehyde derived from 5-hydroxytryptamine incubated with tissue homogenates was studied as an indicator of aldehyde dehydrogenase and alcohol dehydrogenase activities.2. In liver and brain from rats, there were indications of the presence of one or more aldehyde dehydrogenases which were stimulated by NAD(+) to a greater extent than by NADP(+).3. In liver from rats, there were indications of the presence of one or more alcohol dehydrogenases, which were stimulated by NADH to a greater extent than by NADPH.4. In brain from rats, there were indications of the presence of one or more alcohol dehydrogenases which were stimulated by NADPH to a greater extent than by NADH.