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The rise and decline of nonsteroidal antiinflammatory drug-associated gastropathy in rheumatoid arthritis

Vol. 50, No. 8, August 2004, pp 2433–2440 2004, American College of Rheumatology Nonsteroidal Antiinflammatory Drug–Associated Gastropathy James F. Fries, Kirsten N. Murtagh, Mihoko Bennett, Ernesto Zatarain, Objective. Nonsteroidal antiinflammatory drug
42% of patients, a rise in the use of “safer” NSAIDs
(NSAID)–associated gastropathy is a major cause of
from 19% to 48% of patients, and increasing use of
hospitalization and death. This study was undertaken to
proton-pump inhibitors, but not with change in age,
examine whether recent preventive approaches have
NSAID exposure, or GI risk propensity score.
been associated with a declining incidence of NSAID
Conclusion. The risk of serious NSAID gastropa-
gastropathy, and, if so, what measures may have caused
thy has declined by 67% in these cohorts since 1992. We
the decline.
estimate that 24% of this decline was the result of lower
Methods. We studied 5,598 patients with rheuma-
doses of NSAIDs, while 18% was associated with the use
toid arthritis (RA) over 31,262 patient-years at 8 sites.
of proton-pump inhibitors and 14% with the use of less
We obtained standardized longitudinal information on
toxic NSAIDs. These declines in the incidence of NSAID
the patients that had been previously used to establish
gastropathy are likely to continue.
the incidence of NSAID gastropathy, and also informa-
tion on patient risk factors and differences in toxicity

Nonsteroidal antiinflammatory drug (NSAID)– between NSAIDs. Consecutive patients were followed up
associated gastropathy, which is associated with gastro- with biannual Health Assessment Questionnaires and
intestinal (GI) pathology involving hemorrhage, perfo- medical record audits between 1981 and 2000. The
ration, or obstruction of the GI tract and related major outcome measure was the annual rate of hospi-
conditions, is the most prevalent of serious drug side talization involving bleeding, obstruction, or perforation
effects, resulting in an estimated 100,000 hospitaliza- of the gastrointestinal (GI) tract and related conditions.
tions annually in the US (1). Although it was originally Results. Rates of GI-related hospitalizations rose
considered to be rare, the incidence of NSAID gastropa- from 0.6% in 1981 to 1.5% in 1992 (P < 0.001), and then
thy is recognized to be ϳ1.2–1.6% per year in patients declined to 0.5% in 2000 (P < 0.001). The fitted spline
curve fit the data well (R2
؍ 0.70). The period of rise was
with rheumatoid arthritis (RA), a relatively high-risk mainly associated with increasing patient age and the
population. The relative risk of developing serious GI GI risk propensity score. The period of decline was
complications in patients exposed to NSAIDs is 5–6 associated with lower doses of ibuprofen and aspirin, a
times that in those not exposed (2). The present status of decline in the use of “more toxic” NSAIDs from 52% to
the epidemic (whether the incidence is rising, falling, orconstant) is not known. We hypothesized that recentpreventive approaches to NSAID gastropathy should Supported by a grant from the NIH (AR-43584) to the have led to a reduction in its incidence.
Arthritis, Rheumatism, and Aging Medical Information System.
James F. Fries, MD, Kirsten N. Murtagh, MS, Mihoko Bennett, PhD, Ernesto Zatarain, MD, Bharathi Lingala, PhD, Bonnie Medical Information System) investigators have been Bruce, DrPH: Stanford University, Stanford, California.
following up consecutively enrolled RA patients from Address correspondence and reprint requests to James F.
Fries, MD, Department of Medicine, Stanford University Medical multiple settings since 1980, using systematic outcome School, 1000 Welch Road, Suite 203, Palo Alto, CA 94304. E-mail: assessment protocols (see the ARAMIS Web site at We follow up pa- Submitted for publication January 29, 2004; accepted in tients longitudinally, audit hospitalizations, and collect detailed data on drug use and adverse reactions (3,4). In codes 531–535, 787, and 789. Attributions were validated by a the present study, we sought to examine trends in the physician who was blinded to each patient’s medication use.
Statistical analysis. The percentage of patients with
incidence of NSAID gastropathy over time in this co- GI-related hospitalizations (number of hospitalizations per hort. We also sought to examine associations of NSAID 100 patient-years) was calculated as the total number of gastropathy with changes in potentially explanatory vari- incident GI-associated hospitalizations in a given year, divided ables, which were prespecified as age, sex, GI risk by the number of RA patients by year, and allowing only 1 propensity score, NSAID dose, use of specific NSAIDs, hospitalization per patient per year. Since there was a period of use of misoprostol, proton-pump inhibitors, and H rising incidence followed by a period of declining incidence, we used second-degree spline regression to determine the transi- receptor antagonists, percentage of patients at each data bank center, and frequency of NSAID exposure.
We identified patients receiving each NSAID for every year at every site, including both prescription and over-the-counter use, and computed the percentage of patients receiv- PATIENTS AND METHODS
ing each particular NSAID among all NSAID users. We Patients. We studied 5,598 RA patients whose data
prespecified NSAIDs as relatively more toxic or relatively safer were drawn from 8 ARAMIS data banks in the US and Canada based on our own data (8), on the meta-analysis by Henry et al (Stanford, California [2 data banks], Santa Clara County, (9), and on the CLASS and VIGOR (Celebrex Long-Term California, Wichita, Kansas, Saskatoon, Saskatchewan, Can- Arthritis Safety and Vioxx Gastrointestinal Outcomes Re- ada, Cincinnati, Ohio, Baltimore, Maryland, and Pittsburgh, search) studies (10,11). Time trends also allowed classification Pennsylvania), comprising 31,262 patient-years of observation.
of NSAIDs into those with increased use over time and thosewith decreased use over time. The percentage of patients These centers are population-based (Saskatoon and Santa receiving gastroprotective agents was calculated as the propor- Clara County), university clinics with quite different charac- tion of patients being treated with H receptor antagonists by teristics (Stanford, Cincinnati, Baltimore, and Pittsburgh), and prescription or over-the-counter, misoprostol, sucralfate, private practice–based (Wichita), and thus are believed to be and/or proton-pump inhibitors, divided by the number of reasonably representative of RA patients in the US and Canada. ARAMIS is a prospective, observational data bank We also examined trends in average age, disease system in which patients are enrolled consecutively under duration, disability, the percentage of patients receiving institutional review board approval, followed up for life, and NSAIDs, the percentage of patients with increased use or assessed prospectively by standard protocol for multiple vari- decreased use of NSAIDs, the percentage of patients receiving ables, including demographics, clinical and hospital outcomes, prednisone, and the GI risk propensity score. GI risk propen- mortality, and the frequency, dose, effectiveness, and toxicity sity scores were computed using the method of Singh et al (12), of specific treatments (5). The RA cohort reported herein was based on age, disability, global health, prior GI-related hospi- the subject of early reports establishing incidence rates, risk talization, prednisone use, and prior NSAID-related GI side factor models, and the relative toxicity of NSAIDs in gastropa- effect. This score represents the likelihood of a patient having thy, and thus provides a unique perspective from which to a serious GI complication in the following year. Statistics were computed using SAS for Windows, version 8.2 (Chicago, IL).
Measures. Patients in the ARAMIS are asked to
complete the Health Assessment Questionnaire (HAQ) every6 months. The HAQ is a widely used, comprehensive, patient self-reported outcome assessment instrument (6,7). Patientsreport on medication use, dosage, duration of use, and side The major finding on the rates of hospitalization effects. Information on both prescription and nonprescription for NSAID gastropathy is apparent in Figure 1. By aspirin and NSAID use is included. The protocol requires conservatively using the fitted spline regression data, followup of nonresponders, patient contact for missing infor-mation, acquisition of patient records for hospitalizations, and rather than the raw values for each year, we found that stringent quality control. Data from 1981 to 2000, during which the rate of GI-related hospitalizations first increased time prospective protocols were in place and remained con- from 0.6% per year in 1981 to a peak of 1.5% in 1992, and then decreased to 0.5% in 2000. The rate initially Ascertainment of serious GI events. The primary out-
nearly tripled, then declined by 67% from its high point comes were the number and incidence of serious GI eventsthat required hospitalization. Patients with bleeding of the in 1992. The spline regression indicated a concave upper or lower GI tract, clinically symptomatic gastritis, ulcers, function that peaked in 1992. We therefore defined the gastric outlet obstructions, and GI symptoms serious enough to period of rise as 1981–1992 (the first period) and the require hospitalization (abdominal pain, nausea, vomiting, or period of decline as 1993–2000 (the second period).
diarrhea) were identified from medical records. GI-related Trends over the period of rise and over the hospitalizations were first determined by patient self-report ofhospitalization. Hospital records were then audited by trained period of decline each were highly statistically significant reviewers for identification of International Classification of (P Ͻ 0.001), as was the fitted spline regression for these Diseases, Ninth Revision, Clinical Modification diagnostic trends (P Ͻ 0.001, R2 ϭ 0.70). GI-related hospitaliza- tially explanatory variables. The average age of thepatients in the cohort increased by nearly 6 years from1981 to 1992, from 56.7 years to 62.2 years, and thenremained relatively constant thereafter. Composite GIrisk propensity scores followed a pattern of rise through1992 similar to that of the GI-related hospitalizationrates, followed by a plateau. The percentage of patientsreceiving NSAIDs declined from 87% to 76% by 1992,and thereafter remained fairly constant. Average HAQdisability index scores, on a 0–3 scale (7), rose slightly inthe first period and improved considerably in the secondperiod, which is consistent with recent findings of de- Figure 1. Percentage of rheumatoid arthritis patients with serious
clining disability in RA associated with more aggressive gastrointestinal (GI) events that required hospitalization, over time.
use of disease-modifying medications over the past 2 The dotted line is a second-degree spline-fitted curve for these data.
decades (13). Average pain scores, on a 0–3 visualanalog scale, and average patient global health assess- tions as a percentage of all hospitalizations declined ment scores, on a 0–100 scale, similarly rose and then from 7.3% in 1981, to 5.7% in 1992, and to 4.8% in 2000.
fell, but differences were slight. Average disease dura- When considering only those patients who were exposed tion rose during the first period and subsequently de- to NSAIDs, a curve that was higher than, but of similar clined slightly. Prednisone use (average dosage ϳ7 mg/ shape as, that in Figure 1 was found, with a beginning day throughout) increased in the second period; this rate of GI-related hospitalizations of 0.5%, a peak of would have been expected to increase the rates of 2.1% in 1992, and the final value of 0.5%. Results were serious GI events during the period in which they were consistent across the 8 data bank centers.
Table 1 summarizes the trends in some poten- We also examined changes in drug dosage over Characteristics of the study population by year* * HAQ DI ϭ Health Assessment Questionnaire disability index; RA ϭ rheumatoid arthritis; NSAIDs ϭ nonsteroidal antiinflammatory drugs; GI ϭgastrointestinal.
† See Figure 2.
‡ See Figure 3.
Figure 2. Percentage of use of those drugs with increased usage over
Figure 4. Percentage of rheumatoid arthritis (RA) patients taking
time (“less toxic” drugs), from among the total nonsteroidal antiin- gastroprotective agents over time. H antagonists (H2) include cime- tidine, ranitidine, and famotipine. Proton-pump inhibitors (PPI) in-clude omeprazole and lansoprozole. Misoprostol (Miso) is a syntheticprostaglandin, including misoprostol alone and in combination with time. Ibuprofen and noncardiac aspirin dosages each declined by ϳ40% in the second period and thus corre-lated with the decline in GI complications; other NSAIDdosages did not appreciably change. The percentage ofpatients taking low-dose (Յ325 mg per day) aspirin 2 years of the study. The 5 NSAIDs that showed an increased from 3% in 1992 to 8% in 2000, while the increase in use are all drugs that have been reported average low-dose cardiac aspirin dosage declined from to be among the least toxic of the NSAIDs (8–11).
ϳ200 mg per day to ϳ150 mg per day. We did not find During our entire observation period, patients taking increasing doses for any of the drugs in either period, these drugs had a rate of serious GI events of 0.54% and thus “dose creep” was eliminated as a possible cause Figure 3 shows the time trends in market share The proportion of use of each specific NSAID in for the 8 drugs that were prespecified as more toxic. All these cohorts was also calculated for each year. Figure 2 of these had reduced usage over the entire period.
shows trends for use of the drugs that were prespecified Aspirin lost the largest share, although the greatest as less toxic. The largest increase was in the use of declines were in the usage of piroxicam, sulindac, and ibuprofen (which showed, at the same time, a decline in indomethacin. Each of these 8 drugs has been reported dose) and in the use of the more specific cyclooxygenase to have a higher-than-average toxic effect on the GI tract 1–sparing drugs rofecoxib and celecoxib over the last (9,10). Over our observation period, patients takingthese drugs had a rate of serious GI events of 0.78% peryear.
Time trends in the use of gastroprotective agents are shown in Figure 4. Two striking trends were evident:a rapid rise in the use of H receptor antagonists in the first period, and a rapid rise in the use of proton-pumpinhibitors in the second period, which ended with a 16%use of proton-pump inihitors. Misoprostol (ϳ5%) andsucralfate were not widely used. Data on identificationor treatment of Helicobacter pylori infection were notreliably reported in the charts reviewed, but treatmentfor H pylori appeared to be rare.
Figure 3. Percentage of use of drugs with decreased usage over time
(“more toxic” drugs), from among the total nonsteroidal antiinflam- The prevalence of serious GI events associated matory drug (NSAID) use. The aspirin data exclude use of cardiopro-tective doses of aspirin.
with NSAID use in this large, longitudinal, multicenter study of RA patients rose markedly from 0.6% of NSAID gastropathy (24). Results were disappointing patients per year in 1981 to 1.5% per year in 1992, and when regular doses were used, but prevention was then fell to 0.5% per year in 2000. Both the rise and the subsequently documented with double doses of H an- decline were steady, were consistent, and have plausible tagonists (25). Misoprostol, a synthetic prostaglandin explanations. The decline in NSAID-related GI prob- analog, was studied by Graham et al in 1988, and those lems, if generalizable, represents a substantial improve- authors showed that endoscopic ulcers decreased follow- ment in the health of the public. These improvements ing this therapy (26). Decreases in GI complications of are likely to be the result of the joint efforts of epide- ϳ40% with the use of misoprostol were shown by miologists, gastroenterologists, rheumatologists, regula- Silverstein et al in 1995 (27). A meta-analysis of preven- tion trials by Koch et al in 1996 suggested that the newer A number of relevant events over the past de- proton-pump inhibitors would be more effective preven- cades may have directly influenced these trends (14). We tive agents (28), and this was confirmed by Yeomans et have taken note of a few of the earliest reports and those al in 1998 (29). Treatment of H pylori infection has been that may have had some of the greatest impacts. The found to be as effective as proton-pump inhibitors in earliest hints of NSAID-related GI problems are found some studies (30–32), although the incidence of this in the observations of Douthwaite and Lintott in 1938 (15), and these observations were repeated in a more modern era by Sun et al in 1974 (16). Levy noted the broad use during the period of declining incidence of association between aspirin use and major GI bleeding NSAID gastropathy in this study, and all of these agents in 1974 (17). The high prevalence of NSAID-associated were promoted as being safer than their predecessors.
endoscopic erosions and ulcers led Roth and Bennett to They included nabumetone and etodolac in 1991, Ar- coin the term NSAID gastropathy in 1987 and to suggest throtec (which combined diclofenac and misoprostol) in that it might be quite common (18). The potentially 1997, celecoxib in 1998, and rofecoxib in 1999 (30).
life-threatening nature of these problems was suggested Studies have suggested that the cyclooxygenase by Armstrong and Blower in 1987 (19). In 1988, Griffin 1–sparing agents celecoxib and rofecoxib have toxic and colleagues noted the association of NSAID use and effects on the GI tract that are only half that of the mortality linked to peptic ulcer disease in the elderly traditional NSAIDs (10,11,33,34). Even newer agents (20). In 1989, our group, using the patient cohorts of this have since entered the market but were not available current report, began to quantitate the epidemiology of during the present study period. A change in treatment NSAID gastropathy, finding a GI-related hospitalization strategy for RA patients from one based on NSAIDs to incidence of 1.6% per year in RA patients and a relative one based on disease-modifying antirheumatic drugs risk of 5.2 (21); these data are approximated in the (DMARDs) occurred over this period of observation present study by the average values in the period of (35–37) and likely explains the decline in NSAID usage In 1991, our group extended these observations The period of rising frequency of NSAID gas- and identified age and other variables that were associ- tropathy was associated with a strong trend toward ated with increased risk of NSAID gastropathy (2).
increasing age with NSAID use in these cohorts. Age has Griffin and colleagues also observed the strong associa- consistently been identified as the most important risk tion with age in the Tennessee Medicaid data set in 1991 factor for NSAID gastropathy, other than prior GI- (22). We also analyzed differences in toxicity among the related hospitalization, and acts exponentially as a risk NSAIDs in 1991, finding up to 4-fold differences (8) factor (2,22). The average age of RA patients in these between each NSAID despite a prevailing prior view cohorts rose by 5.5 years from 1981 to 1992, which is that there were no such differences (23). By 1996, Henry sufficient by itself to account for a near doubling of the et al were able to identify 12 sets of studies consistently incidence of serious GI events. The percentage of showing differential toxicity among the NSAIDs, with a NSAID-receiving patients older than age 75 years rose similar magnitude of differences and with similar order- from 4% to 14% over this same period. There also was a smaller trend toward more use of NSAIDs in women, These findings, even before they were published and an increase in average disability levels, in pred- and disseminated, began to affect the development of nisone use, and in the overall GI risk propensity score.
new treatments. Roth and colleagues began, in 1987, to Nevertheless, the percentage of RA patients tak- explore the uses of H antagonists in the prevention of ing NSAIDs in these cohorts was steadily decreasing, which should have acted to lower the risks; this decline tional 2%. After accounting for the increased GI risk in NSAID use was likely to be related to the increasing propensity scores, from a mean of 14 to a mean of 16, emphasis on use of DMARDs to control disease activity among those patients taking proton-pump inhibitors (8), the estimate of the effects of gastroprotection sums to creased during the period of rise, these agents have been ϳ12% overall, and 18% of the observed decline.
found to be of little value, in regular doses, when used as Third, conservatively assuming a linear dose- prophylaxis against serious NSAID gastropathy (28).
response curve for NSAID complications, the 40% The frequency of prednisone use, another risk factor, reduction in dose for aspirin and ibuprofen, which made increased during the period of rising incidence. There- up 40% of the NSAID market share, would account for fore, some originally plausible explanatory factors, such a reduction of 16%, or 24% of the observed reduction.
as sex or increasing NSAID exposure, do not appear to Thus, we estimate that 24% of the observed decline was have played a role in the development of the epidemic.
due to lower doses of some NSAIDs, 18% was due to use Increases in patient age, prednisone use, and the GI risk of proton-pump inhibitors, and 14% was due to use of propensity score are the most likely explanations for the safer NSAIDs. We therefore have suggestive evidence to explain about two-thirds (66%) of the observed decline.
In the period of declining frequency of serious GI What factors may have contributed to the re- complications, the frequency of NSAID use, average mainder of the decline? These are more speculative age, and GI risk propensity score all reached a plateau, because of limitations in our data. It could be explained, and therefore could not have made major contributions in part, by uncaptured aspects of the 3 dominant forces.
to the decline. Disability levels declined somewhat, For example, within the “more toxic NSAID” category, possibly suggesting that the patients were sturdier. Im- were there greater decreases in use of the most toxic pressively, there was a striking shift in the use of specific drugs? Were proton-pump inhibitors used almost exclu- NSAIDs, with a decrease in use of the more toxic drugs sively in the highest-risk patients, which would increase and an increase in use of those with lesser toxicity. There effects beyond what we projected? Were dose reductions was a 40% decrease in the dosage of both aspirin and in the most toxic, but less frequently used, agents, for ibuprofen, both of which have a high frequency of use.
which we did not have sufficient data, important? Inter- Moreover, a steady stream of new drugs entered the action terms, which go beyond our data, could have market, including nabumetone and etodolac, and the made material contributions. Moreover, our explana- cyclooxygenase 1–sparing drugs rofecoxib and celecoxib tions are not entirely mutually exclusive, so that we achieved large market shares toward the end of our might have overestimated some contributions. What were the effects, if any, of increasing use of endoscopy or Which of these various trends may have contrib- generally declining hospitalization rates? As disability uted to the decline in serious GI events? The answers levels in RA decline as a result of increasing DMARD are intrinsically speculative, and therefore we discuss use, do RA patients become more resistant to GI them here, rather than presenting them as results. There complications? There are many other potential contri- are 3 particularly suggestive associations. First, we ob- butions to the decline that we could not measure.
served a shift away from the use of NSAIDs with an For example, we do not have data on H pylori incidence of serious toxicity in the GI tract of 0.78% per prevalence over time. Treatment of H pylori infection or year toward NSAIDs with an average incidence of reduction in prevalence of H pylori could have had an 0.54%, yielding a blended toxicity incidence rate of effect. We tend to discount a major effect of H pylori, 0.72% in 1992 and of 0.65% in 2000, which is sufficient however, since its prevalence in our cohort is likely to to explain a reduction of ϳ14% of the overall 67% have been low (US and Canadian patients with access to decline in the incidence of serious GI events (a decline care) and the relationship of H pylori to serious NSAID- related GI events itself remains controversial. Overall, it Second, use of proton-pump inhibitors rose from appears to be reasonable to assume that most of the none in 1992 to 16% in 2000. Assuming a preventive decline in serious NSAID effects came from lower doses benefit of 50% from the use of proton-pump inhibitors, of safer drugs in conjunction with greater use of gastro- their use would reduce the incidence of serious GI complications by 8%. Assuming a 40% protection rate National effects upon the epidemic of NSAID from the use of misoprostol, with its lower frequency of gastropathy are less encouraging. The national market use, the incidence rates would be reduced by an addi- for NSAIDs (in millions of tablets/capsules) rose from 2,836 in 1981 to 4,242 in 1993 and to 6,305 in 2000 (Fort inflammatory drug treatment in rheumatoid arthritis. Arch Intern J: personal communication). Thus, even if the results in 2. Fries JF, Williams CA, Bloch DA, Michel BA. NSAID-associated our RA cohorts can be generalized, much of the decline gastropathy: incidence and risk factor models. Am J Med 1991;91: in incidence will have been countered by the increases in exposure, and the estimate of more than 100,000 hospi- 3. Fries JF. The ARAMIS (American Rheumatism Association Medical Information System) post-marketing surveillance pro- talizations annually in the US (2) may still be relatively current. Continued introduction and marketing of newer 4. Fries JF, Spitz PW, Williams CA, Bloch DA, Singh G, Hubert HB.
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Microsoft word - 18 apr 2008

GLACIER COUNTY COMMISSIONERS REGULAR MEETING Friday, April 18, 2008 The Board of Glacier County Commissioners met at a regular meeting at 8:00 a.m. on Friday, April 18, 2008. Commissioners John Ray-not present late flight from Washington, D.C., Michael DesRosier-not present late flight from Washington, D.C.~Present @ 11:45 a.m., and Ron Rides At The Door was present. Clerk and Recorde


Artigo de Revisão de Literatura Tratamento da periimplantite: revisão da literatura Periimplantitis treatment: literature review Leonardo FRANCIO*Andrea Maria de SOUSA**Carmen Lucia Mueller STORRER***Tatiana Miranda DELIBERADOR****Andressa Carla de SOUSA*****Eduardo PIZZATTO******Tertuliano Ricardo LOPES******* Endereço para correspondência: Andrea Maria de Sousa Rua Padre Ag

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