Combination of corticosteroids and 5-aminosalicylates or corticosteroids alone for patients with moderate-severe active ulcerative colitis: A global survey of physicians' practice

Abstract

AIM

To examine treatment decisions of gastroenterologists regarding the choice of prescribing 5-aminosalycilates (5ASA) with corticosteroids (CS) versus corticosteroids alone for patients with active ulcerative colitis (UC).

METHODS

A cross-sectional questionnaire exploring physicians’ attitude toward 5ASA + CS combination therapy vs CS alone was developed and validated. The questionnaire was distributed to gastroenterology experts in twelve countries in five continents. Respondents’ agreement with stated treatment choices were assessed by standardized Likert scale. Background professional characteristics of respondents were analyzed for correlation with responses.

RESULTS

Six hundred and sixty-four questionnaires were distributed and 349 received (52.6% response rate). Of 340 eligible respondents, 221 (65%) would continue 5ASA in a patient hospitalized for intravenous CS treatment due to a moderate-severe UC flare, while 108 (32%) would stop the 5ASA (P < 0.001), and 11 (3%) are undecided. Similarly, 62% would continue 5ASA in an out-patient starting oral CS. However, only 140/340 (41%) would proactively start 5ASA in a hospitalized patient not receiving 5ASA before admission. Most (94%) physicians consider the safety profile of 5ASA as very good. Only 52% consider them inexpensive, 35% perceive them to be expensive and 12% are undecided. On multi-variable analysis, less years of practice and perception of a plausible additive mechanistic effect of 5ASA + CS were positively associated with the decision to continue 5ASA with CS.

CONCLUSION

Despite the absence of data supporting its benefit, most gastroenterologists endorse combination of 5ASA + CS for patients with active moderate-to-severe UC. Randomized controlled trials are needed to assess if 5ASA confer any benefit for these patients.

Key Words: Inflammatory bowel disease, Corticosteroids, 5-aminosalicylates, Ulcerative colitis

Core tip: Patients with moderate-severe active ulcerative colitis are often treated with corticosteroids. Whether 5-aminosalycilates (5ASA) offer any benefit when combined with corticosteroids for these patients has not been explored. This global survey among expert gastroenterology physicians in 12 countries shows division of opinion regarding this treatment choice, but demonstrates that the majority of doctors administer corticosteroids with continued 5ASA, despite the absence of evidence supporting this combination. If this “crowd wisdom” is correct and the addition of 5ASA offers even small added benefit for these severely sick patients, this could comprise an important simple tool for improving outcomes in acute ulcerative colitis. The results of this survey call for the need for a controlled clinical trial to examine this treatment choice.

INTRODUCTION

The role of corticosteroids (CS) in the treatment of moderate-to-severe exacerbation of ulcerative colitis (UC) is well established[1-3]. Many of these patients present on existing therapy with 5-aminosalycilates (5ASA), which are efficacious in mild-moderate UC. However, there are no data investigating whether the continuation of 5ASA agents in combination with CS in patients with a moderate-to-severe UC flare offers any additional benefit compared to treatment with CS alone. Arguably, 5ASA might act in concert with CS to exert an additional therapeutic benefit. Conversely, if 5ASA are of no benefit in this situation, then patients can be spared from an unnecessary drug and its unjustified expense.

Therefore, the goal of the present study was to explore the real-life practice of gastrointestinal (GI) and inflammatory bowel disease (IBD) experts with respect to prescribing 5ASA to patients with moderate-severe UC needing CS treatment. A secondary aim was to investigate factors associated with physicians’ therapeutic choices.

MATERIALS AND METHODS

Design and participants

This was a cross-sectional survey of GI physicians in 12 countries in five continents: Australia, Brazil, Canada, China, France, Greece, Israel, Italy, Korea, Serbia, United Kingdom and United States. GI fellows were excluded, but GI specialists were eligible regardless of whether they work in a hospital or exclusively at an out-patient setting. The questionnaire was distributed by sub-investigators to respondents directly or through an additional contact (one-stage “Snow-balling” technique). We deliberately elected to distribute questionnaires directly, as this technique was previously found to result in a higher response rate[4], as opposed to low response rates often experienced by surveys conducted through mailing lists of professional societies’ members or through survey websites[5,6]. The study was approved by the Sheba Medical Center Institutional Review Board.

Development of questionnaire

A prior search of the literature did not identify an existing questionnaire exploring the research question. Therefore, an English-language questionnaire was constructed, using a balanced positive and negative-phrased question structure (Reverse phrasing) to reduce response-bias (supplementary Table 1). A standardized Likert scale ranging between1-5 was used to assess the different degrees of agreement to a presented therapeutic strategy. Data about the respondent physicians’ professional background were also obtained. The questionnaire was approved by all co-investigators and was additionally examined by three external IBD experts for content validity, to ascertain whether the content of the questionnaire was appropriate and relevant to the study purpose. The questionnaire was distributed to physicians in its English format to avoid variations caused by the process of translation/back-translation into several different languages. Comprehensibility was validated by six GI physicians (two native English speakers and four non-native speakers). Further, a question inquiring about ease of English comprehensibility was inserted, and responses from individual physicians who graded comprehensibility of the questionnaire as less than “easy” or “very easy” were a-priori excluded. Additionally, a pre-planned sensitivity analysis was performed including only respondents who practice medicine in English speaking countries (United States, Canada, United Kingdom and Australia).

Table 1 Background characteristics of survey respondents.

Parameter		n (%)
	University hospital	256 (78.8)
Practice setting	Regional/district hospital	33 (10.1)
	Outpatient clinic	36 (11.1)
	Less than 25%	183 (55.3)
IBD in clinic	25% or more (IBD expert)	148 (46.7)
Years of practice, median (IQR, range)		10.5 (5-20, 0.5-60)
Country of practice	Australia	31 (9.1)
	Brazil	22 (6.5)
	Canada	40 (11.8)
	China	38 (11.2)
	France	9 (2.6)
	Greece	46 (13.5)
	Israel	33 (9.7)
	Italy	19 (5.8)
	South Korea	20 (5.9)
	Serbia	10 (2.9)
	United Kingdom	19 (5.8)
	United States	53 (15.6)

Statistical analysis

Descriptive statistics were used to detail distribution of responses among the five possible grades of agreement for each question. When comparative analyses were performed, scales 1 and 2 (“Strongly agree” and “tend to agree”) were grouped together as responses endorsing the presented therapeutic decision, while a Likert response of 4 (“tend to disagree”) and 5 (“strongly disagree”) were grouped as not endorsing the proposed therapy decision. Responses of 3 (“undecided”) were separately analyzed. Sample size was determined by taking into account five variables, of which four had multiple sub items. For the resulting 15 variables, and using a subject to item ratio of 1:15, at least 225 subjects were needed to reduce the risk of over-fitting the logistic regression model[6]. Because of the global nature of this survey and absence of data on the total world number of GI specialists, power calculation for total sample size could not be performed, rendering the results exploratory. Comparisons of proportions were performed by Z test when single population was considered or by Fisher exact test when comparing proportions between two populations (e.g., responses of IBD experts versus non-experts). In the absence of definitive definition of what constitutes an IBD expert and in line with previous studies[4], respondents with ≥ 25% of their patients being IBD patients were pragmatically defined as IBD experts.

Multi-variable analysis was performed using backward logistic regression for all variables of interest. All statistics were performed using MedCalc statistical software (Marieke, Denmark). P value of < 0.05 was considered significant.

RESULTS

Overall, 664 questionnaires were distributed in 12 countries in five continents. Of these, 349 completed questionnaires were received, yielding a response rate of 52.6%. Nine questionnaires were excluded: Two were received from GI trainees and seven from respondents indicating only fair comprehension of the questionnaire (four from Italy, two from China and one from the United States). Thus, a total of 340 returned questionnaires were eligible for analysis. The distribution of the country of origin among eligible respondents is shown in Figure 1. The background professional characteristics of the respondents are shown in Table 1.

Figure 1 Distribution of countries of practice among the responding physicians.

Physicians’ attitudes toward combination 5ASA-corticosteroids

Overall, 221 (65%) of the respondents would strongly agree or tend to agree to continue 5ASA in a patient hospitalized for intravenous CS treatment due to a moderate-severe flare of UC, compared with 108 (32%) who would stop the 5ASA (P < 0.001), and 11 (3%) who were undecided. This comparison is shown in Figure 2A.

Figure 2 Distribution of responses for the three strategy choice questions, each denoted by the title above. A: Continue 5ASA in a hospitalized steroid-treated paitent; B: Continue 5ASA in an out-patient staring oral steroids; C: Start de-novo 5ASA in a hospitalized steroid-treated patient. The gray bars denote the detailed distribution of by percentage of responses to each of the five multiple choice answers. The black bars denote the overall comparison between proportion of respondents endorsing the strategy (summed percentage of “Strongly agree” and “Tend to agree”) vs the proportion of respondents rejecting this strategy (summed percentage of “Tend to disagree” and “Strongly disagree”). 5ASA: 5-Aminosalycilates.

Similarly, when starting oral CS for a non-hospitalized outpatient with a mild-moderate UC flare despite optimized 5ASA treatment, the majority (212/340, 62%) of physicians would continue 5ASA, whereas 97/340 (28.5%) physicians would stop 5ASA and administer CS mono-therapy (P < 0.001; Figure 2B). In contrast, only 140/340 of the physicians would start 5ASA concurrently with CS in a patient hospitalized with UC flare who was not already on 5ASA prior to admission, compared to 172/340 who opted to treat such patients with CS mono-therapy (P = 0.07; Figure 2C).

When inquired about English language comprehensibility of the questionnaire, 284/347 (82.7%) respondents considered it to be very easy, 55 (15.8%) as easy, and seven (2%) as fairly understandable. None of the respondents rated the questionnaire as difficult or as very difficult to comprehend. As specified above, the seven respondents with only “fair” understanding of the language were excluded from further analysis. Nevertheless, to further validate the responses, a sensitivity analysis was performed including only the 143/340 physicians practicing in English-speaking countries (Australia, Canada, United States and United Kingdom). Similar to the results in the entire cohort, 64.5% of the English-speaking physicians endorsed continuing 5ASA in a hospitalized steroid-treated patient with moderate-severe UC, and 73% would continue 5ASA in an out-patient starting CS for nonresponsive mild-moderate UC flare.

Perceptions on cost and safety of 5ASA

To explore if physicians’ perceived costs or safety of 5ASA played any role in the therapeutic choice between combination 5ASA + CS or corticosteroid alone, respondents were also queried about their opinion towards these topics. Overall, the vast majority (94%) of physicians perceive 5ASA as having very good safety profile (Figure 3A). However, opinions were more split with respect to whether 5ASA are expensive, or not (Figure 3B); yet, there was no difference in the preference for combination 5ASA + CS versus CS alone between physicians who perceived 5ASA as non-expensive to those who considered them expensive (OR = 1.45, 95%CI: 0.88-2.3, P = 0.14). There was a trend for physicians who agreed that 5ASA drugs have very good safety profile to be more likely to prefer combination 5ASA + CS, compared to physicians who disagreed to the statement of 5ASA safety (OR = 4.2, 95%CI: 1.02-17.1, P = 0.045), but this analysis was limited by the small number of doctors perceiving 5ASA as not very safe (n = 9, 3% of the respondents). In contrast, physicians who professed a belief that mechanistically 5ASA may still exert some biologic effect when combined with CS, were significantly more likely to prescribe this combination compared to those not believing in this additive or synergistic mechanism (OR = 7.3, 95%CI: 4-13.3, P < 0.001).

Figure 3 Distribution of responses for the three physician's perception questions, each denoted by the title above. A: 5ASA have very good safety profile; B: 5ASA are generally not expensive; C: 5ASA may have added benefit in combination with corticosteroids. The gray bars denote the detailed distribution by percentage of responses to each of the five multiple choice answers. The black bars denote the overall comparison between proportion of respondents agreeing to a contention (summed percentage of “Strongly agree” and “Tend to agree”) vs the proportion of respondents rejecting the contention (summed percentage of “Tend to disagree” and “Strongly disagree”). 5ASA: 5-Aminosalycilates.

Analysis of factors impacting the choice of combination 5ASA + CS

Along with perceptions on cost and safety of 5ASA, several background professional characteristics of respondents were investigated for their correlation with the decision to administer combination CS + 5ASA or CS alone. On uni-variable analysis, there was a non-significant trend for IBD experts (n = 183) to be less likely to endorse combination 5ASA + CS compared to GI doctors who are not IBD experts (n = 148, OR = 0.63, 95%CI: 0.39-1.03, P = 0.07). GI doctors working in an out-patient clinic setting (n = 32) were more likely to recommend combination 5ASA + CS to hospitalized UC patients compared to physicians with hospital based positions (n = 281, OR = 3.7, 95%CI: 1.3-11.1, P = 0.01). Physicians who recommended combination therapy had been practicing as a GI expert for a median of 10 years (IQR25-75 5-18) compared to median of 13 years (IQR 6-21.5) for physicians recommending monotherapy with CS alone (P = 0.03). On multi-variable analysis, however, perception of a plausible synergistic/additive mechanism of action for 5ASA with corticosteroids and less years of experience as GI expert were the only two variables that had a positive independent association with the decision to administer combination therapy (Table 2).

Table 2 Uni-variant and multi-variable analysis of factors for their association with prescribing combination 5-Aminosalycilates + corticosteroids to a hospitalized moderate-severe ulcerative colitis patient.

Variable	Rate	Unadjusted odds ratio for prescribing combination 5ASA + CS	95%CI	P value	Adjusted odds ratio for prescribing combination 5ASA + CS	95%CI	P value
Believe 5ASA are very safe	94%	4.20	1.02-17.1	0.045	2.9	0.4-22	0.3
Believe 5ASA are not expensive	53%	1.45	0.88-2.3	0.140	1.3	0.7-2.6	0.4
Believe 5ASA mode-of-action may synergize with CS	60%	7.30	4-13.3	0.001	7.9	3.8-17	< 0.001
IBD expert	55%	0.63	0.39-1.03	0.070	0.6	0.3-1.2	0.14
Work in out-patient clinic setting	11%	3.70	1.3-11.1	0.010	2.7	0.6-12	0.2
Years of practice (odds ratio/yr)	-	-	-	-	0.97	0.94-0.99	0.04

5ASA: 5-Aminosalycilates; CS: Corticosteroids; IBD: Inflammatory bowel disease.

DISCUSSION

This study shows widely divergent practices among GI physicians and IBD experts with respect to prescribing 5ASA in combination with CS versus prescribing CS alone for patients with active UC. Nevertheless, the majority of experts elected to continue 5ASA in this scenario, despite the absence of evidence for a benefit of this combination. It is possible that some physicians who opt against administering 5ASA to acute UC patients are wary of bio-availability of orally administered drugs in this situation, but this question was not investigated in the present study. Many of the physicians professed a belief that a biologic additive or synergistic effect of 5ASA and CS is plausible and also perceive the safety profile of 5ASA as very good, presumably leading them to use concurrent 5ASA + CS. However, this is an unproven combination with associated costs, and 5ASA safety has not been specifically scrutinized in moderate-severe patients. Moreover, 5ASA have not been approved for moderate-severe active UC by any regulatory agency. Thus, evidence to support or refute the benefit of 5ASA in combination with CS should be sought to enable rational and evidence-based therapeutic decisions for these patients. Indirect evidence from studies of moderate-severe active UC treated with infliximab has not indicated a difference in response rate between sub-groups of patients treated or not with concomitant 5ASA[7]. However, data on concurrent 5ASA treatment in clinical trials of CS is sparse and even head-to-head comparisons of maximal mesalamine dosing with CS are lacking[8]. In retrospective cohorts not addressing this question directly, sub-groups of CS-treated patients with or without 5ASA fared similarly[9-11]. In an analysis of patients with CS-induced remission included in three clinical trials, patients who continued mesalamine after CS tapering had higher rates of maintained remission compared to patients on placebo maintenance[12]. Notwithstanding, this comparison may not be extra-polated to the dilemma of adding 5ASA to CS during the induction of remission treatment phase itself. In the only study to date directly addressing this question, there was statistically significant benefit in univariable analysis for reduced complications and need for salvage therapy among the 156 patients treated with combination 5ASA + CS compared to CS alone (n = 63)[13]. However, the benefit was not demonstrable on multi-variable analysis, raising the possibility of additional confounders playing a role in the observed results. In the absence of solid data to support or reject the use of 5ASA in combination with corticosteroids, controlled prospective data are imperative, and one such randomized controlled clinical trial has been launched[14].

Several limitations of the present study should be acknowledged. Respondents were approached directly by the sub-investigators, thereby making it impossible to definitely exclude a selection bias-by-acquaintance. However, post-hoc analyses showed that respondents approached by any single investigator still had very divergent response pattern (data not shown), arguing against a homogenous group of “think-alike” experts. Moreover, the present methodology allowed for a high response rate of > 50%. In contrast, the alternative survey methodology whereby physicians are picked from a professional society member list or similar non-personal method, notoriously yields low response rate of 10%-40%[5,6]. Such a low response rate may result in a different selection bias, whereby participating respondents are a minority of the targeted general population and not representative of it. Notably, as evidence is lacking, physician opinions as obtained here are empiric-based, and does not imply that the approach of the majority is necessarily the best therapeutic strategy. Another limitation of this concise questionnaire is that it did not include some additional items that may influence physicians’ choices, such as local availability of salvage therapies.

In conclusion, this global survey shows that GI and IBD experts have diverse 5ASA prescription practices for patients with moderate-severe active UC treated with CS. Nonetheless, despite the absence of data, the majority of experts endorse the use of combination 5ASA + CS for these patients. Possible adverse events - albeit rare - as well as medication costs should be borne in mind when making this decision. Conversely, experts who do not add 5ASA may be missing out on a relatively safe and possibly effective additive therapy. Thus, data from prospective clinical trials are direly needed for rational evidence-based decision in this common clinical scenario.

ACKNOWLEDGMENTS

The authors wish to thank Prof. Yan Chen, from The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China, and Prof. Min Zhi, from The Sixth Affiliated hospital of Sun Yat-Sen University, Guangzhou, China for their valuable help with study logistics and questionnaires distribution. The authors also wish to thank Prof. Benjamin Avida, Dr. Henit Yanai and Prof Dan Turner from Israel, for their help with questionnaire validation.

COMMENTS

Background

Patients with moderate-severe active ulcerative colitis are often treated with corticosteroids. Whether 5-aminosalycilates (5ASA) offer any benefit when combined with corticosteroids for these patients has not been explored. Moreover, it is unknown how do physicians treating acute ulcerative colitis (UC) patients make this therapy choice. If the addition of 5ASA offers even a small added benefit for this severely sick patients and saves a minority of them from the need for salvage therapy or urgent surgery, this could comprise an important simple tool for improving outcomes of these severely ill patients. Conversely, if this combination is no more efficacious then corticosteroids alone, then patients can be spared from a futile additional drug with its associated costs. Thus, this global survey explored the approach of expert gastroenterology physicians in 14 countries to combining 5ASA with corticosteroids to gain preliminary insight into real-life practice in this scenario and investigate factors driving this management decision.

Research frontiers

Although patients with moderate-severe UC are commonly treated with corticosteroids, roughly a third of them will not respond and require salvage therapy with infliximab or with cyclosporine and/or urgent colectomy. With these limited therapeutic options, investigations into factors that may increase rate of response to mainstay corticosteroid treatment are direly needed. This survey aims to map gastrointestinal (GI) experts’ strategy with respect to one such possible intervention, namely the addition of 5ASA to corticosteroids.

Innovations and breakthroughs

This is the first study to assess the practice of GI experts with respect to 5ASA usage during acute moderate-severe UC. It shows for the first time that despite the absence of evidence supporting this strategy, most physicians administer combination 5ASA with corticosteroids rather than corticosteroids alone. It also provides novel data about factors driving physicians’ decisions in this scenario, specifically showing this decision to be driven by mechanistic considerations unrelated to costs and safety of medication.

Applications

This study highlights an often overlooked clinical dilemma - whether to co-treat patients with moderate severe UC with combination 5ASA + corticosteroids or administer corticosteroids monotherapy. As such, it provides preliminary data and framework on which a controlled clinical trial can be based. It will also likely to make physicians more cognizant of this clinical decision, spurring further research into this - and other interventions - as possible avenues to increase the response rate to conventional non-costly and safe therapies in active UC.

Peer-review

Although this is a well written article and involves a lot of work.