Research Completed

Published Studies

Year Publication Categories
2023
Results from the COMPARE Study – How Do Different Medications Impact IBD Patients?

Summary

When IBD patients start taking a new medication, it can be hard to know if it will finally be the medication to help achieve remission, or if the side effects will impact sleep, social life, and ability to work. Over 400 IBD Partners participants took part in the COMPARE study to compare the effects of Entyvio vs. Stelara for Crohn's disease and Entyvio vs. Xeljanz for ulcerative colitis. Our patient partners identified fatigue and pain as outcomes of particular interest for this research to focus on.

For Crohn's disease, the study showed that there were no significant differences in the way Entyvio and Stelara affected patients' fatigue levels or the way pain impacted their lives. The results were similar for most other measures as well, although Stelara was associated with lower steroid use and more patients discontinued Entyvio.

For ulcerative colitis, study participants using Xeljanz experienced less pain as compared to participants using Entyvio. There were no significant differences in fatigue or other outcomes.

The results suggest that for both Crohn's disease and ulcerative colitis, patients generally function similarly with either medication. Patients and their physicians need to consider many factors that may influence which medication is right for them.

Full Published Manuscript for Crohn's Disease

Full Published Manuscript for Ulcerative Colitis


Keywords
COMPARE; Entyvio; Stelara; Xeljanz; vedolizumab; ustekinumab; tofacitinib; patient-reported outcomes; pain; fatigue; comparative effectiveness; Crohn s disease; ulcerative colitis;

Medications
2022
Urgency and its association with quality of life and clinical outcomes in ulcerative colitis patients

Summary

One of the hallmark symptoms of ulcerative colitis (UC) is urgency, the uncomfortable sensation of having to defecate immediately. Urgency might significantly impair a person's ability to travel, attend events, and leave the house without the knowledge of where the closest bathroom is. In this study, researchers evaluated the relationship between urgency and quality of life and other outcomes, like hospitalizations and surgery.

To read more, click here.


Full Published Manuscript

Keywords
urgency; quality of life; ulcerative colitis; uc;

Other
2021
Transition readiness curve in youth with IBD

Summary

Transition readiness is the set of knowledge and skills that young people need in order to manage their health as adults. The Transition Readiness Assessment Questionnaire (also called the TRAQ) is one measure of transition readiness.

We knew that transition readiness goes up as people get older, but we did not have a clear sense of the average transition readiness scores for people of different ages. This made it hard to tell what score we should expect for a particular person at a particular age.

To address this, we used data from IBD Partners. Participants in both IBD Partners and IBD Partners Kids & Teens between the ages of 12 and 21 chose to complete the TRAQ when they did surveys for IBD Partners. We took the results for anyone who had completed the TRAQ and looked at how the scores changed over time.

To read more click here.


Full Published Manuscript

Keywords
Pediatric;

Pediatric
2021
A Patient-Prioritized Agenda for Information Needs During the COVID-19 Pandemic: A Qualitative Study of Patients With Inflammatory Bowel Disease

Summary

Over the course of the COVID-19 pandemic, there has been a high level of patient demand for information about COVID-19 and its impacts on the inflammatory bowel disease (IBD) community. IBD Partners and the Crohn's & Colitis Foundation conducted a series of focus groups early on in the pandemic (between August and October of 2020). Focus groups are a form of group interview and are particularly useful for exploring people's knowledge and experiences.

The goals of the study were to 1) better understand the experiences of IBD patients during the COVID-19 pandemic and 2) identify knowledge gaps about IBD and COVID-19 and preferred methods of accessing information in order to make informed decisions.

To our knowledge, this is the first focus group study about the COVID-19 pandemic and the IBD community. In each focus group, participants with IBD talked about different fears, concerns, and questions related to the pandemic. They also discussed how and when they like to receive new information.

The findings of this study show the importance of the patient voice when deciding what to research and how to share those research findings with the public.


Full Scientific Manuscript

Keywords
covid; covid-19; vaccine; pandemic; focus group;

Other
2021
Posttraumatic Stress in Patients With Inflammatory Bowel Disease: Prevalence and Relationships to Patient-Reported Outcomes

Summary

Post-traumatic stress (PTS) is a chronic psychological reaction to an event where the person experiences actual or perceived threat to life or bodily harm. PTS symptoms include nightmares, flashbacks, irritability or low mood, feeling keyed up or on edge, and avoiding situations that trigger trauma memories.

Before this study, only one study on PTS and IBD, with 140 patients, had been conducted in the US. In the previous study, a much higher than expected proportion of patients (32%) reported moderate to severe symptoms of PTS. Because of the nature of IBD and its treatment, researchers aimed to see if there was a similar proportion of PTS in a larger patient sample through IBD Partners and to see how PTS symptoms are related to patient outcomes.

Researchers measured PTS symptoms in a large study of 797 participants using a standard symptom questionnaire and collected other data from IBD Partners including IBD disease activity, hospitalizations, surgeries, and quality of life. Researchers then looked at relationships between PTS symptom severity and each of these important IBD metrics. As expected, PTS was associated with more severe IBD, increased hospitalizations and surgeries, and increased anxiety, depression, fatigue, and pain impact in daily life. Researchers also found women, and racial and ethnic minorities were disproportionally affected by PTS.


Full Scientific Manuscript

Keywords
pts; post-traumatic stress; stress; trauma;

Mental Health,
Procedures and Testing
2020
Transition Readiness Not Associated With Measures of Health in Youth With IBD

Summary

Our objective was to describe the transition readiness (transitioning from child- to adult-centered healthcare) of children and young adults with inflammatory bowel disease (IBD) and study its relationships with age, sex, IBD activity, and measures of physical, psychological, and social health.

Participants in IBD Partners and IBD Partners Kids & Teens answered questions about demographics, IBD activity, transition readiness, health-related quality of life, and more.

In children and young adults with IBD, transition readiness was related to older age and female sex, but not IBD activity and other measures of physical, psychological, and social health.


Full Scientific Manuscript

Keywords
transition readiness; depression; anxiety; social health; quality of life; inflammatory bowel disease;

Lifestyle,
Health Maintenance
2019
A Novel Patient-Reported Outcome-Based Evaluation (PROBE) of Quality of Life in Patients With Inflammatory Bowel Disease

Summary

In this study, researchers were interested in creating a new, shorter survey to measure health related quality of life (HRQOL) in patients with IBD. To do this, they came up with new patient-reported survey questions and compared them to questions already being used. They were able to create a shorter, 6-question survey known as the PROBE that measures HRQOL just as well as longer instruments. The researchers believe that this shorter survey will make it easier to assess HRQOL among patients with Crohn's disease and ulcerative colitis when providers treat patients in the clinic, and when IBD is eva luated in future research studies.


Full Scientific Manuscript

Keywords
quality of life;

Lifestyle
2018
High Patient Activation Is Associated With Remission in Patients With Inflammatory Bowel Disease

Summary

Research has shown that patients with chronic diseases have better health outcomes if they are knowledgeable, skilled and confident in managing their disease. In this study, researchers wanted to find out if this is true for patients with IBD. To evaluate this, they delivered a survey called the Patient Activation Measure to 1,486 patients with IBD. Based on this survey, patients are placed on one of four levels. The lowest level is Level 1, "disengaged and overwhelmed." The highest level is Level 4, "maintaining behaviors and pushing further." Follow-up data available for 1082 survey participants (73%) showed that patients with high activation (levels 3 or 4) were more likely than those with low activation (levels 1 or 2) to be in clinical remission 6-12 months after the initial survey assessment.


Full Scientific Manuscript

Keywords
patient activation; PAM; Patient Activation Measure; surgery; Crohn s disease; CD; ulcerative colitis; UC; remission;

Lifestyle,
Health Maintenance
2018
Social Media Use and Preferences in Patients With Inflammatory Bowel Disease

Summary

There has been growing interest in the use of social media for managing chronic illnesses. Few studies have examined how patients with Inflammatory Bowel Disease utilizes social media as a tool for managing their health. In this study we surveyed patients in Crohn's and Colitis Foundation partner's database to get a better understandings of patient's preferences for social media usage. We found that 32% of IBD patients utilized social media for disease management. We also found that the majority of patients were unsure of the quality of IBD related information posted on social media and most agree d that the quality could be improved if the Crohn's and Colitis Foundation contributed to posts. The leading concerns surrounding social media use were privacy/confidentially and lack of trust of information posted. In summary, IBD patients expressed interest in utilizing social media to aid in the management of their disease, though lack of knowledge about quality exists as do concerns about the privacy/confidentially of posts.


Full Scientific Manuscript

Keywords
social media; digital health;

Lifestyle
2018
Crohn s and Colitis Foundation of America Partners Patient-Powered Research Network - Patient Perspectives on Facilitators and Barriers to Building an Impactful Patient-Powered Research Network

Summary

Successful patient-powered research networks (PPRNs) can improve health behaviors and outcomes. Researchers for this study wanted to better understand how a PPRN might meet the needs of people with inflammatory bowel disease (IBD). To do this, they sought feedback from members of the IBD community through focus groups and phone interviews. Focus group discussions were designed to understand participants' experiences and needs managing their disease. Discussions also explored the outcomes most important to participants and ways to make a PPRN most useful. Individual interviews were used to assess different design prototypes of the patient portal user interface and explore ways the portal could help track and manage IBD while simultaneously contributing to research. The research found that participants were more willing to participate in the PPRN if the knowledge gained from research studies would benefit both society and the individual. However, participants were concerned about the credibility of online resources, pharmaceutical industry profiting from their data, data security, and the time it would take to participate in a PPRN. Participants expressed that they wanted a true and equal partnership in every phase of building a PPRN. They also felt it was important to have access to personal health records and be able to track health status and symptoms. This feedback was incorporated into the design of the IBD Partners PPRN.


Full Scientific Manuscript

Keywords
PPRN; Disease management; Online resources;

Lifestyle,
Health Maintenance,
Research Methods
2018
Paternal Disease Activity Is Associated With Difficulty inConception Among Men With Inflammatory Bowel Diseases

Summary

IBD commonly affects men and women during their reproductive ages. Because of this, researchers are interested in knowing how the disease affects fertility and pregnancy. Much research on the impact of IBD on fertility and pregnancy has focused on women, but for this study, researchers focused on men. They wanted to know how men's IBD and their use of IBD medication affect reproductive outcomes. The study results showed that men who received a diagnosis of IBD before trying to conceive were more likely to have difficulty conceiving than men who developed IBD after conceiving. However, these fi ndings were noted only in those with recently active disease within the past 6 months. Men with IBD who were in long-term remission were similar to the rates prior to development of IBD. Exposure to any of the medications for treating IBD was not associated with congenital anomalies, low birth weight or preterm births.


Full Scientific Manuscript

Keywords
paternal; disease activity; men; fertility; pregnancy;

Lifestyle,
Health Maintenance
2018
Body Image Dissatisfaction in Pediatric Patients with Inflammatory Bowel Diseases

Summary

Children and teenagers with Inflammatory Bowel Disease (IBD) are at increased risk of being unhappy with their body image. This study aimed to learn more about how common body image dissatisfaction (or "BID") is among these children and teenagers and to see if we could point to any risk factors for having BID. A total of 664 participants in the IBD Partners Kids & Teens study, ages 9-18, completed an online survey about anxiety, depression, disease activity, and quality of life. We found that about 3% of participants met the criteria for having BID by selecting the answer choices "I look awful" or "I look bad" when asked about their appearance. Young patients with BID tended to have worse disease, to be taking steroids, to be female, and to be diagnosed at an older age. These participants were also much more anxious and depressed than those who were satisfied with their appearance. Pediatric patients with BID should discuss these concerns with their physicians and healthcare teams.


Full Scientific Abstract

Keywords
body image; body image dissatisfaction; BID, anxiety; depression; mood disorder; psychosocial; pediatric; children; kids; K&T; kids & teens; IBD Partners Kids & Teens;

Lifestyle,
Health Maintenance,
Mental Health
2017
Symptom Clusters in Adults with Inflammatory Bowel Disease

Summary

Symptoms (pain, fatigue, sleep disturbance, depression, and anxiety) are common among people with Inflammatory Bowel Disease (IBD). We know people do not experience only one symptom and symptoms may occur is clusters. Symptom clusters are two or more symptoms that occur together and are related. Understanding how symptoms cluster is needed so that we can develop methods that decrease multiple symptoms in IBD. The purpose of this study was to (a) describe how symptoms cluster in IBD, and (b) to describe the relationship between demographic and clinical factors and symptom cluster membership.

In this study, we used the CCFA Partners Cohort and the symptoms of pain interference, fatigue, sleep disturbance, anxiety, and depression. There were 5,296 participants with an average age of 44 years, and the sample was 72% female. We discovered four symptom cluster groups. The first group was labeled "low symptom burden" (26%), and this group had symptoms of pain, fatigue, sleep disturbance, depression, and anxiety. The second, and largest group (38%) was labeled "high symptom burden," and included pain, fatigue, sleep disturbance, depression, and anxiety. The third group included 22.09% of participants, was labeled "physical symptoms," and had the symptoms of pain, fatigue, and sleep disturbance. The fourth group "psychological symptoms," was the smallest group at 14.22%, and included the symptoms of anxiety and depression. Being female, having a history of smoking, currently taking corticosteroids, Crohn's disease, and active disease state were associated with belonging to the high symptom burden group compared to the low symptom burden group. Additional research is needed to test strategies that may be effective at reducing symptoms in people with IBD.


Full Scientific Manuscript

Keywords
symptom clusters; pain; fatigue; sleep disturbance; depression; anxiety; low symptom cluster; high symptom cluster; Crohn s disease; CD; ulcerative colitis; UC ;

Study Updates,
Medications,
Treatment
2017
Obesity Is Associated with Worse Disease Activity in Patients with Inflammatory Bowel Diseases: an Internet Based Cohort Study

Summary

More than 1/3 of adults in the US are obese and the rates of obesity are increasing. However, relatively little is known about the prevalence of obesity in patients with inflammatory bowel disease (IBD) or the impact of obesity on IBD disease activity. In this study, we reviewed patients in the CCFA Partners database to better understand these issues. We found that approximately 30% of IBD patients were overweight and an additional 20% were obese. Patients who were overweight or obese were less likely to have their IBD in remission at baseline. We also found that patients who were obese (but not overweight patients) were more likely to have a relapse of their IBD within 6-12 months compared to normal weight patients. In summary, obesity appears to be relatively common amongst patients with IBD and may be a risk factor for worsened disease.


Full Scientific Abstract

Keywords
comorbidity; obese; obesity; overweight; nutrition; patient reported outcomes;

Study Updates,
Lifestyle
2016
Patient-Reported Outcomes and Quality of Life in Patients with Ileal Pouch-Anal Anastomosis (IPAA)

Summary

Between 20-35% of patients with ulcerative colitis (UC) have had a colectomy (surgery to remove part or all of the large intestine). The most common type of colectomy is called a "restorative proctocolectomy with ileal pouch-anal anastomosis (IPAA)". This is a surgery to remove the large intestine and rectum and to create a small pouch out of the small intestine that is connected to the anus. This pouch is used to store stool and is often called a "J-pouch" (It is shaped like the letter "J"). Pouchitis (inflammation of the pouch) is the most common complication of this type of surgery and consists of symptoms of diarrhea and urgency. In this study, we wanted to know how many CCFA Partners participants have experienced pouchitis and what medications and characteristics are common among this group. To answer these questions we looked at survey responses submitted by more than 15,000 CCFA Partners participants. We found that 248 patients reported having an IPAA at some point in time. Of these patients, 82% also reported at least one episode of pouchitis. Patients with a history of pouchitis were more likely to use antibiotics. Patients who reported a recent episode of pouchitis (within the past six months) were more likely to report worse quality of life, depression, fatigue, and dissatisfaction with their social role. The majority of patients who have had a colectomy develop pouchitis at some point. During episodes of pouchitis, patients experience worse quality of life.


Full Scientific Abstract

Keywords
IPAA; Ileal Pouch Anal Anastamosis;

Lifestyle,
Surgery,
Medications
2016
Collecting Biospecimens from an internet-based cohort study of inflammatory bowel disease (CCFA Partners): A feasibility study

Summary

CCFA Partners has been successful for survey-based research for many years. The purpose of this study was to determine whether or not it would be feasible to use the CCFA Partners Internet-based platform to collect biologic or biospecimen data such as saliva, blood and stool samples. We found that nearly 40% of participants contributed saliva and about 25% contributed blood samples. The majority of participants who contributed saliva or blood also sent a stool sample. All samples provided sufficient quantity and quality of material for genetic testing. Saliva and blood samples were genotyped for common mutations ("single nucleotide polymorphisms") known to be associated with inflammatory bowel disease. Stool samples were analyzed for bacterial content, which may be related to inflammatory bowel disease. Overall, this study supports that it is feasible to collect biospecimens using an Internet-based platform and will be successful on a larger scale to be used for many different types of research.


Full Scientific Manuscript

Keywords
biospecimen; biobank; biobanking; specimen; biospecimen handling; healthcare; genetic testing;

Research Methods
2015
Keep or Destroy? Attitudes of Patients With Inflammatory Bowel Diseases on Biospecimen Handling at Biobank Closure

Summary

A biobank is a collection of samples from patients (including spit, stool or blood). Biobanks are important for understanding risk factors for developing disease or for severity of disease. The purpose of this study was to understand how patients with inflammatory bowel diseases (IBD) feel about the continued use of their samples after the biobank has closed. A total of 26 CCFA Partners members participated in a phone interview about the risks and benefits of their samples being used for research, and the results of these conversations were used to create a survey. The survey included three primary themes: 1) degree to which samples remain an individual's property after donation; 2) samples are a good that can be sold; and 3) the belief that results from sample analysis could lead to discrimination. About 1,000 CCFA Partners participants completed the survey online. Most participants expressed the desire to know what would happen to their samples and genetic information if the biobank closed. Most were comfortable with the samples and genetic information being destroyed. Most were also comfortable donating their samples and genetic information to IBD research. Most participants were not comfortable with selling their samples and genetic information after the biobank closes. We learned that it is important for researchers to create a plan for samples if the biobank closes and to communicate this plan to the participant at the beginning of the study.


Full Scientific Abstract

Keywords
biospecimen; biobank; biobanking; specimen; biospecimen handling; consent; informed consent; genetic testing;

Research Methods
2015
Medication Utilization and the Impact of Continued Corticosteroid Use on Patient-Reported Outcomes in Elderly Patients with Inflammatory Bowel Disease

Summary

Older patients with inflammatory bowel disease, or IBD, often have higher rates of hospital stays and disease complications. Past studies have shown that medical treatment plans for older IBD patients may be different than those for younger patients. One difference is that treatment plans for older IBD patients involve increased use of 5-aminosalicylates (5-ASA) and corticosteroids. It is not known how continuous use of steroids by older patients affects anxiety, depression, sleep, and fatigue. Using data from CCFA Partners surveys we wanted to 1) describe medication use in older versus younger IBD patients and 2) determine whether continuous use of steroids by older patients leads to differences in anxiety, depression, sleep, and fatigue. We found that medication use is different among older patients. Older patients with Crohn's disease have more continued steroid use than younger patients. Continued steroid use was associated with worsened anxiety, sleep, and fatigue. Also, steroid use alone in older Crohn's disease patients was associated with increased depression and anxiety. As in younger IBD patients, our findings support limiting the continuous use of steroids for treatment of IBD in older populations.


Full Scientific Manuscript

Keywords
geriatric; elderly; age; steroid; corticosteroid; drugs ;

Medications,
Lifestyle
2015
Exercise Decreases Risk of Future Active Disease in Patients with Inflammatory Bowel Disease in Remission

Summary

Little is known about how exercise impacts disease activity in patients with inflammatory bowel disease (IBD). This study explored the relationship between exercise level and disease activity in a large group of patients with IBD in remission. A total of 1,857 patients from the CCFA Partners cohort participated by answering online questions about their exercise level and disease activity at the beginning of the study (in remission) and then again after six-months. We found that participants with Crohn's disease who reported higher levels of exercise at the beginning of the study were significantly less likely to report active disease six-months later. We also found this association among participants with ulcerative colitis (UC) and indeterminate colitis (IC), but the results were not significant. Results of this study suggest that for patients with Crohn's disease (and possibly for patients with UC and IC) who are in remission, higher levels of exercise may reduce the risk of developing active disease in the short-term.


Full Published Manuscript

Keywords
active disease; flare; prevention; risk;

Exercise,
Lifestyle,
Alternative Therapies,
Health Maintenance
2014
Perceptions of Patients with Inflammatory Bowel Diseases on Biobanking

Summary

A biobank is a collection of samples from patients (including spit, stool or blood). Biobanks are very important for understanding risk factors for developing disease or for severity of disease. We wanted to understand more about why patients with inflammatory bowel disease (IBD) would or would not participate in a biobank. We first did a series of interviews over the phone with patients who were participating in the CCFA Partners study. This helped us to understand the important concerns about biobanks and develop a survey for use in CCFA Partners. We then sent a survey to over 800 people with IBD in CCFA Partners. We did a total of 26 phone interviews. Patients doing the interviews told us that they had concerns about how samples would be collected/stored; who would be allowed access; whether these samples would be used for other things (not only research); and whether this would affect whether they could get life insurance. Most people were not that worried about using the blood for genetic studies. People thought that that biobanks were important for research, that they might lead to a cure; that by donating they would be helping others or family members with IBD; and hoped that they might personally benefit, although most understood that they likely would not. These themes aided in the development of a survey instrument to assess perceptions of biobanking. A total of 476 people initially finished the survey. Almost 40% said that they would 'definitely yes' donate samples, 56.0% would 'probably yes' donate, 5.1% 'probably no' and 0.7% 'definitely no'. There were no factors that made someone more likely to donate (reported donation rates were not different for Crohn's disease (CD) versus ulcerative colitis (UC), remission versus active disease, or education level. People were most willing to donate spit, followed by blood and lastly stool. Knowing these important thoughts on sample donation/biobanks will help researchers to develop consents for IBD biobanks and design educational materials on biobanks for IBD A biobank is a collection of biological samples, such as saliva, blood, and stool, from individuals with a common condition such as inflammatory bowel disease (IBD). Biobanks are important for understanding risk factors for developing disease or for severity of disease. We wanted to learn more about IBD patients' understanding of and willingness to participate in a biobank. We first did 26 phone interviews with patient volunteers participating in the CCFA Partners study. Those interviews helped us better understand concerns related to biobanks. Patients doing the interviews told us that they had concerns about how samples would be collected/stored, who would be allowed access, whether these samples would be used for anything other than research, and whether participation in a biobank would affect life insurance eligibility. Most patients were not that worried about using blood for genetic studies. Participants thought biobanks were important for research, that they might lead to a cure, that by donating they would be helping others or family members with IBD, and hoped that they might personally benefit. These results from the phone interviews were used to develop an online survey instrument to assess perceptions of biobanking. In a larger sample, a total of 1,007 people with IBD completed the online survey. Almost 40% said they would 'definitely' donate samples, 56.4% would ‘probably’ donate, 3.6% ‘probably not’, and 0.6% 'definitely not'. There were no differences in willingness to donate specimens based on disease type (Crohn's vs. ulcerative colitis) or on disease activity (in remission vs. currently active disease). People were most willing to donate saliva specimens, followed by blood and lastly stool samples. Knowing these important attitudes and beliefs about sample donations and biobanks will help researchers develop consents and educational materials related to biobanks that will encourage wider involvement.


Full Published Manuscript

Keywords
biobanking; sample collection; sample storage, confidentiality; HIPAA; community; population;

Research Methods,
Study Updates
2013
Development of CCFA Partners Kids & Teens: an Internet-Based Cohort of Pediatric IBD

Summary

After the successful launch of CCFA Partners for adult patients with inflammatory bowel disease, the kids and teens component (CCFA Partners Kids & Teens) started in 2013. In partnership with the Crohn's and Colitis Foundation of America (CCFA), children <18 years of age were asked to join the internet-based study through email invitations and promotion on social media sites. After informed consent, the children and their parents completed surveys asking questions about their disease, their medications and other patient reported outcomes (such as quality of life, fatigue, sleep, peer relations, mood, etc). In the first month, 419 children joined. The average age was 13, with about 1/2 being female and about 3/4 having Crohn's disease (CD). Common medications used by patients with CD were biologics, thiopurines (6mp or azathioprine) or mesalamine-based medications (Pentasa, Lialda, Apriso, etc). The most common medication for patients with ulcerative colitis (UC) was mesalamine-based medications. Most of the CD patients were in remission and most UC patients had mild disease. Children who had active disease had more depression and anxiety. Following this group of children over time will help us to learn a great deal about living with IBD as a child, and will allow us to follow these children into adulthood to learn even more about the disease itself, the impact of medications, and how symptoms change over time.


Full Scientific Abstract

Keywords
kids & teens; K&T; pediatric; age; kids; teens; community; population; resource;

Research Methods,
Study Updates