Michiel Van Nieuwenhoven

Michiel Van Nieuwenhoven


Research Focus & Metrics

Academic Career Length

6Years (2021-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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12 January 2022 in Family Practice
Verified
Journal Article
Open access
PDF file
QSQays Shahed
Qays Shahed
KBKarolina Baranowska
Karolina Baranowska
MGMarije C Galavazi
Marije C Galavazi
YCYang Cao
Yang Cao
MNMichiel Van Nieuwenhoven
Michiel Van Nieuwenhoven
Background: Obesity is associated with stigma and discrimination. Health care providers should approach these patients professionally and without stigma, since treatment of obesity requires a relationship with mutual understanding between the doctor and patient. Objective: To explore how patients and general practitioners (GPs) perceive obesity, using Q-methodology, which allows quantitative analysis of qualitative data. Methods: A Q-methodology study, comprising 24 patients with obesity and 24 GPs. We created 48 statements with viewpoints on obesity. All participants sorted these statements in a forced grid with a quasi-normal distribution ranking from −5 (most disagree) to +5 (most agree). Subsequently, factor analysis was performed. Six patients were interviewed to explain their viewpoints. Results: Analysis yielded 3 dominant groups (factors) of patients: (i) They acknowledge the importance of healthy lifestyle and feel mistreated by health care. (ii) They have a decreased quality of life, but do not blame health care, and (iii) They don’t need treatment and don’t have an impaired quality of life. For the GPs, the 3 dominant factors were: (i) They have understanding for the patients and feel that health care is insufficient, (ii) They believe that obesity may be hereditary but mainly is a lifestyle problem, and (iii) They believe obesity can be treated but is very difficult. Conclusions: Viewpoints on obesity were different, both within and between the groups. Some GPs consider obesity mainly as a lifestyle problem, rather than a chronic disease. If patients and doctors can find mutual viewpoints on obesity, both patient satisfaction and a treatment strategy will be more effective.

22 March 2021 in Scandinavian Journal of Gastroenterology
Verified
Journal Article
Open access
EAEmilia Andersson
Emilia Andersson
NNNils Nyhlin
Nils Nyhlin
MNMichiel Van Nieuwenhoven
Michiel Van Nieuwenhoven
To shorten the time for diagnosis of suspected colorectal cancer (CRC), a standardized colorectal cancer referral pathway (CCRP) was introduced in Sweden in September 2016. However, the effects of the CCRP are still uncertain, and CRC is also found in patients undergoing a routine colonoscopy. To identify all CRC-cases in the Region Örebro County and to investigate via which diagnostic pathway they were diagnosed. Furthermore, to investigate the reasons for and possible effect of not being included in the CCRP for cases found via colonoscopy. Review of medical records of patients with CRC referred to the department of surgery in the Region Örebro County in 2016–2018 (n = 459). In CRC-cases found through colonoscopy (n = 347), 37.5% were diagnosed via a routine waiting list and 62.5% within the CCRP. No difference in tumor stage or tumor grade was found between the two groups. The non-CCRP showed a longer time to diagnosis than the CCRP group (21.5 days, IQR 7–43 vs. 13 days, IQR 8–17 (p < .001), respectively). Non-rectal cancer was more common in the non-CCRP group (81.5% vs. 57.6%, p < .001). The non-CCRP group had lower median Hb-value (106, IQR 87–129 vs. 117, IQR 101–136, p = .001). 85% of the non-CCRP group was found to meet one or more CCRP referral criteria, with bleeding anemia being the dominant criterion to meet. The CCRP did not appear to improve prognostic outcomes for CRC-patients. ClinicalTrials.gov Identifier: NCT04585516

1 January 2024 in Therapeutic Advances in Gastroenterology
Verified
Journal Article
Open access
LNLac Nguyen
Lac Nguyen
NRNoora Räsänen
Noora Räsänen
FBFilippa Berggren
Filippa Berggren
MNMichiel Van Nieuwenhoven
Michiel Van Nieuwenhoven
Background: Esophagogastroduodenoscopy (EGD) is the gold standard method for diagnosing upper gastrointestinal (GI) pathology. Swedish guidelines recommend patients over 50 years with new-onset dyspeptic symptoms undergo direct gastroscopy to rule out malignancy. However, the incidence of dysplasia or cancer in patients aged 61–70 years remains unclear. Objectives: To investigate the referral factors and endoscopic findings in patients aged 61–70 years and compare the result with age groups 51–60 and 41–50 years from our previous studies to establish whether there is an age cutoff for upper GI cancer risk. Design: A retrospective observational study was conducted to evaluate EGD referrals and outcomes in patients aged 61–70 years. Methods: We analyzed EGD referrals for patients aged 61–70 years within Region Örebro County from January 2019–April 2020 to January 2022–2023. Clinical data, including symptoms, medications, and laboratory results, were collected from medical records. Statistical analysis, including odds ratios (OR) and positive predictive values (PPV), was conducted to evaluate pathological outcomes based on referral factors. Results: A total of 1003 referrals were analyzed. Statistically significant differences in pathological findings were observed between the 41–50 years reference group and the older groups (51–60 years: OR 2.08, p < 0.001; 61–70 years: OR 3.05, p < 0.001). However, no statistically significant difference in cancer incidence was found between the age groups. Conclusion: The most common pathological findings were benign, including hiatal hernia, gastroesophageal reflux disease/esophagitis, or gastritis. The incidence of cancer was low in all three groups. These results suggest that the “test-and-treat” strategy, currently recommended for patients under 50 years, may be appropriate for patients aged 51–70 years as well. Trial registration: NCT04585516.

28 September 2023 in Cancers
Verified
Journal Article
Open access
PDF file
LULinnea Uebel
Linnea Uebel
IKIndy Kromodikoro
Indy Kromodikoro
NNNils Nyhlin
Nils Nyhlin
MNMichiel Van Nieuwenhoven
Michiel Van Nieuwenhoven
Background: Fast-track pathways for diagnosing colorectal cancer (CRC) have been implemented in several European countries. In Sweden, a substantial number of CRC are diagnosed via the Swedish Standardized Course of Care for colorectal cancer (SCC-CRC). We evaluated the SCC-CRC in terms of CRC yield, and predictive values and odds ratios (OR) for the entry criteria. Methods: We retrospectively analyzed all 2539 patients referred for SCC-CRC colonoscopy between September 2016 and December 2020. Entry criteria and colonoscopy outcomes were analyzed. Results: CRC yield was 16.4%. Highest positive predictive values (PPVs) were seen for abnormal radiology (PPV 30.5%, OR 4.7 (95% CI 3.4–6.4) p < 0.001), abnormal rectal examination (PPV 28%, OR 3.6 (95% CI 2.7–4.8) p < 0.001), and anemia (PPV 24.8%, OR 2.2 (95% CI 1.5–3.1) p < 0.001). Some entry criteria showed no significant risk increase, i.e., visible blood in stool/rectal bleeding, change in bowel habits, and the combination of changed bowel habits plus anemia. A positive fecal immunochemical test (FIT), although not part of the SCC-CRC, showed the highest OR: 9.9 (95% CI 4.5–21.7) p < 0.001) and PPV of 18.8%. Conclusions: CRC yield from the SCC-CRC is slightly higher compared to other European fast tracks. A number of entry criteria showed no benefit towards assessing CRC risk. FIT testing should be included in CRC fast tracks to increase diagnostic efficacy.

30 July 2021 in European Journal of Gastroenterology & Hepatology
Verified
Journal Article
Closed access
NRNoora Räsänen
Noora Räsänen
MNMichiel Van Nieuwenhoven
Michiel Van Nieuwenhoven
Background and aim: Diagnostic guidelines for the investigation of dyspepsia for patients <50 years have been implemented. However, it is unsure whether these guidelines are used appropriately. We aimed to investigate the adherence to the national guidelines of uninvestigated dyspepsia and to examine the prevalence of upper gastrointestinal pathology in patients 18–50 years. We also aimed to detect any possible risk factors for pathology in esophagogastroduodenoscopy referrals and to evaluate differences between referrals from the hospital and primary health care. Method: This is a retrospective review of medical records including patients who underwent esophagogastroduodenoscopy between January 2019 and April 2020 (n = 1809). Odds ratios (OR), positive predictive values (PPV), negative predictive values (NPV), chi-square and Mann–Whitney U-tests were applied. Results: In total 1708 patients were included, of whom 43.6% (n = 744) had a pathologic finding. Age group 41–50 years showed the highest prevalence with an OR 1.34 [95% confidence interval (CI), 1.07–1.69]. Helicobacter pylori testing was performed in 21.1% (n = 167) of patients with dyspepsia lacking alarm symptoms (n = 791). PPV and OR were generally low for a pathologic esophagogastroduodenoscopy. The absence of alarm symptoms showed a high NPV for significant pathology (98.7–99.6%). Significant pathology was almost exclusively found in hospital-based referrals. Conclusions: Esophagogastroduodenoscopy is widely performed in young adults, often without significant findings. Adherence to the national guidelines was poor. No referral factors were associated with a significant risk for a pathologic finding. Esophagogastroduodenoscopy based on primary healthcare referrals demonstrated almost exclusively benign pathology. Significant pathology was only found via hospital-based referrals.

2 September 2024 in Journal of Clinical Gastroenterology
Verified
Journal Article
Open access
IAIzz El Deen Alkhadraa
Izz El Deen Alkhadraa
LULinnea Uebel
Linnea Uebel
IKIndy Kromodikoro
Indy Kromodikoro
MNMichiel Van Nieuwenhoven
Michiel Van Nieuwenhoven
Background: In 2021, a nation-wide screening program for colorectal cancer (CRC) was step-wise implemented in Region Örebro County (RÖC) for patients aged 60 to 74 years, utilizing the fecal immunochemical test (FIT) to refer patients for colonoscopy. Concurrently, the standardized care course for colorectal cancer (SCC-CRC), initiated in 2016, employs a fast-track pathway for patients with alarm symptoms to undergo colonoscopy. This study compares CRC screening colonoscopies with SCC-CRC colonoscopies in RÖC among patients aged 60 to 67 years. Methods: An initial analysis of the Swedish colorectal screening cohort was combined with a retrospective cohort study, analyzing data from 307 CRC screening patients and 441 age-matched SCC-CRC patients in RÖC. Data included demographics, colonoscopy participation rates, and pathology findings. Statistical analyses compared outcomes between the 2 groups. Results: Among the screening group, 2% tested positive for FIT, with an 86% colonoscopy participation rate (N=9296). In RÖC, 266 screening patients underwent colonoscopy, with 10% diagnosed with CRC, compared with 20% in the SCC-CRC group. In addition, 39% of the screening group in RÖC were diagnosed with advanced adenomas, versus 15% in the SCC-CRC group Conclusions: Screening participation was high, with effectiveness aligning with international counterparts. The SCC-CRC pathway excels in diagnosing CRC among symptomatic patients, while the nationwide screening program is effective in early detection of CRC and advanced adenomas. underscoring the importance of integrating and optimizing both approaches within the Swedish health care system to optimize CRC prevention and management.