Elferink M.A.G.,Netherlands Comprehensive Cancer Organisation |
de Jong K.P.,University of Groningen |
Klaase J.M.,Spectrum |
Siemerink E.J.,Ziekenhuis Groep Twente |
de Wilt J.H.W.,Radboud University Nijmegen
International Journal of Colorectal Disease | Year: 2014
Purpose: The main cause of death of colorectal cancer patients is metastatic disease. Approximately 20–25 % of the patients present with metastases at time of diagnosis. The clinical course of patients who develop metachronous metastases, however, is less clear. The aims of this study were to describe the incidence, treatment and survival of patients with metachronous metastases from colorectal cancer and to determine risk factors for developing metachronous metastases.Methods: From the Netherlands Cancer Registry, patients diagnosed with colorectal carcinoma in the period 2002–2003 in North-East Netherlands were selected. Patients were followed for 5 years after diagnosis of the primary tumour. Kaplan-Meier method and Cox regression analyses were used to determine predictors for developing metastases and to analyse overall survival.Results: In total, 333 of 1743 (19 %) patients developed metachronous metastases. The majority (83 %) of these metastases were diagnosed within 3 years, and the most frequent site was the liver. Patients with advanced stage and patients with tumours in the descending colon or in the rectum were more likely to develop metastases. Approximately 10 % of all patients underwent intentionally curative treatment for their metastases, with a 5-year survival rate of 60 %. Treatment of metastases and pathologic N (pN) status were independent prognostic factors for overall survival.Conclusions: Site and stage of the primary tumour were predictors for developing metachronous metastases. A limited number of patients with metastatic disease were treated with a curative intent. These patients had a good prognosis. Therefore, focus should be on identifying more patients who could benefit from curative treatment. © 2014, Springer-Verlag Berlin Heidelberg.
Aan De Stegge W.B.,Hospital Group Twente |
Van Leeuwen B.L.,University of Groningen |
Elferink M.A.G.,Netherlands Comprehensive Cancer Organisation |
De Bock G.H.,University of Groningen
PLoS ONE | Year: 2016
Background: Improvement in survival of patients with colon cancer is reduced in elderly patients compared to younger patients. The aim of this study was to investigate whether the removal of ≥ 12 lymph nodes can explain differences in survival rates between elderly and younger patients diagnosed with colon cancer. Methods: In a population-based cohort study, all patients (N = 41,074) diagnosed with colon cancer stage I to III from 2003 through 2010 from the Netherlands Cancer Registry were included. Age groups were defined as <66, 66-75 and >75 years of age. Main outcome measures were overall and relative survival, the latter as a proxy for disease specific survival. Results: Over an eight years time period there was a 41.2% increase in patients with ≥12 lymph nodes removed, whereas the percentage of patients with the presence of lymph node metastases remained stable (35.7% to 37.5%). After adjustment for patient and tumour characteristics and adjuvant chemotherapy, it was found that for patients in which ≥12 lymph nodes were removed compared to patients with <12 lymph nodes removed, there was a statistically significant higher overall survival (<66: HR: 0.858 (95% CI, 0.789- 0.933); 66-75: HR: 0.763 (95% CI, 0.714-0.814); >75: HR: 0.734 (95% CI, 0.700-0.771)) and relative survival (<66: RER: 0.783 (95% CI, 0.708-0.865); 66-75: RER: 0.672 (95% CI, 0.611-0.739); >75: RER: 0.621 (95% CI, 0.567-0.681)) in all three age groups. Conclusions: The removal of ≥12 lymph nodes is associated with an improvement in both overall and relative survival in all patients. This association was stronger in the elderly patient. The biology of this association needs further clarification. © 2016 aan de Stegge et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Simkens L.H.J.,University of Amsterdam |
Van Tinteren H.,Netherlands Cancer Institute |
May A.,University Utrecht |
Ten Tije A.J.,Amphia Hospital |
And 20 more authors.
The Lancet | Year: 2015
Background The optimum duration of first-line treatment with chemotherapy in combination with bevacizumab in patients with metastatic colorectal cancer is unknown. The CAIRO3 study was designed to determine the efficacy of maintenance treatment with capecitabine plus bevacizumab versus observation. Methods In this open-label, phase 3, randomised controlled trial, we recruited patients in 64 hospitals in the Netherlands. We included patients older than 18 years with previously untreated metastatic colorectal cancer, with stable disease or better after induction treatment with six 3-weekly cycles of capecitabine, oxaliplatin, and bevacizumab (CAPOX-B), WHO performance status of 0 or 1, and adequate bone marrow, liver, and renal function. Patients were randomly assigned (1:1) to either maintenance treatment with capecitabine and bevacizumab (maintenance group) or observation (observation group). Randomisation was done centrally by minimisation, with stratification according to previous adjuvant chemotherapy, response to induction treatment, WHO performance status, serum lactate dehydrogenase concentration, and treatment centre. Both patients and investigators were aware of treatment assignment. We assessed disease status every 9 weeks. On first progression (defined as PFS1), patients in both groups were to receive the induction regimen of CAPOX-B until second progression (PFS2), which was the study's primary endpoint. All endpoints were calculated from the time of randomisation. Analyses were done by intention to treat. This trial is registered with ClinicalTrials.gov, number NCT00442637. Findings Between May 30, 2007, and Oct 15, 2012, we randomly assigned 558 patients to either the maintenance group (n=279) or the observation group (n=279). Median follow-up was 48 months (IQR 36-57). The primary endpoint of median PFS2 was significantly improved in patients on maintenance treatment, and was 8·5 months in the observation group and 11·7 months in the maintenance group (HR 0·67, 95% CI 0·56-0·81, p<0·0001). This difference remained significant when any treatment after PFS1 was considered. Maintenance treatment was well tolerated, although the incidence of hand-foot syndrome was increased (64 [23%] patients with hand-foot skin reaction during maintenance). The global quality of life did not deteriorate during maintenance treatment and was clinically not different between treatment groups. Interpretation Maintenance treatment with capecitabine plus bevacizumab after six cycles of CAPOX-B in patients with metastatic colorectal cancer is effective and does not compromise quality of life. Funding Dutch Colorectal Cancer Group (DCCG). The DCCG received financial support for the study from the Commissie Klinische Studies (CKS) of the Dutch Cancer Foundation (KWF), Roche, and Sanofi-Aventis. © 2015 Elsevier Ltd.
van den Hurk C.J.G.,Netherlands Comprehensive Cancer Organisation |
Winstanley J.,University of Sydney |
Young A.,University of Warwick |
Boyle F.,University of Sydney
Supportive Care in Cancer | Year: 2015
Data on chemotherapy-induced alopecia (CIA) as a side effect of cancer treatment are scarce. CIA is given minimal attention in clinical trials and in the literature. However, when asking the patients with cancer for their opinion, CIA appears to have a major impact, particularly on body image and quality of life. Currently, there is no commonly used measure to evaluate CIA; It is time to improve the management and measurement of CIA. © 2015, Springer-Verlag Berlin Heidelberg.
Aben K.K.H.,Netherlands Comprehensive Cancer Organisation |
Aben K.K.H.,Radboud University Nijmegen |
Osanto S.,Leiden University |
Hulsbergen-van de Kaa C.A.,Radboud University Nijmegen |
And 3 more authors.
World Journal of Urology | Year: 2016
Purpose: For decades, small renal cancers are treated by radical nephrectomy (RN). Current guidelines recommend partial nephrectomy (PN) to preserve renal function and minimize cardiovascular comorbidity. As adherence to guidelines is largely unknown and international comparison to evaluate quality of health care is lacking, an pre-specified guideline evaluation of quality indicators concerning management of cT1 renal cancers was performed. Methods: We performed a cohort study including patients with cT1 renal cancer between 2010 and 2014, identified through the Netherlands Cancer Registry. Time trends and variation in treatment were described. Factors associated with PN in cT1a and laparoscopic RN in cT1b were evaluated with logistic regression analyses. Results: An increase in nephron-sparing treatment strategies (NSS) of cT1a patients (Ntotal = 2436) was observed; in 2014, 67 % underwent NSS (62 % PN and 5 % thermal ablation). Age, a non-central tumor localization and being treated in a high-volume hospital were associated with PN. Although NSS were applied more frequently over time, the majority (70 %) of cT1b patients (Ntotal = 2205) underwent RN in 2014, mainly performed laparoscopically. Increasing tumor size, tumor localization in the right kidney and being treated in a university hospital were associated with a lower probability of a laparoscopic RN versus open. Treatment in a high-volume hospital was associated with a higher probability of laparoscopic RN. Conclusions: Dutch patients with cT1 renal cancer are predominantly treated according to current guidelines. Data of this pre-specified quality indicator analysis of a urological national guideline may serve as a model for international comparison of treatment of cT1 renal cancers. © 2016, The Author(s).
Zanders M.M.J.,Netherlands Comprehensive Cancer Organisation |
Haak H.R.,Maxima Medical Center |
Haak H.R.,Maastricht University |
van Herk-Sukel M.P.P.,PHARMO Institute for Drug Outcomes Research |
And 3 more authors.
Diabetologia | Year: 2015
Aims/hypothesis: Adherence to glucose-lowering drug (GLD) treatment regimens is crucial for metabolic control and improving prognosis. Because a diagnosis of cancer might have an impact on adherence to medication, this study explored changes in adherence to GLDs following a cancer diagnosis. Methods: All new users of GLDs between 1998 and 2011 who lived in the Eindhoven Cancer Registry–PHARMO Database Network catchment area were selected. Those with a primary cancer diagnosis during follow-up were considered cases and matched with eligible controls without cancer during follow-up. Medication possession ratio (MPR) was used as indicator for medication adherence. Segmented linear auto-regression analysis with interrupted time series was used to assess changes in MPR for cases compared with controls (i.e. overall trend) due to (any) cancer diagnosis and specific cancer types. Results: From the 52,228 GLD users selected, 3,281 cases with cancer and 12,891 controls without cancer during follow-up were included in the study. In our analyses, before cancer diagnosis the MPR increased by 0.10% per month (95% CI 0.10, 0.10). Besides a significant drop in MPR at the time of cancer diagnosis of −6.3% (95% CI −6.5, −6.0), there was an ongoing, yet lower, monthly decline in MPR (−0.20%; 95% CI −0.21, −0.20) after cancer diagnosis. The largest drops in MPR at the time of cancer diagnosis, in the range of 11–15%, were seen among patients with stage IV disease and gastrointestinal or pulmonary cancers. Conclusions/interpretation: Our findings indicate a clear decline in adherence to GLD treatment regimens following a cancer diagnosis. The reason for the decline in MPR needs to be further elucidated. © 2015, Springer-Verlag Berlin Heidelberg.
PubMed | Leiden University, Maastricht University, Netherlands Cancer Institute, Radboud University Nijmegen and Netherlands Comprehensive Cancer Organisation
Type: Journal Article | Journal: World journal of urology | Year: 2016
For decades, small renal cancers are treated by radical nephrectomy (RN). Current guidelines recommend partial nephrectomy (PN) to preserve renal function and minimize cardiovascular comorbidity. As adherence to guidelines is largely unknown and international comparison to evaluate quality of health care is lacking, an pre-specified guideline evaluation of quality indicators concerning management of cT1 renal cancers was performed.We performed a cohort study including patients with cT1 renal cancer between 2010 and 2014, identified through the Netherlands Cancer Registry. Time trends and variation in treatment were described. Factors associated with PN in cT1a and laparoscopic RN in cT1b were evaluated with logistic regression analyses.An increase in nephron-sparing treatment strategies (NSS) of cT1a patients (N total=2436) was observed; in 2014, 67% underwent NSS (62% PN and 5% thermal ablation). Age, a non-central tumor localization and being treated in a high-volume hospital were associated with PN. Although NSS were applied more frequently over time, the majority (70%) of cT1b patients (N total=2205) underwent RN in 2014, mainly performed laparoscopically. Increasing tumor size, tumor localization in the right kidney and being treated in a university hospital were associated with a lower probability of a laparoscopic RN versus open. Treatment in a high-volume hospital was associated with a higher probability of laparoscopic RN.Dutch patients with cT1 renal cancer are predominantly treated according to current guidelines. Data of this pre-specified quality indicator analysis of a urological national guideline may serve as a model for international comparison of treatment of cT1 renal cancers.
Horevoorts N.J.E.,University of Tilburg |
Vissers P.A.J.,Netherlands Comprehensive Cancer Organisation |
Mols F.,University of Tilburg |
Melissa S.Y.T.,Netherlands Comprehensive Cancer Organisation |
Van De Poll-Franse L.V.,University of Tilburg
Journal of Medical Internet Research | Year: 2015
Background: Improving questionnaire response rates is an everlasting issue for research. Today, the Internet can easily be used to collect data quickly. However, collecting data on the Internet can lead to biased samples because not everyone is able to access or use the Internet. The older population, for example, is much less likely to use the Internet. The Patient-Reported Outcomes Following Initial Treatment and Long-Term Evaluation of Survivorship (PROFILES) registry offers a platform to collect Web-based and paper questionnaires and to try different measures to improve response rates. Objective: In this study, our aim was to study the influence of two methods of invitation on the response rate. Our second aim was to examine the preference of questionnaire mode of administration (paper or Web-based) for the older patient in particular. Methods: To test these two invitational methods, 3406 colorectal cancer patients between ages 18 and 85 years received an invitation containing an access code for the Web-based questionnaire. They could also request a paper questionnaire with an included reply card (paper-optional group). In contrast, 179 randomly selected colorectal cancer patients received a paper questionnaire with the invitation (paper-included group). They could also choose to fill out the Web-based questionnaire with the included access code. Results: Response rates did not differ between the paper-optional and the paper-included groups (73.14%, 2491/3406 and 74.9%, 134/179, P=.57). In the paper-optional group, online response was significantly higher when compared to the paper-included group (41.23%, 1027/2491 vs 12.7%, 17/134, P<.001). The majority of online respondents responded after the first invitation (95.33%, 979/1027), which was significantly higher than the paper respondents (52.19%, 764/1464, P<.001). Respondents aged 70 years and older chose to fill out a paper questionnaire more often (71.0%, 677/954). In the oldest age group (>80 years), 18.2% (61/336) of the respondents filled out a Web-based questionnaire. Conclusions: The lack of difference in response rates between invitation modes implies that researchers can leave out a paper questionnaire at invitation without lowering response rates. It may be preferable not to include a paper questionnaire because more respondents then will fill out a Web-based questionnaire, which will lead to faster available data. However, due to respondent preference, it is not likely that paper questionnaires can be left out completely in the near future.
Rombouts A.J.M.,Radboud University Nijmegen |
Hugen N.,Radboud University Nijmegen |
Elferink M.A.G.,Netherlands Comprehensive Cancer Organisation |
Nagtegaal I.D.,Radboud University Nijmegen |
de Wilt J.H.W.,Radboud University Nijmegen
Annals of Surgical Oncology | Year: 2016
Background: Neoadjuvant chemoradiation therapy (CRT) has been widely implemented in the treatment of rectal cancer patients, but optimal timing of surgery after neoadjuvant therapy is unclear. The purpose of this study was to evaluate the effects of prolonged intervals between long-course CRT and surgery in rectal cancer patients. Methods: Data on all rectal cancer patients diagnosed between 2006 and 2011 were retrieved from the population-based Netherlands Cancer Registry; the main outcome parameters were pathologic complete response (pCR) and overall survival (OS). Outcomes were reported separately for patients with early tumors (ETs; N = 217) and locally advanced rectal cancer (LARC; N = 1073). Patients were divided into 2-week interval groups according to treatment interval, ranging from 5–6 to 13–14 weeks. Kaplan–Meier curves, and logistic regression and Cox regression models were used for data analysis. Results: No significant difference in pCR rate was observed for ET patients according to treatment interval. Compared with a treatment interval of 7–8 weeks, pCR rates in LARC patients were higher after 9–10 weeks (18.4 %; odds ratio [OR] 1.56, 95 % CI 1.03–2.37) and 11–12 weeks of treatment interval (20.8 %; OR 1.94, 95 % CI 1.15–3.26). Treatment interval did not influence OS in ET or LARC patients. Conclusions: Treatment intervals of 9–12 weeks between surgery and CRT seem to improve the chances of pCR in LARC patients, without an effect on OS. The length of treatment interval did not affect outcomes in patients with ET. The ongoing search for minimally invasive surgery drives the need for exploration of factors that improve pathologic response. © 2016 The Author(s)
van der Heiden-Van der Loo M.,Netherlands Comprehensive Cancer Organisation |
Siesling S.,Netherlands Comprehensive Cancer Organisation |
Siesling S.,University of Twente |
Wouters M.W.J.M.,Netherlands Cancer Institute |
And 3 more authors.
Annals of Surgical Oncology | Year: 2015
Purpose: All Dutch hospitals are obliged to report their 5-year ipsilateral breast tumor recurrence (IBTR) rate after breast cancer surgery. Experts decided that these rates should not exceed 5 %. This study determined the value of IBTR as an indicator to compare quality of care between hospitals. Methods: All patients with breast cancer (pT1–3, any N, M0) who underwent surgery in 1 of 92 Dutch hospitals from 2003 to 2006 were identified in the Netherlands Cancer Registry. Data of recurrence was retrieved from hospital records. Five-year IBTR rates for breast-conserving surgery (BCS) and mastectomy were calculated by using the Kaplan–Meier method. Hospital variation was presented in funnel plots. Multivariate analysis was used to assess hospital characteristics associated with IBTR rates. Results: A total of 40,892 breast cancer patients were included. The overall 5-year IBTR rate was 2.85 % (95 % confidence interval 2.68–3.03) and was significantly lower for BCS than for mastectomy (2.38 vs. 3.45 %, p < 0.001). IBTR rates decreased over time in both groups. Rates varied between 0.77 and 5.70 % between hospitals. When random variation is taken into account, only extremely high IBTR rates can be detected as deviant from the target value of 5 %. Adjusting for tumor and patient characteristics, analyses showed that a higher volume of mastectomies is associated with lower IBTR rates. Conclusions: Our population-based findings show that IBTR rates in the Netherlands are low and have improved over time. The 5-year IBTR rate as an indicator for quality of care of individual hospitals is of limited value. © 2015, Society of Surgical Oncology.