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Featured researches published by Claudia B.M. Bijen.


Lancet Oncology | 2010

Safety of laparoscopy versus laparotomy in early-stage endometrial cancer : a randomised trial

Marian J.E. Mourits; Claudia B.M. Bijen; Henriette J.G. Arts; Henk G. ter Brugge; Rob van der Sijde; Lasse Paulsen; Jacobus Wijma; Marlies Y. Bongers; Wendy J. Post; Ate G.J. van der Zee; Geertruida H. de Bock

BACKGROUND The standard surgery for early-stage endometrial cancer is total abdominal hysterectomy (TAH) and bilateral salpingo-oophorectomy, which is associated with substantial morbidity. Total laparoscopic hysterectomy (TLH) and bilateral salpingo-oophorectomy is less invasive and is assumed to be associated with lower morbidity, particularly in obese women. This study investigated the complication rate of TLH versus TAH in women with early-stage endometrial cancer. METHODS This randomised trial was done in 21 hospitals in The Netherlands, and 26 gynaecologists with proven sufficient skills in TLH participated. 283 patients with stage I endometrioid adenocarcinoma or complex atypical hyperplasia were randomly allocated (2:1) to the intervention group (TLH, n=187) or control group (TAH, n=96). Randomisation by sequential number generation was done centrally in alternate blocks of six and three participants, with stratification by trial centre. After assignment, the study coordinators, patients, gynaecologists, and members of the panel were not masked to intervention. The primary outcome was major complication rate, assessed by an independent panel. Data were analysed by a modified intention-to-treat analysis, since two patients in both groups were excluded from the main analysis. This trial is registered with the Dutch trial registry, number NTR821. FINDINGS The proportion of major complications was 14.6% (27 of 185) in the TLH group versus 14.9% (14 of 94) in the TAH group, with a difference of -0.3% (95% CI -9.1 to 8.5; p=0.95). The proportion of patients with an intraoperative major complication (nine of 279 [3.2%]) was lower than the proportion with a postoperative major complication (32 of 279 [11.5%]) and did not differ between TLH (five of 185 [2.7%]) and TAH (four of 94 [4.3%]; p=0.49). The proportion of patients with a minor complication was 13.0% (24 of 185) in the TLH group and 11.7% (11 of 94) in the TAH group (p=0.76). Conversion to laparotomy occurred in 10.8% (20 of 185) of the laparoscopic procedures. TLH was associated with significantly less blood loss (p<0.0001), less use of pain medication (p<0.0001), a shorter hospital stay (p<0.0001), and a faster recovery (p=0.002), but the procedure took longer than TAH (p<0.0001). INTERPRETATION Our results showed no evidence of a benefit for TLH over TAH in terms of major complications, but TLH (done by skilled surgeons) was beneficial in terms of a shorter hospital stay, less pain, and quicker resumption of daily activities. FUNDING The Dutch Organization for Health Research and Development (ZonMw), programme efficacy.


PLOS ONE | 2009

Costs and Effects of Abdominal versus Laparoscopic Hysterectomy: Systematic Review of Controlled Trials

Claudia B.M. Bijen; Karin M. Vermeulen; Marian J.E. Mourits; Geertruida H. de Bock

Objective Comparative evaluation of costs and effects of laparoscopic hysterectomy (LH) and abdominal hysterectomy (AH). Data sources Controlled trials from Cochrane Central register of controlled trials, Medline, Embase and prospective trial registers. Selection of studies Twelve (randomized) controlled studies including the search terms costs, laparoscopy, laparotomy and hysterectomy were identified. Methods The type of cost analysis, perspective of cost analyses and separate cost components were assessed. The direct and indirect costs were extracted from the original studies. For the cost estimation, hospital stay and procedure costs were selected as most important cost drivers. As main outcome the major complication rate was taken. Findings Analysis was performed on 2226 patients, of which 1013 (45.5%) in the LH group and 1213 (54.5%) in the AH group. Five studies scored ≥10 points (out of 19) for methodological quality. The reported total direct costs in the LH group (


BMC Cancer | 2009

Total laparoscopic hysterectomy versus abdominal hysterectomy in the treatment of patients with early stage endometrial cancer: A randomized multi center study

Claudia B.M. Bijen; Justine M. Briët; Geertruida H. de Bock; Henriette J.G. Arts; Johanna A Bergsma-Kadijk; Marian J.E. Mourits

63,997) were 6.1% higher than the AH group (


International Journal of Cancer | 2010

The prognostic role of classical and nonclassical MHC class I expression in endometrial cancer

Claudia B.M. Bijen; E.J. Bantema-Joppe; Renske A. de Jong; Ninke Leffers; Marian J.E. Mourits; Henk F. Eggink; Ate G.J. van der Zee; Harry Hollema; Geertruida H. de Bock; Hans W. Nijman

60,114). The reported total indirect costs of the LH group (


European Journal of Cancer | 2011

Laparoscopic hysterectomy is preferred over laparotomy in early endometrial cancer patients, however not cost effective in the very obese

Claudia B.M. Bijen; Geertruida H. de Bock; Karin M. Vermeulen; Henriette J.G. Arts; Henk G. ter Brugge; Rob van der Sijde; Arjen. A. Kraayenbrink; Marlies Y. Bongers; Ate G.J. van der Zee; Marian J.E. Mourits

1,609) were half of the total indirect in the AH group (


Gynecologic Oncology | 2011

Cost effectiveness of laparoscopy versus laparotomy in early stage endometrial cancer: A randomised trial

Claudia B.M. Bijen; Karin M. Vermeulen; Marian J.E. Mourits; Henriette J.G. Arts; Henk G. ter Brugge; Rob van der Sijde; Jacobus Wijma; Marlies Y. Bongers; Ate G.J. van der Zee; Geertruida H. de Bock

3,139). The estimated mean major complication rate in the LH group (14.3%) was lower than in the AH group (15.9%). The estimated total costs in the LH group were


Gynecologic Oncology | 2009

Role of endocervical curettage in the preoperative staging of endometrial carcinoma

Claudia B.M. Bijen; Geertruida H. de Bock; Klaske A. ten Hoor; Hans W. Nijman; Harry Hollema; Marian J.E. Mourits

3,884 versus


The Lancet | 2009

Lymphadenectomy in endometrial cancer

Marian J.E. Mourits; Claudia B.M. Bijen; de Truuske Bock

3,312 in the AH group. The incremental costs for reducing one patient with major complication(s) in the LH group compared to the AH group was


Gynecologic Oncology | 2009

Total laparoscopic hysterectomy versus abdominal hysterectomy with lymphadenectomy for early-stage endometrial cancer

Claudia B.M. Bijen; de Truuske Bock; Marian J.E. Mourits

35,750. Conclusions The shorter hospital stay in the LH group compensates for the increased procedure costs, with less morbidity. LH points in the direction of cost effectiveness, however further research is warranted with a broader costs perspective including long term effects as societal benefit, quality of life and survival.


The Lancet | 2009

Lymphadenectomy in endometrial cancer (letter)

Marian J.E. Mourits; Claudia B.M. Bijen; de Truuske Bock

BackgroundTraditionally standard treatment for patients with early stage endometrial cancer (EC) is total abdominal hysterectomy and bilateral salpingo oophorectomy (TAH+BSO) with or without lymph node dissection through a vertical midline incision. While TAH is an accepted effective treatment, it is highly invasive, visibly scarring and associated with morbidity. An alternative treatment is the same operation by laparoscopy. Though in several studies total laparoscopic hysterectomy (TLH+ BSO) seems a safe and feasible alternative approach in early stage endometrial cancer patients, there are no randomized data available yet. Furthermore, a randomized controlled trial with surgeons trained in laparoscopy is warranted in order to implement this technique in a safe manner. The aim of this study is to compare the treatment related morbidity, cost-effectiveness and quality of life in early stage endometrial cancer patients treated by laparoscopy versus the standard open approach.MethodsA multi centre randomized clinical phase 3 trial, including 5 university hospitals and 15 regional hospitals in the Netherlands. Only gynecologists trained in performing a TLH are allowed to participate. Inclusion criteria: Patients with a clinical stage I endometrioid adenocarcinoma or complex atypical hyperplasia are randomized in a 2:1 allocation to receive TLH or TAH. The main outcome measure is the rate of major complications, as assessed by an independent clinical review board. In total, 275 patients are required to have 80% power at α-0.05 to detect a significant difference of 15% complication rate. Secondary outcome measures are 1) costs and cost-effectiveness, 2) minor complications, and 3) quality of life. All data from this multi center study are reported using case record forms. Data regarding quality of life, pain, body Image, sexuality and additional homecare are assessed with self reported questionnaires.DiscussionA randomized multi center study in early stage endometrial cancer patients with inclusion criteria for patients and surgeons is designed and ongoing. Results will be presented at the end of 2009.Trial RegistrationDutch trial register number NTR821.

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Marian J.E. Mourits

University Medical Center Groningen

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Geertruida H. de Bock

University Medical Center Groningen

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Ate G.J. van der Zee

University Medical Center Groningen

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Henriette J.G. Arts

University Medical Center Groningen

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Karin M. Vermeulen

University Medical Center Groningen

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Hans W. Nijman

University Medical Center Groningen

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Harry Hollema

University Medical Center Groningen

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E.J. Bantema-Joppe

University Medical Center Groningen

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Johanna A Bergsma-Kadijk

University Medical Center Groningen

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Justine M. Briët

University Medical Center Groningen

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