Chahin Achtari

Chahin Achtari


Research Focus & Metrics

Academic Career Length

22Years (2005-Present)

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

Representative Publications

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1 August 2019 in Gynecologic Oncology
Verified
Journal Article
Open access
Basile PacheBasile Pache
Basile Pache
Gaëtan-Romain JoliatGaëtan-Romain Joliat
Gaëtan-Romain Joliat
Martin HubnerMartin Hubner
Martin Hubner
FGFabian Grass
Fabian Grass
NDNicolas Demartines
Nicolas Demartines
CAChahin Achtari
Chahin Achtari
Enhanced recovery after surgery (ERAS) programs has shown clinical benefits in gynecologic surgery. The aim of the present study was to compare costs before and after implementation of an ERAS program for gynecologic surgery. Retrospective study comparing perioperative costs between consecutive patient groups undergoing gynecologic surgery (benign, staging or debulking) (I, 2012-13) prior, (II) immediately after, and (III, 2014-16) the three years after ERAS implementation. Preoperative, intraoperative, and postoperative real costs were collected for each patient via hospital administration. A bootstrap independent t-test was used for comparison. Demographics and preoperative characteristics were similar between group I (n = 42), II (n = 51), and III (ERAS I; n = 122, II; n = 134, III; n = 90). Average ERAS-specific costs were $687 per patient. Total mean individual costs per patient were $13'329 (95% confidence interval (CI): 11'301-15'213) and $17'710 (95% CI: 14'452-21'605) in the ERAS and pre-ERAS groups respectively, resulting in net savings of $4'381 (95% CI: 549-8'752, p = 0.043) in favour of ERAS group. Cost savings were explained by lower pre- and postoperative costs (difference: $5'011 95% CI: 1'587-8'998, p = 0.019). Total costs continued to decrease by $2'520 (mean: $15'190, 95% CI: 13'791-16'631) in year 1, by $3'077 (mean: $14'633, 95% CI: 13'378-16'250) and $5'070 (mean: $12'640, 95% CI: 11'460-14'015) (p = 0.03) respectively, in year 2 and 3 after implementation. Based on real costs and including specific costs due to ERAS implementation, ERAS program in gynecologic surgery induced significant decrease of overall costs by $4'381 per patient. Total costs continued to decrease in the three years after implementation.

22 April 2011 in International Urogynecology Journal
Verified
Journal Article
Closed access
PDF file
DBDavid Baud
David Baud
SMSylvain Meyer
Sylvain Meyer
YVYvan Vial
Yvan Vial
PHPatrick Hohlfeld
Patrick Hohlfeld
CAChahin Achtari
Chahin Achtari

22 December 2017 in BMC Infectious Diseases
Verified
Journal Article
Open access
PDF file
MJMartine Jacot-Guillarmod
Martine Jacot-Guillarmod
JPJérôme Pasquier
Jérôme Pasquier
Gilbert GREUBGilbert GREUB
Gilbert GREUB
MBMassimo Bongiovanni
Massimo Bongiovanni
CAChahin Achtari
Chahin Achtari
RSRoland Sahli
Roland Sahli
Gardasil®, a quadrivalent vaccine targeting low-risk (6, 11) and high-risk (16, 18) human papillomaviruses (HPV), has been offered to 11–14 year-old schoolgirls in Switzerland since 2008. To evaluate its success and its potential impact on cervical cancer screening, HPV genotypes were examined in 18-year-old girls five years later (sub-study 1) and in outpatients participating to cervical cancer screening before and after vaccine implementation (sub-study 2). For sub-study 1, 3726 females aged 18 in 2013 were invited to fill a questionnaire on personal demographics and HPV risk factors and to provide a self-collected cervicovaginal sample for HPV genotyping and Chlamydia trachomatis PCR. Personal data were evaluated by univariable and multivariable statistics. In sub-study 2, the proportion of the vaccine-type HPV among anogenital HPV was examined with archived genotyping data of 8039 outpatients participating to cervical cancer screening from 1999 till 2015. The yearly evolution of this proportion was evaluated by segmented logistic regression. 690 (18.5%) women participated to sub-study 1 and 327 (8.8%) provided a self-collected sample. Prevalence of Chlamydia trachomatis (4.6%) and demographics confirmed that the subjects were representative of sexually-active Swiss young women. Vaccine (five-year coverage: 77.5%) was preferentially accepted by contraceptive-pill users (P = 0.001) and samples were mainly provided by sexually-active subjects (P < 0.001). The proportion (4%) of the vaccine-type HPV in this population was lower than in sub-study 2 outpatients (n = 849, <26 years old) in the pre-vaccine era (25.7%). The proportion of the high-risk vaccine-type HPV decreased significantly (59%, P = 0.0048) in the outpatients during the post-vaccine era, yet this decrease was restricted to those aged less than 26 years (n = 673, P < 0.0001). The low proportion of vaccine-type HPV in 18-year-old females and its rapid decrease in young women participating to cervical cancer screening extend the success of HPV vaccination to Switzerland. Our data suggest that cervical cancer screening is now entering a stage of reduced proportion of HPV16 and/or 18 in samples reported positive by cytology. In view of the high likelihood of reduced clinical specificity of cytology, primary screening modalities involving HPV testing and cytology should now be re-evaluated in Switzerland.

31 January 2023 in Cancers
Verified
Journal Article
Open access
PDF file
LWLaureline Wetterwald
Laureline Wetterwald
ASAPOSTOLOS SARIVALASIS
APOSTOLOS SARIVALASIS
ALAikaterini Liapi
Aikaterini Liapi
PMPatrice Mathevet
Patrice Mathevet
CAChahin Achtari
Chahin Achtari
Borderline ovarian tumors (BOTs) account for 10–20% of epithelial ovarian neoplasms. They are characterized by their lack of destructive stromal invasion. In comparison to invasive ovarian cancers, BOTs occur in younger patients and have better outcome. Serous borderline ovarian tumor (SBOT) represents the most common subtype of BOT. Complete surgical staging is the current standard management but fertility-sparing surgery is an option for SBOT patients who are at reproductive age. While most cases of SBOTs have an indolent course with favorable prognosis, late recurrence and malignant transformation can occur, usually in the form of low-grade serous carcinoma (LGSC). Thus, assessment of the recurrence risk is essential for the management of those patients. SBOTs can be associated with lymph node involvement (LNI) in up to 30% of patients who undergo lymph node dissection at diagnosis, and whether LNI affects prognosis is controversial. The present review suggests that recurrent SBOTs with LNI have poorer oncological outcomes and highlights the biases due to the scarcity of reports in the literature. Preventing SBOTs from recurring and becoming invasive overtime and a more profound understanding of the underlying mechanisms at play are necessary.

6 July 2018 in International Urogynecology Journal
Verified
Journal Article
Closed access
PDF file
AVAshley Vasseur
Ashley Vasseur
KLKarine Lepigeon
Karine Lepigeon
DBDavid Baud
David Baud
AHAntje Horsch
Antje Horsch
SMSylvain Meyer
Sylvain Meyer
CAChahin Achtari
Chahin Achtari

22 October 2008
Verified
Journal Article
Closed access
MRMarie-Claude Rossier
Marie-Claude Rossier
VBVirginie Bays
Virginie Bays
YVYvan Vial
Yvan Vial
CAChahin Achtari
Chahin Achtari