Innovative Techniques for 60-GHz On-Chip Antennas on CMOS Substrate

The 60-GHz band has a 7-GHz of bandwidth enabling high data rate wireless communication. Also, it has a short wavelength allowing for passive devices integration into a chip, that is, fully integrated system-on-chip (SOC) is possible. This chapter features the design, implementation, and measurements of 60-GHz on-chip antennas (OCAs) on complementary-metal-oxide-semiconductor (CMOS) technology. OCAs are the primary barrier for the SOC solution due to their limited performance. This degraded performance comes from the low resistivity and the high permittivity of the CMOS substrate. We present here two innovative techniques to improve the CMOS OCAs’ performance. The first method utilizes artificial magnetic conductors to shield the OCA electromagnetically from the CMOS substrate. The second methodology employs the PN-junction properties to create a high resistivity layer. Both approaches target the mitigation of the losses of the CMOS substrate; hence, the radiation performance characteristics of the OCAs are enhanced

Loss-of-function mutations in UDP-Glucose 6-Dehydrogenase cause recessive developmental epileptic encephalopathy

Developmental epileptic encephalopathies are devastating disorders characterized by intractable epileptic seizures and developmental delay. Here, we report an allelic series of germline recessive mutations in UGDH in 36 cases from 25 families presenting with epileptic encephalopathy with developmental delay and hypotonia. UGDH encodes an oxidoreductase that converts UDP-glucose to UDP-glucuronic acid, a key component of specific proteoglycans and glycolipids. Consistent with being loss-of-function alleles, we show using patients’ primary fibroblasts and biochemical assays, that these mutations either impair UGDH stability, oligomerization, or enzymatic activity. In vitro, patient-derived cerebral organoids are smaller with a reduced number of proliferating neuronal progenitors while mutant ugdh zebrafish do not phenocopy the human disease. Our study defines UGDH as a key player for the production of extracellular matrix components that are essential for human brain development. Based on the incidence of variants observed, UGDH mutations are likely to be a frequent cause of recessive epileptic encephalopathy

Global economic burden of unmet surgical need for appendicitis

Background: There is a substantial gap in provision of adequate surgical care in many low-and middle-income countries. This study aimed to identify the economic burden of unmet surgical need for the common condition of appendicitis. Methods: Data on the incidence of appendicitis from 170 countries and two different approaches were used to estimate numbers of patients who do not receive surgery: as a fixed proportion of the total unmet surgical need per country (approach 1); and based on country income status (approach 2). Indirect costs with current levels of access and local quality, and those if quality were at the standards of high-income countries, were estimated. A human capital approach was applied, focusing on the economic burden resulting from premature death and absenteeism. Results: Excess mortality was 4185 per 100 000 cases of appendicitis using approach 1 and 3448 per 100 000 using approach 2. The economic burden of continuing current levels of access and local quality was US $92 492 million using approach 1 and$73 141 million using approach 2. The economic burden of not providing surgical care to the standards of high-income countries was $95 004 million using approach 1 and$75 666 million using approach 2. The largest share of these costs resulted from premature death (97.7 per cent) and lack of access (97.0 per cent) in contrast to lack of quality. Conclusion: For a comparatively non-complex emergency condition such as appendicitis, increasing access to care should be prioritized. Although improving quality of care should not be neglected, increasing provision of care at current standards could reduce societal costs substantially

Laparoscopy in management of appendicitis in high-, middle-, and low-income countries: a multicenter, prospective, cohort study.

BACKGROUND: Appendicitis is the most common abdominal surgical emergency worldwide. Differences between high- and low-income settings in the availability of laparoscopic appendectomy, alternative management choices, and outcomes are poorly described. The aim was to identify variation in surgical management and outcomes of appendicitis within low-, middle-, and high-Human Development Index (HDI) countries worldwide. METHODS: This is a multicenter, international prospective cohort study. Consecutive sampling of patients undergoing emergency appendectomy over 6 months was conducted. Follow-up lasted 30 days. RESULTS: 4546 patients from 52 countries underwent appendectomy (2499 high-, 1540 middle-, and 507 low-HDI groups). Surgical site infection (SSI) rates were higher in low-HDI (OR 2.57, 95% CI 1.33-4.99, p = 0.005) but not middle-HDI countries (OR 1.38, 95% CI 0.76-2.52, p = 0.291), compared with high-HDI countries after adjustment. A laparoscopic approach was common in high-HDI countries (1693/2499, 67.7%), but infrequent in low-HDI (41/507, 8.1%) and middle-HDI (132/1540, 8.6%) groups. After accounting for case-mix, laparoscopy was still associated with fewer overall complications (OR 0.55, 95% CI 0.42-0.71, p < 0.001) and SSIs (OR 0.22, 95% CI 0.14-0.33, p < 0.001). In propensity-score matched groups within low-/middle-HDI countries, laparoscopy was still associated with fewer overall complications (OR 0.23 95% CI 0.11-0.44) and SSI (OR 0.21 95% CI 0.09-0.45). CONCLUSION: A laparoscopic approach is associated with better outcomes and availability appears to differ by country HDI. Despite the profound clinical, operational, and financial barriers to its widespread introduction, laparoscopy could significantly improve outcomes for patients in low-resource environments. TRIAL REGISTRATION: NCT02179112

Mortality of emergency abdominal surgery in high-, middle- and low-income countries

Background: Surgical mortality data are collected routinely in high-income countries, yet virtually no low- or middle-income countries have outcome surveillance in place. The aim was prospectively to collect worldwide mortality data following emergency abdominal surgery, comparing findings across countries with a low, middle or high Human Development Index (HDI). Methods: This was a prospective, multicentre, cohort study. Self-selected hospitals performing emergency surgery submitted prespecified data for consecutive patients from at least one 2-week interval during July to December 2014. Postoperative mortality was analysed by hierarchical multivariable logistic regression. Results: Data were obtained for 10 745 patients from 357 centres in 58 countries; 6538 were from high-, 2889 from middle- and 1318 from low-HDI settings. The overall mortality rate was 1⋅6 per cent at 24 h (high 1⋅1 per cent, middle 1⋅9 per cent, low 3⋅4 per cent; P < 0⋅001), increasing to 5⋅4 per cent by 30 days (high 4⋅5 per cent, middle 6⋅0 per cent, low 8⋅6 per cent; P < 0⋅001). Of the 578 patients who died, 404 (69⋅9 per cent) did so between 24 h and 30 days following surgery (high 74⋅2 per cent, middle 68⋅8 per cent, low 60⋅5 per cent). After adjustment, 30-day mortality remained higher in middle-income (odds ratio (OR) 2⋅78, 95 per cent c.i. 1⋅84 to 4⋅20) and low-income (OR 2⋅97, 1⋅84 to 4⋅81) countries. Surgical safety checklist use was less frequent in low- and middle-income countries, but when used was associated with reduced mortality at 30 days. Conclusion: Mortality is three times higher in low- compared with high-HDI countries even when adjusted for prognostic factors. Patient safety factors may have an important role. Registration number: NCT02179112 (http://www.clinicaltrials.gov)

Global variation in anastomosis and end colostomy formation following left-sided colorectal resection

Background End colostomy rates following colorectal resection vary across institutions in high-income settings, being influenced by patient, disease, surgeon and system factors. This study aimed to assess global variation in end colostomy rates after left-sided colorectal resection. Methods This study comprised an analysis of GlobalSurg-1 and -2 international, prospective, observational cohort studies (2014, 2016), including consecutive adult patients undergoing elective or emergency left-sided colorectal resection within discrete 2-week windows. Countries were grouped into high-, middle- and low-income tertiles according to the United Nations Human Development Index (HDI). Factors associated with colostomy formation versus primary anastomosis were explored using a multilevel, multivariable logistic regression model. Results In total, 1635 patients from 242 hospitals in 57 countries undergoing left-sided colorectal resection were included: 113 (6·9 per cent) from low-HDI, 254 (15·5 per cent) from middle-HDI and 1268 (77·6 per cent) from high-HDI countries. There was a higher proportion of patients with perforated disease (57·5, 40·9 and 35·4 per cent; P < 0·001) and subsequent use of end colostomy (52·2, 24·8 and 18·9 per cent; P < 0·001) in low- compared with middle- and high-HDI settings. The association with colostomy use in low-HDI settings persisted (odds ratio (OR) 3·20, 95 per cent c.i. 1·35 to 7·57; P = 0·008) after risk adjustment for malignant disease (OR 2·34, 1·65 to 3·32; P < 0·001), emergency surgery (OR 4·08, 2·73 to 6·10; P < 0·001), time to operation at least 48 h (OR 1·99, 1·28 to 3·09; P = 0·002) and disease perforation (OR 4·00, 2·81 to 5·69; P < 0·001). Conclusion Global differences existed in the proportion of patients receiving end stomas after left-sided colorectal resection based on income, which went beyond case mix alone

Global multi-stakeholder endorsement of the MAFLD definition

none1055noneMendez-Sanchez N.; Bugianesi E.; Gish R.G.; Lammert F.; Tilg H.; Nguyen M.H.; Sarin S.K.; Fabrellas N.; Zelber-Sagi S.; Fan J.-G.; Shiha G.; Targher G.; Zheng M.-H.; Chan W.-K.; Vinker S.; Kawaguchi T.; Castera L.; Yilmaz Y.; Korenjak M.; Spearman C.W.; Ungan M.; Palmer M.; El-Shabrawi M.; Gruss H.-J.; Dufour J.-F.; Dhawan A.; Wedemeyer H.; George J.; Valenti L.; Fouad Y.; Romero-Gomez M.; Eslam M.; Abate M.L.; Abbas B.; Abbassy A.A.; Abd El Ghany W.; Abd Elkhalek A.; Abd ElMajeed E.; Abdalgaber M.; AbdAllah M.; Abdallah M.; Abdallah N.; Abdelaleem S.; Abdelghani Y.; Abdelghany W.; Abdelhalim S.M.; Abdelhamid W.; Abdelhamid N.; Abdelkader N.A.; Abdelkreem E.; Abdelmohsen A.M.; Abdelrahman A.A.; Abd-elsalam S.M.; Abdeltawab D.; Abduh A.; Abdulhakam N.; Abdulla M.; Abedpoor N.; Abenavoli L.; Aberg F.; Ablack O.; Abo elftouh M.; Abo-Amer Y.E.-E.; Aboubkr A.; Aboud A.; Abouelnaga A.M.; Aboufarrag G.A.; Aboutaleb A.; Abundis L.; Adali G.; Adames E.; Adams L.; Adda D.; Adel N.; Adel N.; Adel Sayed M.; Afaa T.J.; Afredj N.; Aghayeva G.; Aghemo A.; Aguilar-Salinas C.A.; Ahlenstiel G.; Ahmady W.; Ahmed W.; Ahmed A.; Ahmed S.N.; Ahmed H.M.; Ahmed R.; Aigner E.; Akarsu M.; Akroush M.; Akyuz U.; Al Mahtab M.; Al Qadiri T.; Al Rawahi Y.; AL rubaee R.; Al Saffar M.; Alam S.; Al-Ani Z.; Albillos A.; Alboraie M.; Al-Busafi S.; Al-Emam M.; Alharthi J.; Ali K.; Ali B.A.; Ali M.; Ali R.A.R.; Alisi A.; AL-Khafaji A.R.; Alkhatry M.; Aller R.; Almansoury Y.; Al-Naamani K.; Alnakeeb A.; Alonso A.; Alqahtani S.A.; Alrabadi L.; Alswat K.; Altaher M.; Altamimi T.; Altamirano J.; Alvares-da-Silva M.R.; Aly E.A.M.; Alzahaby A.; Alzamzamy A.; Amano K.; Amer M.A.; Amin M.A.; Amin S.A.; Amir A.A.; Ampuero J.; Anas N.; Andreone P.; Andriamandimby S.F.; Anees M.; Angela P.; Antonios M.; Arafat W.; Araya J.M.; Armendariz-Borunda J.; Armstrong M.J.; Ashktorab H.; Aspichueta P.; Assal F.; Atef M.; Attia D.; Atwa H.; Awad R.; Awad M.A.E.; Awny S.; Awolowo O.; Awuku Y.A.; Ayada I.; Aye T.T.; Ayman S.; Ayman H.; Ayoub H.; Azmy H.M.; Babaran R.P.; Badreldin O.; Badry A.; Bahcecioglu I.H.; Bahour A.; Bai J.; Balaban Y.; Balasubramanyam M.; Bamakhrama K.; Banales J.M.; Bangaru B.; Bao J.; Barahona J.S.; Barakat S.; Barbalho S.M.; Barbra B.; Barranco B.; Barrera F.; Baumann U.; Bazeed S.; Bech E.; Benayad A.; Benesic A.; Bernstein D.; Bessone F.; Birney S.; Bisseye C.; Blake M.; Bobat B.; Bonfrate L.; Bordin D.S.; Bosques-Padilla F.; Boursier J.; Boushab B.M.; Bowen D.; Bravo P.M.; Brennan P.N.; Bright B.; Broekaert I.; Buque X.; Burgos-Santamaria D.; Burman J.; Busetto L.; Byrne C.D.; Cabral-Prodigalidad P.A.I.; Cabrera-Alvarez G.; Cai W.; Cainelli F.; Caliskan A.R.; Canbay A.; Cano-Contreras A.; Cao H.-X.; Cao Z.; Carrion A.; Carubbi F.; Casanovas T.; Castellanos Fernandez M.I.; Chai J.; Chan S.P.; Charatcharoenwitthaya P.; Chavez-Tapia N.; Chayama K.; Chen J.; Chen L.; Chen Z.-W.; Chen H.; Chen S.-D.; Chen Q.; Chen Y.; Chen G.; Chen E.-Q.; Chen F.; Chen P.-J.; Cheng R.; Cheng W.; Chieh J.T.W.; Chokr I.; Cholongitas E.; Choudhury A.; Chowdhury A.; Chukwudike E.S.; Ciardullo S.; Clayton M.; Clement K.; Cloa M.M.; Coccia C.; Collazos C.; Colombo M.; Cosar A.M.; Cotrim H.P.; Couillerot J.; Coulibaly A.; Crespo G.; Crespo J.; Cruells M.; Cua I.H.Y.; Dabbous H.K.; Dalekos G.N.; D'Alia P.; Dan L.; Dao V.H.; Darwish M.; Datz C.; Davalos-Moscol M.B.; Dawoud H.; de Careaga B.O.; de Knegt R.; de Ledinghen V.; de Silva J.; Debzi N.; Decraecker M.; Del Pozo E.; Delgado T.C.; Delgado-Blanco M.; Dembinski L.; Depina A.; Derbala M.; Desalegn H.; Desbois-Mouthon C.; Desoky M.; Dev A.; Di Ciaula A.; Diago M.; Diallo I.; Diaz L.A.; Dirchwolf M.; Dongiovanni P.; Dorofeyev A.; Dou X.; Douglas M.W.; Doulberis M.; Dovia C.K.; Doyle A.; Dragojevic I.; Drenth J.P.; Duan X.; Dulskas A.; Dumitrascu D.L.; Duncan O.; Dusabejambo V.; Dwawhi R.S.N.A.; Eiketsu S.; El Amrousy D.; El Deeb A.; El Deriny G.; El Din H.S.; El Kamshishy S.; El Kassas M.; El Raziky M.; Elagamy O.A.; Elakel W.; Elalfy D.; Elaraby H.; ElAwady H.; Elbadawy R.; Eldash H.H.; Eldefrawy M.S.; Elecharri C.L.; Elfaramawy A.; Elfatih M.; Elfiky M.; Elgamsy M.; Elgendy M.; El-Guindi M.A.; Elhussieny N.; Eliwa A.M.; Elkabbany Z.; El-Khayat H.; El-Koofy N.M.; Elmetwalli A.; Elrabat A.; El-Raey F.; Elrashdy F.; Elsahhar M.; Elsaid E.M.; Elsayed S.; Elsayed H.; Elsayed A.; Elsayed A.M.; Elsayed H.; El-Serafy M.; Elsharkawy A.M.; Elsheemy R.Y.; Elshemy E.E.; Elsherbini S.; Eltoukhy N.; Elwakil R.; Emad O.; Emad S.; Embabi M.; Ergenc I.; Ermolova T.; Esmat G.; Esmat D.M.; Estupinan E.C.; Ettair S.; Eugen T.; Ezz-Eldin M.; Falcon L.P.V.; Fan Y.-C.; Fandari S.; Farag M.; Farahat T.M.; Fares E.M.; Fares M.; Fassio E.; Fathy H.; Fathy D.; Fathy W.; Fayed S.; Feng D.; Feng G.; Fernandez-Bermejo M.; Ferreira C.T.; Ferrer J.D.; Forbes A.; Fouad R.; Fouad H.M.; Frisch T.; Fujii H.; Fukunaga S.; Fukunishi S.; Fulya H.; Furuhashi M.; Gaber Y.; Galang A.J.G.; Gallardo J.C.; Galloso R.; Gamal M.; Gamal R.; Gamal H.; Gan J.; Ganbold A.; Gao X.; Garas G.; Garba T.; Garcia-Cortes M.; Garcia-Monzon C.; Garcia-Samaniego J.; Gastaldelli A.; Gatica M.; Gatley E.; Gegeshidze T.; Geng B.; Ghazinyan H.; Ghoneem S.; Giacomelli L.; Giannelli G.; Giannini E.G.; Giefer M.; Gines P.; Girala M.; Giraudi P.J.; Goh G.B.-B.; Gomaa A.A.; Gong B.; Gonzales D.H.C.; Gonzalez H.C.; Gonzalez-Huezo M.S.; Graupera I.; Grgurevic I.; Gronbaek H.; Gu X.; Guan L.; Gueye I.; Guingane A.N.; Gul O.O.; Gul C.B.; Guo Q.; Gupta P.P.; Gurakar A.; Gutierrez J.C.R.; Habib G.; Hafez A.; Hagman E.; Halawa E.; Hamdy O.; Hamed A.E.; Hamed D.H.; Hamid S.; Hamoudi W.; Han Y.; Haridy J.; Haridy H.; Harris D.C.H.H.; Hart M.; Hasan F.; Hashim A.; Hassan I.; Hassan A.; Hassan E.A.; Hassan A.A.; Hassan M.S.; Hassanin F.; Hassnine A.; Haukeland J.W.; Hawal A.I.M.; He J.; He Q.; He Y.; He F.-P.; Hegazy M.; Hegazy A.; Henegil O.; Hernandez N.; Hernandez-Guerra M.; Higuera-de-la-Tijera F.; Hindy I.; Hirota K.; Ho L.C.; Hodge A.; Hosny M.; Hou X.; Huang J.-F.; Huang Y.; Huang Z.; Huang Y.; Huang A.; Huang X.-P.; Hui-ping S.; Hunyady B.; Hussein M.A.; Hussein O.; Hussien S.M.; Ibanez-Samaniego L.; Ibdah J.; Ibrahim L.; Ibrahim M.; Ibrahim I.; Icaza-Chavez M.E.; Idelbi S.; Idilman R.I.; Ikeda M.; Indolfi G.; Invernizzi F.; Irshad I.; Isa H.M.A.; Iskandar N.J.; Ismaiel A.; Ismail M.; Ismail Z.; Ismail F.; Iwamoto H.; Jack K.; Jacob R.; Jafarov F.; Jafri W.; Jahshan H.; Jalal P.K.; Jancoriene L.; Janicko M.; Jayasena H.; Jefferies M.; Jha V.; Ji F.; Ji Y.; Jia J.; Jiang C.; Jiang N.; Jiang Z.-Z.; Jin X.; Jin Y.; Jing X.; Jingyu Q.; Jinjolava M.; Jong F.H.H.; Jucov A.; Julius I.; Kaddah M.; Kamada Y.; kamal A.; Kamal E.M.; Kamel A.S.; Kao J.-H.; Karin M.; Karlas T.; Kashwaa M.; Katsidzira L.; Kaya E.; Kayasseh M.A.; Keenan B.; Keklikkiran C.; Keml W.; Khalaf D.K.; Khalefa R.; Khamis S.; Khater D.; khattab H.; Khavkin A.; Khlynova O.; Khmis N.; Kobyliak N.; Koffas A.; Koike K.; Kok K.Y.Y.; Koller T.; Komas N.P.; Korochanskaya N.V.; Koulla Y.; Koya S.; Kraft C.; Kraja B.; Krawczyk M.; Kuchay M.S.; Kulkarni A.V.; Kumar A.; Kumar M.; Lakoh S.; Lam P.; Lan L.; Lange N.F.; Lankarani K.B.; Lanthier N.; Lapshyna K.; Lashen S.A.; Laure K.N.J.; Lazebnik L.; Lebrec D.; Lee S.S.; Lee W.S.; Lee Y.Y.; Leeming D.J.; Leite N.C.; Leon R.; Lesmana C.R.A.; Li J.; Li Q.; Li J.; Li Y.-Y.; Li Y.; Li L.; Li M.; li Y.; Liang H.; Lijuan T.; Lim S.G.; Lim L.-L.; Lin S.; Lin H.-C.; Lin R.; Lithy R.; Liu Y.; Liu Y.; Liu X.; Liu W.-Y.; Liu S.; Liu K.; Liu T.; Lonardo A.; Lopez M.B.; Lopez-Benages E.; Lopez-Jaramillo P.; Lu H.; Lu L.G.; Lu Y.; Lubel J.; Lui R.; Lupasco I.; Luzina E.; Lv X.-H.; Lynch K.; Ma H.-L.; Machado M.V.; Maduka N.; Madzharova K.; Magdaong R.; Mahadeva S.; Mahfouz A.; Mahmood N.R.K.N.; Mahmoud E.; Mahrous M.; Maiwall R.; Majeed A.; Majumdar A.; Mak L.; Maklouf M.M.; Malekzadeh R.; Mandato C.; Mangia A.; Mann J.; Mansour H.H.; Mansouri A.; Mantovani A.; Mao J.Q.; Maramag F.; Marchesini G.; Marcus C.; Marinho R.A.R.T.; Martinez-Chantar M.L.; Martins A.A.S.; Marwan R.; Mason K.F.; Masoud G.; Massoud M.N.; Matamoros M.A.; Mateos R.M.; Mawed A.; Mbanya J.C.; Mbendi C.; McColaugh L.; McLeod D.; Medina J.F.R.; Megahed A.; Mehrez M.; Memon I.; Merat S.; Mercado R.; Mesbah A.; Meskini T.; Metwally M.; Metwaly R.; Miao L.; Micah E.; Miele L.; Milivojevic V.; Milovanovic T.; Mina Y.L.; Mishkovik M.; Mishriki A.; Mitchell T.; Mohamed A.; Mohamed M.; Mohamed S.; Mohammed S.; Mohammed A.; Mohan V.; Mohie S.; Mokhtar A.; Moniem R.; Montilla M.S.; Morales J.A.O.; Morata M.M.S.; Moreno-Planas J.M.; Morise S.; Mosaad S.; Moselhy M.; Mostafa A.M.; Mostafa E.; Mouane N.; Mousa N.; Moustafa H.M.; Msherif A.; Muller K.; Munoz C.; Munoz-Urribarri A.B.; Murillo O.A.; Mustapha F.I.; Muzurovic E.; Nabil Y.; Nafady S.; Nagamatsu A.; Nakajima A.; Nakano D.; Nan Y.; Nascimbeni F.; Naseef M.S.; Nashat N.; Natalia T.; Negro F.; Nersesov A.V.; Neuman M.; Ng'wanasayi M.; Ni Y.; Nicoll A.; Niizeki T.; Nikolova D.; Ningning W.; Niriella M.; Nogoibaeva K.A.; Nordien R.; O Sullivan C.; O'Beirne J.; Obekpa S.; Ocama P.; Ochwoto M.; Ogolodom M.P.; Ojo O.; Okrostsvaridze N.; Oliveira C.P.; Omana R.C.; Omar O.M.; Omar H.; Omar M.; Omran S.; Omran R.; Osman M.M.; Owise N.; Owusu-Ansah T.; Padilla- Machaca P.M.; Palle S.; Pan Z.; Pan X.-Y.; Pan Q.; Papaefthymiou A.; Paquissi F.C.; Par G.; Parkash A.; Payawal D.; Peltekian K.M.; Peng X.; Peng L.; Peng Y.; Pengoria R.; Perez M.; Perez J.L.; Perez N.M.; Persico M.; Pessoa M.G.; Petta S.; Philip M.; Plaz Torres M.C.; Polavarapu N.; Poniachik J.; Portincasa P.; Pu C.; Purnak T.; Purwanto E.; Qi X.; Qi X.; Qian Z.; Qiang Z.; Qiao Z.; Qiao L.; Queiroz A.; Rabiee A.; Radwan M.; Rahetilahy A.M.; Ramadan Y.; Ramadan D.; Ramli A.S.; Ramm G.A.; Ran A.; Rankovic I.; RAO H.; Raouf S.; Ray S.; Reau N.; Refaat A.; Reiberger T.; Remes-Troche J.M.; Reyes E.C.; Richardson B.; Ridruejo E.; Riestra Jimenez S.; Rizk I.; Roberts S.; Roblero J.P.; Robles J.A.P.; Rockey D.; Rodriguez M.; Rodriguez Hernandez H.; Roman E.; Romeiro F.G.; Romeo S.; Rosales-Zabal J.M.; Roshdi G.R.; Rosso N.; Ruf A.; Ruiz P.C.; Runes N.R.; Ruzzenente A.; Ryan M.; Saad A.; Sabbagh E.B.; Sabbah M.; Saber S.; Sabrey R.; Sabry R.; Saeed M.A.; Said D.; Said E.M.; Sakr M.A.; Salah Y.; Salama R.M.; Salama A.; Saleh H.; Saleh A.; Salem A.; Salem A.T.; Salifou A.; Salih A.F.; Salman A.; Samouda H.; Sanai F.; Sanchez-Avila J.F.; Sanker L.; Sano T.; Sanz M.; Saparbu T.; Sawhney R.; Sayed F.; Sayed S.A.; Sayed A.O.; Sayed M.; Sebastiani G.; Secadas L.; Sediqi K.Q.; Seif S.; Semida N.; Senates E.; Serban E.D.; Serfaty L.; Seto W.-K.; Sghaier I.; Sha M.; Shabaan H.M.; Shalaby L.; Shaltout I.; Sharara A.I.; Sharma V.; Shawa I.T.; Shawkat A.; Shawky N.; Shehata O.; Sheils S.; Shewaye A.B.; Shi G.; Shi J.; Shimose S.; Shirono T.; Shou L.; Shrestha A.; Shui G.; Sievert W.; Sigurdardottir S.; Sira M.M.; Siradj R.; Sison C.; Smyth L.; Soliman R.; Sollano J.D.; Sombie R.; Sonderup M.; Sood S.; Soriano G.; Stedman C.A.M.; Stefanyuk O.; Stimac D.; Strasser S.; Strnad P.; Stuart K.; Su W.; Su M.; Sumida Y.; Sumie S.; Sun D.-Q.; Sun J.; Suzuki H.; Svegliati-Baroni G.; Swar M.O.; TAHARBOUCHT S.; Taher Z.; Takamura S.; Tan L.; Tan S.-S.; Tanwandee T.; Tarek S.; Tatiana G.; Tavaglione F.; Tecson G.Y.; Tee H.-P.; Teschke R.; Tharwat M.; Thong V.D.; Thursz M.; Tine T.; Tiribelli C.; Tolmane I.; Tong J.; Tongo M.; Torkie M.; Torre A.; Torres E.A.; Trajkovska M.; Treeprasertsuk S.; Tsutsumi T.; Tu T.; Tur J.A.; Turan D.; Turcan S.; Turkina S.; Tutar E.; Tzeuton C.; Ugiagbe R.; Uygun A.; Vacca M.; Vajro P.; Van der Poorten D.; Van Kleef L.A.; Vashakidze E.; Velazquez C.M.; Velazquez M.I.; Vento S.; Verhoeven V.; Vespasiani-Gentilucci U.; Vethakkan S.R.; Vilaseca J.; Vitek L.; Volkanovska A.; Wallace M.; Wan W.; Wang Y.; Wang Y.; Wang X.; Wang X.; Wang C.; Wang C.; Wang M.; Wangchuk P.; Weltman M.; White M.; Wiegand J.; Wifi M.-N.; Wigg A.; Wilhelmi M.; William R.; Wittenburg H.; Wu S.; Wubeneh A.M.; Xia H.; Xiao J.; Xiao X.; Xiaofeng W.; Xiong W.; Xu L.; Xu J.; Xu W.; Xu J.-H.; Xu K.; Xu Y.; Xu S.-H.; Xu M.; Xu A.; Xu C.; Yan H.; Yang J.; Yang R.-X.; Yang Y.; Yang Q.; Yang N.; Yao J.; Yara J.; Yaras S.; Yilmaz N.; Younes R.; younes H.; Young S.; Youssef F.; Yu Y.; Yu M.-L.; Yuan J.; Yue Z.; Yuen M.-F.; Yun W.; Yurukova N.; Zakaria S.; Zaky S.; Zaldastanishvili M.; Zapata R.; Zare N.; Zerem E.; Zeriban N.; Zeshuai X.; Zhang H.; Zhang X.; Zhang Y.; Zhang W.-H.; Zhang X.; Zhang Y.-P.; Zhang Y.; Zhang Z.-Q.; Zhao J.; Zhao R.-R.; Zhao H.; Zheng C.; Zheng Y.; Zheng R.; Zheng T.-L.; Zheng K.; Zhou X.Q.; Zhou Y.; Zhou Y.-J.; Zhou H.; Zhou L.; Zhou Y.; Zhu L.D.; Zhu Y.F.; Zhu Y.; Zhu P.-W.; Ziada E.; Ziring D.; Ziyi L.; Zou S.; Zou Z.; Zou H.; Zuart Ruiz R.Mendez-Sanchez, N.; Bugianesi, E.; Gish, R. G.; Lammert, F.; Tilg, H.; Nguyen, M. H.; Sarin, S. K.; Fabrellas, N.; Zelber-Sagi, S.; Fan, J. -G.; Shiha, G.; Targher, G.; Zheng, M. -H.; Chan, W. -K.; Vinker, S.; Kawaguchi, T.; Castera, L.; Yilmaz, Y.; Korenjak, M.; Spearman, C. W.; Ungan, M.; Palmer, M.; El-Shabrawi, M.; Gruss, H. -J.; Dufour, J. -F.; Dhawan, A.; Wedemeyer, H.; George, J.; Valenti, L.; Fouad, Y.; Romero-Gomez, M.; Eslam, M.; Abate, M. L.; Abbas, B.; Abbassy, A. A.; Abd El Ghany, W.; Abd Elkhalek, A.; Abd ElMajeed, E.; Abdalgaber, M.; Abdallah, M.; Abdallah, M.; Abdallah, N.; Abdelaleem, S.; Abdelghani, Y.; Abdelghany, W.; Abdelhalim, S. M.; Abdelhamid, W.; Abdelhamid, N.; Abdelkader, N. A.; Abdelkreem, E.; Abdelmohsen, A. M.; Abdelrahman, A. A.; Abd-elsalam, S. M.; Abdeltawab, D.; Abduh, A.; Abdulhakam, N.; Abdulla, M.; Abedpoor, N.; Abenavoli, L.; Aberg, F.; Ablack, O.; Abo elftouh, M.; Abo-Amer, Y. E. -E.; Aboubkr, A.; Aboud, A.; Abouelnaga, A. M.; Aboufarrag, G. 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M.; Malekzadeh, R.; Mandato, C.; Mangia, A.; Mann, J.; Mansour, H. H.; Mansouri, A.; Mantovani, A.; Mao, J. Q.; Maramag, F.; Marchesini, G.; Marcus, C.; Marinho, R. A. R. T.; Martinez-Chantar, M. L.; Martins, A. A. S.; Marwan, R.; Mason, K. F.; Masoud, G.; Massoud, M. N.; Matamoros, M. A.; Mateos, R. M.; Mawed, A.; Mbanya, J. C.; Mbendi, C.; Mccolaugh, L.; Mcleod, D.; Medina, J. F. R.; Megahed, A.; Mehrez, M.; Memon, I.; Merat, S.; Mercado, R.; Mesbah,

Global variation in anastomosis and end colostomy formation following left-sided colorectal resection

Background: End colostomy rates following colorectal resection vary across institutions in high-income settings, being influenced by patient, disease, surgeon and system factors. This study aimed to assess global variation in end colostomy rates after left-sided colorectal resection. Methods: This study comprised an analysis of GlobalSurg-1 and-2 international, prospective, observational cohort studies (2014, 2016), including consecutive adult patients undergoing elective or emergency left-sided colorectal resection within discrete 2-week windows. Countries were grouped into high-, middle-and low-income tertiles according to the United Nations Human Development Index (HDI). Factors associated with colostomy formation versus primary anastomosis were explored using a multilevel, multivariable logistic regression model. Results: In total, 1635 patients from 242 hospitals in 57 countries undergoing left-sided colorectal resection were included: 113 (6·9 per cent) from low-HDI, 254 (15·5 per cent) from middle-HDI and 1268 (77·6 percent) from high-HDI countries. There was a higher proportion of patients with perforated disease (57·5, 40·9 and 35·4 per cent; P &lt; 0·001) and subsequent use of end colostomy (52·2, 24·8 and 18·9 per cent; P &lt; 0·001) in low-compared with middle-and high-HDI settings. The association with colostomy use in low-HDI settings persisted (odds ratio (OR) 3·20, 95 per cent c.i. 1·35 to 7·57; P = 0·008) after risk adjustment for malignant disease (OR 2·34, 1·65 to 3·32; P &lt; 0·001), emergency surgery (OR 4·08, 2·73 to 6·10; P &lt; 0·001), time to operation at least 48 h (OR 1·99, 1·28 to 3·09; P = 0·002) and disease perforation (OR 4·00, 2·81 to 5·69; P &lt; 0·001). Conclusion: Global differences existed in the proportion of patients receiving end stomas after left-sided colorectal resection based on income, which went beyond case mix alone