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The data about active smoking in relation to gastric motility have been inconsistent and specifically the effect of smoking on gastric emptying after PD has not yet been investigated in detail.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>295 patients at our department underwent PD between January 2009 and December 2019. Patients were analyzed in relation to demographic factors, diagnosis, pre-existing conditions, intraoperative characteristics, hospital stay, mortality and postoperative complications with special emphasis on DGE. All complications were classified according to the definitions of the International Study Group on Pancreatic Surgery.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>274 patients were included in the study and analyzed regarding their smoking habits (non or former smokers, n\u2009=\u200988, 32.1% vs. active smokers, n\u2009=\u2009186, 68.6%). Excluded were patients for whom no information about their smoking habits was available (n\u2009=\u20093), patients who had had gastric resection before (n\u2009=\u20094) and patients with prolonged postoperative resumption to normal diet independently from DGE (long-term ventilation\u2009&gt;\u20097\u00a0days, fasting due to pancreatic fistula) (n\u2009=\u200914). Smokers were younger than non-smokers (61 vs. 69\u00a0years, p\u2009\u2264\u20090.001) and mainly male (73% male vs. 27% female). Smoking patients showed significantly more pre-existing pulmonary conditions (19% vs. 8%, p\u2009=\u20090.002) and alcohol abuse (48% vs. 23%, p\u2009\u2264\u20090.001). We observe more blood loss in smokers (800 [500\u20131237.5] vs. 600 [400\u20131000], p\u2009=\u20090.039), however administration of erythrocyte concentrates did not differ between both groups (0 [0\u20132] vs. 0 [0\u20132], p\u2009=\u20090.501). 58 out of 88 smokers (66%) and 147 out of 186 of non-smokers (79%) showed malign tumors (p\u2009=\u20090.019). 35 out of 88 active smokers (40%) and 98 out of 188 non- or former smokers (53%) developed DGE after surgery (p\u2009=\u20090.046) and smokers tolerated solid food intake more quickly than non-smokers (postoperative day (POD7 vs. POD10, p\u2009=\u20090.004). Active smokers were less at risk to develop DGE (p\u2009=\u20090.051) whereas patients with pulmonary preexisting conditions were at higher risk for developing DGE (p\u2009=\u20090.011).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Our data show that DGE occurs less common in active smokers and they tolerate solid food intake more quickly than non-smokers. Further observation studies and randomized, controlled multicentre studies without the deleterious effect of smoking, for instance by administration of a nicotine patch, are needed to examine if this effect is due to nicotine administration.<\/jats:p><\/jats:sec>","DOI":"10.1186\/s12893-021-01311-2","type":"journal-article","created":{"date-parts":[[2021,7,31]],"date-time":"2021-07-31T04:15:09Z","timestamp":1627704909000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Active smokers show ameliorated delayed gastric emptying after pancreatoduodenectomy"],"prefix":"10.1186","volume":"21","author":[{"given":"Jana","family":"Enderes","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jessica","family":"Teschke","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Martin","family":"von Websky","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Steffen","family":"Manekeller","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J\u00f6rg C.","family":"Kalff","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tim R.","family":"Glowka","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2021,7,31]]},"reference":[{"issue":"9","key":"1311_CR1","doi-asserted-by":"publisher","first-page":"2649","DOI":"10.1002\/cam4.767","volume":"5","author":"AS Quante","year":"2016","unstructured":"Quante AS, Ming C, Rottmann M, Engel J, Boeck S, Heinemann V, et al. 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